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US2207706A - Phonograph - Google Patents

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Publication number
US2207706A
US2207706A US494560A US49456030A US2207706A US 2207706 A US2207706 A US 2207706A US 494560 A US494560 A US 494560A US 49456030 A US49456030 A US 49456030A US 2207706 A US2207706 A US 2207706A
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United States
Prior art keywords
arm
record
pin
turntable
records
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Expired - Lifetime
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US494560A
Inventor
Edward F Andrews
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Individual
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Individual
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Priority to US494560A priority Critical patent/US2207706A/en
Priority to GB31182/31A priority patent/GB392173A/en
Priority to DEA64069D priority patent/DE608508C/en
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Publication of US2207706A publication Critical patent/US2207706A/en
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02Details
    • G11B17/04Feeding or guiding single record carrier to or from transducer unit
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/08Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records
    • G11B17/12Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records with axial transfer to the turntable from a stack with a vertical axis
    • G11B17/16Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records with axial transfer to the turntable from a stack with a vertical axis by mechanism in stationary centre post, e.g. with stepped post, using fingers on post

Definitions

  • This invention relates to phonographs, and particularly to phonographs in which a series of records may be played, and played records are automatically removed from the turntable.
  • One of the objects of the invention is to provide an improved automatic phonograph.
  • a further object of the invention is to provide a phonograph in which the player arm is adaptedto remove a played record, and thereafter to become returned to initial playing position for playing a second record.
  • a further object of the invention is to provide a phonograph having automatic means of raising and lowering the player arm and automatic means for causing the arm to move transversely over the turntable, such means being coordinated so thata played record is removed and the player arm returned to initial. playing position with respect to a second record.
  • a further object of the invention is to provide an automatic phonograph in which a played record is removed from the turntable by the action of the motor which drives the turntable.
  • a further object of the invention is to provide an automatic phonograph in which'a record is adapted to be removed from the turntable by means of a spring energized by the turntable motor.
  • a further object of the invention is-to provide an automatic phonograph in which the player arm is adapted to engage the record, and is actuated by the turntable motor to remove the record from the turntable and simultaneously energize a spring which is adapted to return the player arm to initial playing position.
  • a further object of the invention is to provide means for locating the returned player arm. at initial playing position-and to provide means 0.. adjustment to adapt the phonograph forplaying records of different sizes.
  • a further object of the invention is to provide an automatic phonograph in which a record is adapted to be removed from a turntable by means of the player arm, the mechanism for actuating the player arm being concealed from view.
  • -A further object of the invention is to provide a phonograph turntable having a record centermeans for removing superimposed records from a turntable in succession in which the removing member is adjusted separately for each record removal and is independent of cumulative error arising from variations of thickness of the records.
  • a further object of the invention is to provide a record removing member adapted to enter the opening of a record and having means cooperating with the face of the record to limit its entrance thereinto.
  • a further object of the invention is to provide in a phonograph, a centering pin havinga convex end and a record removing member having means for limiting its entrance into a record so that records of various thicknesses may be removed thereby.
  • a further object of the invention is to provide a table for supporting a series of records, having .a centering pin depressible from above, and a record removing member adapted to enter the opening of a record and depress the pin, said member having means limiting its entrance into the record opening, and said pin having a convex end to permit removal of records of various thicknesses.
  • a further object of the invention is to provide a stylus head and suspended member adapted to cooperate with a record when'applied to the center thereof, said member being adapted to be displaced by the rotation oi. the record when applied to same adjacent the edge thereof.
  • Figure 1 is a segmental, plan view 01' a phonograph embodying the invention.
  • Fig. 2 is a sectional view on a largerscale, taken on the line 22 of Fig. 1.
  • Fig. 3 is a sectional detail view taken on the line 33 of Fig. 1.
  • Fig. 4 is a sectional detail view taken on the line 4-4 of'Fig. 1.
  • Fig. 5 is a sectional view on a larger scale, taken on the line 5--5 of Fig. 4.
  • Fig. 6 is a similar sectional view taken on the line B6 of Fig. 4.
  • Fig. Us a fragmentary end view of the stylus head and associated parts, the records being partly broken away to disclose thecooperation of the record changing pin with the top record.
  • Fig. 3 is an elevational detail view showing the stylus head in playing relation.
  • Fig. 10 is a sectional plan view of the machine shown in Fig. 9, the position of the parts corresponding to the commencement of playing of a record.
  • I provide a combined tone or player arm and record changer i! for a phonograph I3.
  • This combined player arm and record changer is swingably supported above a turntable 19 by means of a bearing post or support member 2i which is secured to a motor board 22 adjacent the turntable it by means of screws 23, and is provided at its free end with the usual pick-up or stylus supporting member 2i carrying a needle 25 for playing records 26 supported on the turntable is.
  • the records 25, as shown in Fig. 2, maybe stacked on the turntable i9 and are held thereon by a depressible pin 27 engaging in the central apertures 28 of the records and slidaloly carried' in a longitudinal bore or hole 29 of a shaft or spindle 3i which rotates with a hub or con motor 32, secured to the under side of the turntable i3 by any suitable means such as rivets 33.
  • the pin 21 is provided with means which maintain it in record engaging position until it is moved during the record-removing operations in the manner hereinafter described.
  • Such means may suitably comprise a plunger 54 slidable in a tube 54a mounted transversely in the pin 21 so that the plunger 5d is pressed against the bore 29 of the shaft 3! by a spring 54b. It must be understood that this means is exemplary only since other suitable means may be employed for this purpose.
  • the end-of the tone or playing arm ll remote from the pick-up 25 is pivotally secured, as at 34,
  • This operating assembly 33 is carried by amounting plate 39 preferably on the underside of the motor board 22, for example by bolts 4!, to avoid. marring the outer appearance of the motor board and to facilitate driving the operating assembly by compact vand direct connections with the driving means.
  • the motor-board is preferably resiliently supported in a suitable cabinet.
  • the operating assembly 38 actuates a bell crank lever 42 journaled as shown in Figs. 2 and 3, on I a pin or bolt 43 supported by lugs or brackets 45 depending from the motor board.
  • the bell crank lever serves to raise and lower a link or spindle .45, the lower end of which is engaged in a slot or recess 46 in an arm 41 of the lever 42.
  • the spindle 45 is provided with a pinlike extension 45a which maintains it in engagement with thebell-crank lever 42.
  • the link or spindle 45 extends upwardly through the hollow shaft 36, and its upper end is pivoted at 48 to the playing arm II for raising and lowering the arm.
  • the bridge member 49 When the playing arm is raised upon the coming position at the edge of the record, as will be hereinafter described, the bridge member 49 is carried forwardly by the movement of the record to permit the needle to contact with the record surface as shown in Fig. 8.
  • This bridge member 49 carries a brush or soft member 52 which rests upon the record while playing, preventing the bridge member from engaging and scratching the record or producing a sound interfering with the reproduced'sound, and cleaning the record.
  • the player arm After the player arm is raised upon the completion of a record, it is then swung to the center of the record by means of the arm 31 rotating the hollow shaft 35. In this position the player arm is permitted to fall and a pin or finger 53 projecting as shown in Fig. '7, from the bridge member 49 below the needle 25 strikes the depressible pin 21 and depresses same sufliciently to permit the top record to be moved laterally to remove same from the turntable.
  • the pin 21 is preferably hollow and is provided with an aperture ord removing member is positioned separately with respect to each record which is to be removed and is independent of variations in record thickness which might have a cumulative effect.
  • the pin 53, projecting from bridge member 45 is of a length substantially less than the thickness of the thinnest record to be played so that, when a played record is being removed, the pin 53 will not mar the sound track of the succeeding record.
  • the depressible pin 21 is provided with a convex surface onv its upper end.
  • pin 53 may be substantially shorter than the thickness of a record to be removed, the record is easily removed and pin 21' is pushed down below the lowerface of the record being removed by the combined weight of the record and player arm. It will readily be under stood that the combined lengths of the pin 53 and the convex end of the pin can be readily arranged topermit records. of a wide range of thickness to be played and removed without adjustment of the machine.
  • the lower face of pin 53 is preferably slightly convex to prevent marringthe top surface of the last record when it is being repeated.
  • the player arm upon the engagement of the pin 53 in the record aperture, sweeps the record from the turntable and the record is deposited in a, record receiver or magazine 56 adjacent the motor board 22, as shown in Figs. 1 and 4. After the record has been deposited in the magazine the player arm is returned to a starting position ny suitable means.
  • ny suitable means Preferably, however, I,
  • the drive shaft 51 also carries a gear 6
  • the gear 62 is rigidly mounted on a sleeve which is rotatably supported on a shoulder 66 of a bushing 61 fixed or keyed on the shaft 63.
  • a notched wheel 68 having a plurality of notches or slots 69 therein at its periphery is also rigidly carried by the sleeve '65 so that it rotates with the gear 62 from which it is separated by a disc 1 I.
  • the notched wheel 68 is connectable in driving relation with the shaft 63 by means of a spring pressed pawl 12 pivoted at 13 to a disc 14 which is keyed or otherwise rigidly fixed to the shaft 63.
  • a cam 15 spaced above the disc 14 by a spacing sleeve 18 on the shaft 63 and a cam 11 located adjacent the plate 39 and engaged by the bushing 61, are also keyed or otherwise rigidly mounted upon the shaft 63, so that, when the end 18 of the pawl 12 engages in a slot 69 of the notched wheel, the shaft-63 is positively driven from the shaft 3
  • the pawl 12 is actuated by a spring 19 on the disc 14, which tends to press the pawl into engagement with the notched wheel 68. It is held out of engagement with the notched wheel 68 while the record is being played by a pin 8
  • This bar 82 is bifurcated as at 83 to slidingly engage in a groove 84 in the spacing sleeve 18 and has a slot 85 at its other end to slidingly engage an end of a stud or rod 86 upstanding from the plate 39.
  • the bar 82 is provided with a second depending pin 81 to which an end of a spring 88 is secured, the other end of the spring being secured to the stud 86.
  • 88 is adapted to retract the bar 82 carrying the pin 8
  • the slidable bar 82 is held in the forward position during the first part of the playing of a record by the engagement of a pin 89 upstanding from the bar with a cam surface 9
  • a spring 95 carried by the bar 82 presses a finger or projection 96 at the side of the pawl 92 opposite the projection 94 against a stop or pin 91 on the bar for holding the projection 94 against the edge 93 of the arm 31 to hold the-lever in the forward position until the record is played.
  • the pin 91 provides a positive abutment for the finger 96 when the arm 31 is moving in a clockwise direction during the playing of a record.
  • the arm 31 swings with it. If the record is one ending in a spiral groove the slidable bar 82 is held in the forward position until the sector arm 31 has moved to such a position that the projection 94 of the pawl 92 is clear of the outer edge 98 of the sector arm 81, where- The spring 1 upon the slidable bar 82 and pin 8
  • the end 93' of the edge 93 of the sector arm 31 is in such position relative 5 to the player arm 11 that the projection 94 of the pawl 92 clears the edge 93 when player arm I1 is substantially at the inner end of the spiral groove of the played record.
  • the sector arm 31 will oscillate with the player arm
  • the projection 94,00: the pawl 92, is 15 held in engagement with edge 93 of sector arm 31, by the spring 88, and the pin 89, on the slidable bar 82, is in the enlarged portion of the camslot 9
  • the surface 93 is in frictional engage-.
  • the normal position of the pawl 92 is such that the projection 94 of the pawl 92 is perpendicular tothe tangent at the point of contact between the projection 94 and the edge 93 of 30 the sector arm 31.
  • is forced outwardly by a rise "12 in the cam 11, the lever
  • the cam follower 9'9 moved .rearwardly by the rise I82 of the cam, causes the lever
  • a roller or cam follower l 03 depend- 5 ing from an arm I06 bifurcated as at I? to slidably engage a groove in a spacing sleeve I106 on the shaft 63 is following a cam dwell I09 of the cam 55, the cam dwell H09 terminating at a cam fall H0 which is engaged by the follower I when the player arm has been raised by the rise 802 of the cam 11.
  • the end of arm I 0t opposite the bifurcated end i0? is pivotally secured to a spring actuated disc Hi as at I I2, rotatably mounted by a hub I I3 on a depending portion of the tone arm support 2i.
  • a sleeve or bushing II8 carried at the lower end of the hollow shaft 36 maintains the strap H1 away from the axis of the disc HI so that it may apply an effective torque upon the pin I I6 when it is in the position shown in Fig. 5.
  • cam follower I05 on the lever I06 clears the cam dwell I22, abruptly releasing the lever I06 and permitting the spring M4 to rotate the disc III, carrying the cam follower I05 past the cam fall I24 towards the cam surface HI.
  • the counterbalancing spring I20 carried by the pivot shaft'3fl is provided.
  • the spring i20 also provides that the correct pressure is on the playing needle for properreproduction of the record.
  • the cam follower 99 is opposite or in contact with a short cam dwell 829 of the cam 11. As shown in Fig.
  • the playing arm is swung to its extreme position by the spring N4, the arm being stopped by the engagement of a pin I32, depending from the arm 31, with a resilient or yieldable member I33 mounted on a stud I34 depending from the motor board 22.
  • the resilient friction member I33 is shown as a bifurcated member having arms I35 yieldingly separable bythe pin I32 whereby to stop the playing arm gradually and without shock.
  • the pin I32 extends through the arm 31 and carries at its upper end a pawl I36 having an end I31 engageable in a notch or slot I38 in the drive disc II I and pressed against the edge of the disc by a spring I39 mounted upon the arm 31. by the spring H6, the notch I38 rotates past or into engagement with the end I31 before the pin I2I engages the arm 3'! to swing the playing arm I36 in the notch I38.
  • the pawl 12 has completedone revolution around the shaft 63 and comes into engagement with the pin 8I of the bar 82, which, as indicated above, has alreadyv been moved forward by the arm. 31.
  • the engagement between the pin 8I and the pawl 12 interrupts the drive 'of the cams 15 and 11 until, at the end of the playing of a record, the pawl 92 is released to permit the bar 82 to move once more into its retracted position.
  • the ring I is provided with a hub I49 which enters an opening in the motor board 22 around nut I58 and may readily be adjusted to desired position in the slot I53. It will readily be understood that adjustment of the pin I52 changes the position of the pin I43 and thus controls the returned position of the arm 31 to adapt it for records of desired size.
  • the depressibe center pin 21 is of such length, relative to the length of bore 28 in shaft 3
  • the turntable may be driven continuously at substantially uniform speed by any suitable motor.
  • An electric motor I94 preferably asynchronous motor, where alternating current is 5 available, is advantagebusly'employed.
  • the motor I84 may be mounted on the motor board 22,
  • the current for the motor may be controlled by the switch I91 and when asynchronous motor is employed, it may be conveniently started by manually rotating the turntable up to the normal or a greater speed.
  • the support member 2I is preferably hollow, its lower end being closed by a plate I 68 which is provided with a central hub I63 which provides a bearing for the shaft 36 and for a hub I64 of an arm I51 which is rotatably supported by means of the collar of the arm 31, which is rigidly mounted on the shaft 36.
  • a spring I55 is located around the hub I64, one end I56 being secured to the motor board 22, and the other end of the spring engaging the arm I 51 so as to tend to rotate same in the counter-clockwise direction as viewed in Fig. 10.
  • the arm I51 carries a depending pin I I58 which lies in the path of the arm 31 and is adapted to cooperate therewith in the manner hereinafter described.
  • the arm I 51 is adapted to abut upon a pin I59 which may, if desired, be adjustable in position.
  • the pin I59 may be supported in a slot I62 in the motor board 22, and have a threaded upper, portion which extends through the slot and is engaged by a thumb nut I6I on the upper side of the motor board 22.
  • the thumb nut I6I may be unscrewed and the pin I59 adjusted in desired position in the slot I62 so as to adjust the movement of the arm I51 and the momentum which it supplies to the returning arm I1 and associated parts.
  • This mechanism comprises a sector I65 which is rotatably carried by a pin I66 adjacent the under side of the motor board 22.
  • the pin I66 extends through a slot I61 in the motor board and is adapted to be secured in desired position therein by means of a thumb nut I68.
  • the other end of the sector I65 is bifurcated to provide a relatively long arm I69 and a relatively short arm I18, a recess I1I being provided therebetw'een.
  • the arm I18 is provided with a projecting tooth or catch I12 which overhangs the recess I1I.
  • the arm I 65' Adjacent the catch I12 the outer surface of the arm I18 is bevelled asshown at I13 for a purpose which will hereinafter appear.
  • the arm I 65' carries stops I14 which limit the movement of the end of an arm I15 pivotally connected at I16 to a radial arm I11 carried by the opposite ,end of 'the sector I65.
  • a weak spring I18 is provided which normally presses the edge I19 of the arm I15 outwardly to a position beyond the catch I12.
  • the sector. I65 tends to move in the clockwise direction, as'viewed in Fig. 10, under theinfluence of a spring I88, which is secured to the arm I11 and to the motor board 22.
  • the arm I69 of the sector I65 is normally held by this spring in engagement with a vertical rod IBI rigidly secured to the lever. IN.
  • a projection I82 mounted on one of the sectors of the arm '31 is adapted to cooperate with the catch I12 and the face I 19 of the arm I15.
  • a spring 285 suitably secured to the bell crank lever 42 and to the plate 38 causes the cam follower 88 to follow the cam 11. This spring is sumciently strong to efiect the release of the catch I72 against the action of the spring I89.
  • cams 15 and 11 difiers considerably from that described in connection with the modification first described. The nature of these cams will more readily be understood from the operation of this modifica-- ticn, which will hereinafter be described.
  • the motor I9d during the removal of a record has a considerable load imposed upon it. At this period the motor rotates the turntable, moves the player arm I1 to move the record over the turntable, and energizes the spring I55. It is, therefore, preferred to provide the motor with additional power at this time. This may conveniently be done by providing a suitable resistance I98 in series with the winding I99 of the motor I93, which resistance is automatically shunted when the increase of power is needed.
  • the shunt circuit comprises a pair of conductors 299 connected by a switch 2M which is controlled by the movement of part of the mechanism.
  • the switch may suitably be controlled by the movement of the arm I51 an may comprise a pair of resilient contact arms 292 and 293 tending to contact with each oth'er.
  • the contact arms may be mounted on a plate 294 carried by, and movable with the pin I59.
  • the contact arm 292 is slightly longer than the contact arm 293 so that it is engaged by the arm I51, when it abuts against the pin I59, and breaks the shunt circuit.
  • the contact arm 292 makes contact with the contact arm 293 and the resistance I98 is shunted and the power of the motor is increased until the arm I51 returnsto its position in abutment with the pin I59.
  • the portion of the pin I59 within the slot I52 is of square cross-section to maintain the plate 294 and the contact arms in operative position.
  • Fig. 10 The position of parts shown in Fig. 10 corresponds to the commencement of the playing of a record, the catch I12'having been forced clear of the projection I82, arm I1 having been lowered into its initial playing position and being about to be brought into cooperation with the track of the record by the arm I15, and the arm I51 being in contact with the abutment I59- so that the shunt circuit is broken and normal power is supplied to the motor I94.
  • the bar 82 is in its forward position, and the pawl 12 is thereby held out of engagement with the notched wheel 69 so that the cams 15 and 11 are stationary.
  • the arm 31 moves in a clockwise direction as seen in Fig. 10, which movement is progressive until the pawl 12 is released and the cams are put into rotation in the manner described above.
  • the lever I95 has been drawn rearwardly somewhat by the arm 31 and the cam follower I95 is out of contact with the cam 15.
  • the cam follower 99 rides over a cam rise I83 on the cam 11 which raises the player arm I1.
  • the cam follower I95 is engaged by a cam rise I84 on the cam-15 and the arm 31 is rotated thereby to bring the elevated arm I1 into position I over the center of the records 26, as shown in Fig. 9.
  • the arm 31 contacts with the pin I58 of the arm- I51 and moves it slightly, thereby closing the switch 2M and shunting the resistance I98 so as to increase scribed. Mter this condition is established, the
  • the cam follower 99 rides over a. cam dwell I85 which maintains the arm. I'I elevated.
  • the cam follower 99 passes over a cam fall I96 which permits the arm I1 to fall to bring the pin 53 into the opening 23 of the top record, depressing the pin 21 in the manner above decam followers 99 and I riding'on cam dwells I91 and IE9 respectively, the cam follower I95 rides over a long gradual cam rise I89 which translates the-arm I1 so as to remove the topirecord and discharge it into the magazine 56.
  • the arm 31 is rotated through a wide angle so as to contact with the pin I58 and move the arm I51 to its extreme position, thereby coiling or energizing the spring I 55.
  • the cam follower 99 enters into contact with the cam rise I98 which has the eifect of elevating the arm H to its highest position.
  • the subsequent movement. of the arm I1 into its extreme position is effected with the arm thus ele- "vated. This elevation corresponds to the contact of the cam follower 99 with the cam dwell I9I.
  • the cam 15 is provided with a radial fall I92 so that the return of the arm I1 is rapidly effected through the action of the spring I55 upon the. arm I51, which in turn acts through the pin I58 upon the arm 31.
  • the arm I51 is stopped by contact with the pin I59, the arm I1 and asso-' ciated parts have sumcient momentum to carry them beyond their. initial playing position. As indicated above, this momentum may, if desured, be adjusted by the position of the pin I59 in the slot I52.
  • the arm 31 consequently rotates in a counter-clockwise direction, as viewed in Fig.
  • cam follower I 95 moves over the cam i fall I92
  • the cam follower 99 passes over a cam fall I93 which permits the player arm I1 to descend to bring the needle 25 into contact with the record.
  • the descent of the arm I1 depends I upon the number of records which are located upon the turntable I9.
  • the cam follower 99 moves over the cam fall I93, being caused to follow same by the spring 295, until the rod I8I moves the sector I65 against the tension of the spring I80. Consequently, when the cam follower 99 approaches the endof thecam fall I93, the projection I92 of the arm 3-1 is released by the catch, I12 and the player arm is pressed gently by the arm'fli, under the action of the 7 spring I", into engagement with the track of the record.
  • the cam fall I93 may, if desired, lead the cam follower 99 to a position somewhat closer to the center of the shaft 63 than it has when it moves over the cam dwell I88, to permit the last rec-.
  • a rotatable turntable in playing relation, means carried by the player'arm for engaging a record in playing relation, means carried by the player arm for engaging the record to remove same from the turntable, and means for actuating the arm for removing the record from the turntable.
  • a rotatable turntable in combination, a rotatable turntable, an arm having means to engage a record thereon to remove same, means for raising and lowering said arm, and a spring for moving the arm transversely to remove the record, said means and the turntable being operatively con- I nected.
  • a rotatable turntable an arm having. means to engage a record thereon to remove same, spring means adapted to move the. arm transversely in one direction, and means for alternately raising and lowering said arm and moving it transversely in the opposite direction, said arm being adapted to move over the turntable in its lowered position during recordremoval so as to cause the record to slide upon the surface therebeneath.
  • a rotatable turntable in combination, a rotatable turntable, an arm having means to engage a record thereon to remove same, spring means adapted to move the arm transversely to remove the record from the turntable, and means for raising and lowering said arm and moving it transversely in the opposite direction and reenergizing the spring means.
  • a rotatable turntable an arm having means to engage a record thereon to remove same, means for alternately raising and lowering said arm and movplayer arm for engaging the record to remove same, spring means adapted to move the arm transversely in one direction, and means for al-' ternately raising and lowering said arm andmoving it transversely in the opposite direction;
  • a rotatable turntable in combination, a player arm, means carried by the player arm for engaging a record in playing relation, means carried by the player arm for engaging the record to remove same, spring means adapted to move 'the arm transversely to remove the record from the turntable, and means for raising and lowering said arm'and moving it transversely in the opposite direction and reenergizing the spring means.
  • a rotatable turntable in combination, a player arm, means carried by the player arm for engaging a record in playing re lation, means carried by the player arm for engaging the record to remove same, means for raising and lowering said arm and moving it transversely to remove the record from the table, and spring means adapted to be energized by said transverse movement for returning the arm to initial position.
  • a turntable in combination, a turntable, a player arm provided with a sound reproducing element, and operative means for actuating the player arm to cause it to engage a record on the turntable, move the arm away from the engaging position to remove the record and return the arm to initial playing position.
  • a player arm having a needle adapted to cooperate with the track of a record
  • depending member mounted on the player arm, means on said depending member adapted -to-enter the record opening to engage the record,'and means adapted to swing said player arm transversely to move said record bodily.
  • a player arm having a needle adapted to cooperate with the track of a record, a member pivotally supported on the arm and adaptedto hang below the needle, said member being adapted to be moved out of the way of the needle by the rotation of the record when the arm is lowered in a playing position of the arm, means carried by said member adapted to enter the, opening of a record when the arm is lowered in the central position thereof, and means adapted to swing said player arm transversely to move said rec- 'ord bodily.
  • a player arm having a needle adapted to cooperate with the track of a record, a member pivotally supported on the arm and adapted to hang below the needle, said member being adapted to be 'ord when the arm *is lowered in the central position thereof, yielding means carried by the depending member .to contact with the recordduring playing, and means adapted to swing said move said record bodily.
  • av phonograph in combination; a tumtable, a player arm, operative means for removing a played record from the turntable, an arm rotatable with the player arm, and provided with a pair of arcuate surfaces, one of which is cut away to provide a cam surface, a movable element controlling the drive of said operative means, means carried by said element adapted to cooperate with the cam surface and associated arcuate surface, said means being adapted to engage the cam surface when the player arm is returned to initial playing position to move the element 5 into drive disconnecting position, and a pivoted pawl carried on said element adapted to engage the other arcuate surface of the arm and maintain said position until the end of the playing of the record.
  • a turntable in combination, a turntable, a player arm, operative means for removing a played record from the turntable, an arm rotatable with the player arm and provided with an arcuate surface, a movable element controlling the drive of said operative means, and a pawl carried on said element adapted to engage said surface to maintain the element in drive disconnecting position during playing of a record, said pawl being adapted to be released by reverse movement of the arm to permit the element to move into drive connecting position.
  • a-turntable adapted to receive a plurality of superimposed records
  • a player arm adapted to cooperate with the topmost record in playing relation
  • a member carried by the player arm a magazine located laterally of, and below the turntable and adapted to receive played records
  • operative means adapted to actuate the player arm after playing a record, to elevate same, move it to the center of the record, lower it so that said member carried thereby enters the central opening of the topmost record, move it laterally to bring said record into a position where it may move into the magazine, elevate it, return it to initial playing position and lower it into playing relation with the next record.
  • a turntable in combination, a turntable, a player arm provided with a sound reproducing element, record engaging means carried by said arm, means for actuating the arm to cause said record engaging means to sweep records from the turntable, means to return the arm to initial playing position, and adjustable means for arresting the arm in diiierent positions to accommodate the phonograph for playing records of difierent sizes.
  • a turntable in combination, a turntable, a motor for rotating the turntable, a player arm, means including resilient means for swinging the arm from final playing position back to a position adjacent initial playing position, a catch for engaging a member swingable with the arm and holding the arm in said position adjacent the initial playing position, and means driven from the motor for controlling the release of the arm from the catch.
  • a turntable in combination, a turntable, a player arm, resilient means for swinging the arm from flnal playing position to initial playing position, means for elevating and lowering the arm, a catch for engaging a member swingable with the arm, to arrest the swung arm to hold the same adjacent initial playing position, and means associated with the means for lowering the arm for releasing the arm from the catch, said catch being mounted to permit adjustment to adapt the phonograph to play records of difl'erent sizes. 19.
  • a turn table in combination, a turn table, a player arm, resilient means for swinging the arm to initial playing position, means for elevating and lowering the arm, a catch for engaging a member swingable with the arm, to arrest the swung arm and hold same adjacent initial playingposition, means associated with the means for lowering the arm for releasing the arm from the catch, and resilient means associated with the arm to imparts slight motion to the arm when released so as to push the arm towards the track of the record, said catch being mounted to permit adjustment to adapt the phonograph to play records of different sizes.
  • a turntable in combination, a turntable, a synchronous electric motor for driving same, a resistance in series with the winding of the motor, a player arm, a spring for returning the player arm to initial playing position, operareadily movable in said bore and maintaining a position therein to which it may be moved.
  • a turntable in combination, a turntable, a pin frictionally held in a bore therein and adapted to project above the surface of the turn-- table to pass through the openings of a plurality of records placed thereonand a record removing arm having a pin, means for actuating the record removing arm to apply its pin to the first said pin to depress same, means limiting said depression to approximately the thickness of a record, means for swinging the armto remove the record from the turntable, said first mentioned being readily movable in said bore and maintaining a position therein to which it may be moved. 24.
  • a turn-- table in combination, a turn-- table, a centering'pin adapted to pass through i the openings in records placed thereon, said pin being depressible from above, a record removing member, means for actuating said member to cause .it to enter the opening of a record and depress the pin below ,the upper surface'thereof,
  • a table for supporting records a centering pin adapted to pass through the openings in records placed thereon, said pin being depressible, and frictional means for maintaining the pin in a plurality of positions.
  • a table for supporting records in combination, a centering pin having a convex upper end adapted to pass through the openingsin said records, said pin being depressible, a. record removing pin, means for causing the-.recordremoving pingto enter into a;record opening and depress the dep'ressible pin, said record removing pin having a shoulder adapted to engage the upper surface of said record and limit table.
  • said turntable being mounted for rotation in a fixed plane during the playing oi.
  • a pin in the center of the turntable said pin being depressible into the boreof the turntable for substantially the thickness of the stack and being adapted to pass through the openings in the records, and a depressing pin, means actuating the depressing pin to cause it to move above the turntable andstack of records, and enter the opening in the uppermost record, means for limiting the entrance of the depressing pin into the opening in the uppermost record an amount substantially equal to the thickness of the record, depressing said depressible pin so as to release only the uppermost record, and to move sideways thereby removing the ,eleased record from the turntable.
  • a tumtable in combination, a tumtable, a centering. pin adapted to pass through openings in records placed thereon, said pin being depressible from above, a player arm adapted to cooperate. with a :record on the turntable to reproduce same, and means carried by the player arm adapted to depress the pin.
  • an automatic phonograph in combination, a turntable, a motor for driving same, record changing mechanism driven intermittently from said motor, clutch means for connecting said motor to said record changing mechanism, a player arm, means having a smooth arcuate surface moving therewith, a movable element controlling said clutch mechanism, and a pawl carried by said element adapted") engage said surface to maintain said clutch means disconnected, said pawl being adapted to be actuated by reversal of motion of said surface and by passing off said surface to effect engagement of said clutch mechanism.
  • a turntable having a spindle provided with an axial bore, a depressible pin in the bore of the turntable adapted to center a stack of records thereon, said pin being adapted to project through the complete stack of records and being mounted to permit it to be depressed substantially the thickness of the stack, said turntable being mounted for rotation in a fixed plane during theplaying of a stack of records, an arm adapted to move above said record stack and downwardly through said stack position into close propinquity to the turntable, a magazine located laterally of, and below the turntable and adapted to receive played records, operative means for actuating said arm to cause it to move to depress said pin to progressively lower positions, engage the topmost record of said stack and slide itofl, while all the records 'therebeneath are held centered by said pin, to raise said arm to a definite height and return same, and means controlling the operative means for repeated operation upon the record next below the topmost record after said next record has been played
  • a phonograph comprising a sound reproducing element, a turntable adapted to support a stack of records, a motor for rotating the turntable, a depressible pin in said turntable projecting through the center holes of said records, an
  • an automatic phonograph in combination, a motor, a turntable operated thereby, a depressible pin adapted to center a stack of records on the turntable, an arm adapted to swing horizontally above said turntable, means for swinging said arm vertically to cause it to depress the depressible pin and engage the center opening of the topmost record of said stack, means driven by said motor for swinging said arm to slide off said topmost record from said turntable and means energized by the swinging of said am for returning said arm towards its initial position.
  • a turntable adapted to support a stack of records, said turntable having a spindle provided with an axial bore, a depressible center pin in said turntable bore adapted to pass through the holes in the records of said stack and to be depressed step by step until its upper end is located adjacent the turntable, means above the turntable for depressing said pin, means associated with the depressing means adapted to engage the topmost record and limit the depression of the pin to the level of the lower surface of said record, all the records below the top record being held centered by the depressible pin, and means for sliding the top record oil the stack.
  • a turntable adapted to support a stack of records thereon, said, turntable having a spindle provided with an axial bore, a depressible centering pin withinsaid bore and adapted to extend upwardly from the turntable through the central openings ofthe records of said stack and to be depressed step by step until its upper end is located adjacent the turntable, a pin movable abpve the stack of records, means causing said movable pin to enter the opening of the topmost record and depress the depressible pin step by step to free the topmost records therefrom, and means for moving said movable pin transversely while in said last mentioned position to cause the topmost rec-" ord to slide ofi over the surface therebeneath and thereby eifect the removal of the topmost record from the stack.
  • a turntable adapted to support a stack of records, said turntable having a spindle provided with an axial bore, a depressible centering pin located in said bore extending upwardly from the turntable through the central openings of said records, an arm movable above said stack of records, a pin carried by said arm, means for moving said arm downwardly through progressively greater distances causing last said pin to enter the opening of the topmost record and depress the depressible pin to free the topmost record therefrom, and means for moving said arm transversely to cause the topmost record to slide over the surface therebeneath and thereby eiiect the removal of the topmost record from the stack.
  • a sound reproducing element in combination, a turntable adapted to support a stack of records, a depressible centering pin extending upwardly from the turntable through the central openings of said records, an
  • a turntable adapted to support a stack of records, a depressible center pin in said turntable passing through the holes in said records, depressing means above the turntable for depressing said depressible pin just enough to free the top record herefrom, all of the records below the top record being held in place by the depressible pin, means for removing the top record, and means for means for swinging said depressing means to slide off the topmost record, and meansfor elevating the depressing means free of said record to permit said record to move laterally.
  • a turntable adapted to support a stack of records, said turntable having a'spindle'provided with an axial I bore, a depressible center pin in said bore passing through the holes in said records, a record removing arm pivotally mounted to swing in a vertical plane through the record stack position, means carried by said arm for depressing the pin and means associated with the depressing means adapted to, engage the top record and limit the depressioiidpf the. pin to the level of the lower surface of said record, all of the records below the top record being held in place by the depressible 44.
  • a turntable adapted to support a stack of records, said turntable having a spindle provided with an axial bore, a depressible center pin in said-bore passing through the holes in said records, a record removing arm pivotally mounted to swing. in a verticalplane through the record stack position, means carried by said arm adapted to enter the opening of the top record and depress the depressible pin, and means carried by said arm adapted to engage the top record and limit the depressing movement of the arm to free only the-top record from the pin, the records below the top record being held in place by the depressible pin.
  • a turntable adapted to support a stack of'records, said turntable having a spindle provided with an axial bore, a depressible center pin in said bore passing through the holes in said records, a record removing arm pivotally mounted to swing in a vertical plane through the record stack position and pivotally mounted to swing in a horizontal plane, means carried by said arm for depressing the pin just enough to free the top record therefrom, the records below the top record being. held by the depressible pin, and means for causing the arm to swing horizontally to slide said top record off the stack.
  • a turntable adapted to support a stack of records, said turntable having a spindle provided with an axial bore, a depressible center pin in said bore passing through the holes in said records, a record removing arm pivotally mounted to swing in a vertical plane through the record stack position and pivotally mounted to swing in a horizontal plane, means carried by said arm adapted to enter the opening of the top record and depress the depressible pin, means carried by said arm adapted to engage the top record and limit the depressing movement of the arm to free only the top record from the pin, the records below the top record being held by the depressible pin, and means for causing the arm to swing horizontally to slide the top record oil the stack.
  • a turntable in combination, a turntable, said turntable being adapted to support a stack of records and arranged to rotate in a fixed plane during thesucce'ssive playing of recor'ds of the stack, a depressible center pin for said turntable passing through the holes in said records and adapted to be depressed through a distance substantially equal to the thickness of the stack, a.
  • a turntable in combination, a turntable, said turntable being adapted to support a stack of records and arranged to. rotate in a fixed plane during the successive playing of the stack of 'records, a depressible center pin for said turntable passing through the holes in said records and adapted to be depressed to a position close to the turntable substantially through stack position, arecord-r-emoving arm extending above said turntable and operable to remove records from the turntable at various levels, a depressing pin carried by said arm, and means. adapted to actuate said arm to cause said depressing pin to depress the depressible pin, means carried by said arm limiting said depression so as to free the top record only from the depressible pin, the records below the top record being held by the depressible pin.
  • a turntable in combination, a turntable, said turntable being adapted to support a stack of records and arranged to rotate in a fixed plane during the successive playing of the stack 1 of records, a depressible center pin for said turntable passing through the holes in said records and adapted to be depressed to a position close to the turntable substantially through stack position, a record-removing arm extending above said turntable and operable to remove records from the turntable at various levels, means adapted to actuate said arm to cause it to depress the pin just enough to free the top record, the records below the top record being held by the depressible pin, and means for moving said arm horizontally to slide off said top record.
  • a turntable having a spindle provided with an. axial bore, said turntable being adapted to support a stack of records and arranged to rotate in a fixed plane during the successive playing "of the stack of records, a center-pin in said bore of said turntable passing through the holes in said rec- I ords and adapted to be depressed to a position close to the turntable substantially through stack position, a record-removing arm extending above said turntableand operable to remove records from the turntable at various levels, a depressing pin carried by said arm, means adapted to actuate said arm to cause said depressing pin to depress the depressible pin, means carried by said arm limiting said depression so as to free the top record, the records below the top record being held by the depressible pin, and means for moving said arm horizontally to slide off said top record.
  • a tumtable adapted to receive a stack of records
  • a depressible pin for said turntable adapted to project upwardly through the holes in said records
  • a record-removing arm mounted to swing vertically and horizontally, means for elevating the arm
  • a depressing member on said arm adapted to engage said depressible pin and depress same within the opening of the top record
  • a turntable for supporting a stack of records, a depressiblejcentering'pin passing through holes in the records, a depressing pin movable above said turntable, means for causing said depressing pin to depress said depressible pin and engage the ing the successive playing of said records for depressing the pin in a series of steps through a distance substantially equal to the thickness of said stack of records, and means associated with said first named means for'limiting the depression of said pin at each step substantially to the level of the underside of the topmost'record.
  • a phonograph comprising a turntable adapted to receive a stack of records, said turntable having a spindle provided with an axial bore, a depressible pin mounted in said bore and adapted to project upwardly through the open-,- ings in said records, record removing means being mounted for movement above said stack tending to fall downwardly through the space occupied by said stack to depress the pin nearly to the turntable, and means on said record removing means adapted to engage the top record to limit the depression of the pin to a position in which its upper end is substantially in the plane of the underside of thetopmost record.
  • a phonograph comprising a turntable
  • said turntable having a spindle provided with an axial adapted to project upwardly through the 'openings in said records, a record removing arm movable above said records, means tending to cause said arm to descend by gravity in the path of said pin through the space occupied by said stack to a position adjacent the turntable, said arm being capable of being arrested at a series of higher positions by the then topmost record of the stack, and means carried by said am for depressing the pin to a position in which its upper end is substantially in the plane of the underside of the topmost record.
  • a support fora stack of records a centering pin passing through holes in said records, a depressing pin mounted for movement to a plurality 'of record levels for depressing said centering pin, means associated with the depressing pin adapted to engage the surface of the topmost record to bring the upper end of the centering A tending through said records, said bore and pin pin'substantially to the level of the underside of the topmost record, and means resisting the movement of said centering pin below said posi-.
  • a turntable for supporting a stack of records, a centering pin slidably mounted in a bore in said tumtable and passing through holes in said records, a depressing pin, an abutment associated with said depressing pin, said abutment being spaced inwardly of the free end of said depressing pin a distance substantially equal to the thickness of a record; means mounting said depressing pin and abutment for movement to a plurality of record levels for engaging the uppermost record of the stack and depressing said centering pin to bring its upper end substantially to the level of the underside of the topmost record, and means associated with said centering pin for resisting the movement of said centering pin below said position.
  • a turntable adapted to support a stack of records, said turntable having a spindle provided with an axial bore, a depressible pin located in said bore exbeing correlated to permit the pin to be depressed into said bore to free at least all the records of the stack except the lowermost, means above said turntable, to depress said pin and having a limited entry into the opening of the top record for 7 causing said record to slide 01f the stack.
  • a turntable in combination, a turntable, a player arm, means including resilient means for swinging the arm fromfinal playing position back to a position adjacent initial playing position, a catch for engaging a member swingable with said arm'and holding the arm in.
  • a tumtable, a player arm means including resilient means for swinging the arm in one direction from final playing position back to a position adjacent initial playing position, a catch for engaging a member swingable with the arm and holding the arm in said position adjacent initial playing position, motor means for rotating the turntable controlling the Y and energizing said resilient means, means actu ated by said motor means for controlling the release of the arm from said catch, and means cooperating with the arm for biasing the arm in the opposite direction into initial playing position whereby the arm is pushed towards the track of the record when the armis released from the catch.
  • a turntable in combination, a turntable, a player arm, means including resilient -means' for swinging the arm to a position adjacent initial playing position, means mounting the playing position, means associated with the' means for eiiecting separation and approach between the arm-and turntable for releasing the arm from thecatch, biasing means for imparting a slight motion to the member when released 7 so as to push the arm towards the track oi.

Landscapes

  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
  • Feeding And Guiding Record Carriers (AREA)

Description

E. F. ANDREWS 2,207,706
July 1%, 1940.
' PHONQGRAPH Filed Nov. 10, 1930 7 Sheets-Sheet l (fdwardi 4730 119105.
' y 16, 1940- E. F. ANDREWS I 2,Z07,'70(: v-
PHONOGRAPH Filed Nov. 10, 1950 7-Sheets-Sheet 2 Ida/c00 26760 723205 16, 1940. E AN vs 2,207,706
PHONOGRAPH Filed Nov. 10, 1950 7 Sheets-Sheet 5 Jvzvanimala/4rd JMews Jilly 16, 1940- E. F. ANDREWS 2,207,706 5 1 PHONOGRAPH .Fiiedflov. 10. 1950 7 Sheets-Sheet 4 July l6, 1940. E. F. ANDREWS 1 5 0 PHONOGRAPH Filed Nuv. 10, 1930 7 Sheets-She et 5 w Wi E 053 y 15, 1940- E. F. ANDREWS 2,207,706
- PHONQGRAPH Filed Nov. 10, 1930 7 Sheets-Sheet 6 W-MIM d133,;
July 16, 1940. E. F. ANDREWS PHONOGRAPH Filed Nov. 10, 1930 7 Sheets-Sheet 7 x @N SW Patented July 16, 1940 UNITED STATES PATENT OFFICE PHONOGRAPH Edward F. Andrews, Chicago, Ill. Application Name; 10, 1930, Serial No. 494,560
62 Claims.
This invention relates to phonographs, and particularly to phonographs in which a series of records may be played, and played records are automatically removed from the turntable.
One of the objects of the inventionis to provide an improved automatic phonograph.
A further object of the invention is to provide a phonograph in which the player arm is adaptedto remove a played record, and thereafter to become returned to initial playing position for playing a second record.
A further object of the invention is to provide a phonograph having automatic means of raising and lowering the player arm and automatic means for causing the arm to move transversely over the turntable, such means being coordinated so thata played record is removed and the player arm returned to initial. playing position with respect to a second record.
A further object of the invention is to provide an automatic phonograph in which a played record is removed from the turntable by the action of the motor which drives the turntable.
A further object of the invention is to provide an automatic phonograph in which'a record is adapted to be removed from the turntable by means of a spring energized by the turntable motor. I
A further object of the invention is-to provide an automatic phonograph in which the player arm is adapted to engage the record, and is actuated by the turntable motor to remove the record from the turntable and simultaneously energize a spring which is adapted to return the player arm to initial playing position.
A further object of the invention is to provide means for locating the returned player arm. at initial playing position-and to provide means 0.. adjustment to adapt the phonograph forplaying records of different sizes.
A further object of the invention is to provide an automatic phonograph in which a record is adapted to be removed from a turntable by means of the player arm, the mechanism for actuating the player arm being concealed from view.
-A further object of the invention is to providea phonograph turntable having a record centermeans for removing superimposed records from a turntable in succession in which the removing member is adjusted separately for each record removal and is independent of cumulative error arising from variations of thickness of the records. I
A further object of the invention is to provide a record removing member adapted to enter the opening of a record and having means cooperating with the face of the record to limit its entrance thereinto.
A further object of the invention is to provide in a phonograph, a centering pin havinga convex end and a record removing member having means for limiting its entrance into a record so that records of various thicknesses may be removed thereby.
A further object of the invention is to provide a table for supporting a series of records, having .a centering pin depressible from above, and a record removing member adapted to enter the opening of a record and depress the pin, said member having means limiting its entrance into the record opening, and said pin having a convex end to permit removal of records of various thicknesses.
A further object of the invention is to provide a stylus head and suspended member adapted to cooperate with a record when'applied to the center thereof, said member being adapted to be displaced by the rotation oi. the record when applied to same adjacent the edge thereof.-
Other objects, advantages and capabilities of the invention will appear from the following description thereof, taken in conjunction with the accompanying drawings, in which:
Figure 1 is a segmental, plan view 01' a phonograph embodying the invention.
Fig. 2 is a sectional view on a largerscale, taken on the line 22 of Fig. 1.
Fig. 3 is a sectional detail view taken on the line 33 of Fig. 1.
Fig. 4 is a sectional detail view taken on the line 4-4 of'Fig. 1.
Fig. 5 is a sectional view on a larger scale, taken on the line 5--5 of Fig. 4.
' Fig. 6 is a similar sectional view taken on the line B6 of Fig. 4.
Fig. Us a fragmentary end view of the stylus head and associated parts, the records being partly broken away to disclose thecooperation of the record changing pin with the top record.
Fig. 3 is an elevational detail view showing the stylus head in playing relation.
modified form of phonograph, the player arm being shown in elevated position over the center of the records; and
Fig. 10 is a sectional plan view of the machine shown in Fig. 9, the position of the parts corresponding to the commencement of playing of a record.
Referring to Figs. 1 to 8 of the drawings, I provide a combined tone or player arm and record changer i! for a phonograph I3. This combined player arm and record changer is swingably supported above a turntable 19 by means of a bearing post or support member 2i which is secured to a motor board 22 adjacent the turntable it by means of screws 23, and is provided at its free end with the usual pick-up or stylus supporting member 2i carrying a needle 25 for playing records 26 supported on the turntable is.
The records 25, as shown in Fig. 2, maybe stacked on the turntable i9 and are held thereon by a depressible pin 27 engaging in the central apertures 28 of the records and slidaloly carried' in a longitudinal bore or hole 29 of a shaft or spindle 3i which rotates with a hub or con motor 32, secured to the under side of the turntable i3 by any suitable means such as rivets 33. The pin 21 is provided with means which maintain it in record engaging position until it is moved during the record-removing operations in the manner hereinafter described. Such means may suitably comprise a plunger 54 slidable in a tube 54a mounted transversely in the pin 21 so that the plunger 5d is pressed against the bore 29 of the shaft 3! by a spring 54b. It must be understood that this means is exemplary only since other suitable means may be employed for this purpose.
The end-of the tone or playing arm ll remote from the pick-up 25 is pivotally secured, as at 34,
the playing arm I I, the playing arm being swingable about the axis of the hollow shaft 36 in playby the reference character 33. This operating assembly 33 is carried by amounting plate 39 preferably on the underside of the motor board 22, for example by bolts 4!, to avoid. marring the outer appearance of the motor board and to facilitate driving the operating assembly by compact vand direct connections with the driving means. The motor-board is preferably resiliently supported in a suitable cabinet.
The operating assembly 38 actuates a bell crank lever 42 journaled as shown in Figs. 2 and 3, on I a pin or bolt 43 supported by lugs or brackets 45 depending from the motor board. The bell crank lever serves to raise and lower a link or spindle .45, the lower end of which is engaged in a slot or recess 46 in an arm 41 of the lever 42. At its lower end the spindle 45 is provided with a pinlike extension 45a which maintains it in engagement with thebell-crank lever 42. The link or spindle 45 extends upwardly through the hollow shaft 36, and its upper end is pivoted at 48 to the playing arm II for raising and lowering the arm.
When the playing arm is raised upon the coming position at the edge of the record, as will be hereinafter described, the bridge member 49 is carried forwardly by the movement of the record to permit the needle to contact with the record surface as shown in Fig. 8. This bridge member 49 carries a brush or soft member 52 which rests upon the record while playing, preventing the bridge member from engaging and scratching the record or producing a sound interfering with the reproduced'sound, and cleaning the record.
After the player arm is raised upon the completion of a record, it is then swung to the center of the record by means of the arm 31 rotating the hollow shaft 35. In this position the player arm is permitted to fall and a pin or finger 53 projecting as shown in Fig. '7, from the bridge member 49 below the needle 25 strikes the depressible pin 21 and depresses same sufliciently to permit the top record to be moved laterally to remove same from the turntable. The pin 21 is preferably hollow and is provided with an aperture ord removing member is positioned separately with respect to each record which is to be removed and is independent of variations in record thickness which might have a cumulative effect.
The pin 53, projecting from bridge member 45 is of a length substantially less than the thickness of the thinnest record to be played so that, when a played record is being removed, the pin 53 will not mar the sound track of the succeeding record.
As shown in Figs. 2 and 7, the depressible pin 21 is provided with a convex surface onv its upper end.
Thus, although pin 53 may be substantially shorter than the thickness of a record to be removed, the record is easily removed and pin 21' is pushed down below the lowerface of the record being removed by the combined weight of the record and player arm. It will readily be under stood that the combined lengths of the pin 53 and the convex end of the pin can be readily arranged topermit records. of a wide range of thickness to be played and removed without adjustment of the machine. The lower face of pin 53 is preferably slightly convex to prevent marringthe top surface of the last record when it is being repeated. When records are placed on the turntable It! for playing, the pin 21 is pulled out to the desired extent and the records are applied to the table with the pin 21 passing through the openings 28 therein.
The player arm, upon the engagement of the pin 53 in the record aperture, sweeps the record from the turntable and the record is deposited in a, record receiver or magazine 56 adjacent the motor board 22, as shown in Figs. 1 and 4. After the record has been deposited in the magazine the player arm is returned to a starting position ny suitable means. Preferably, however, I,
drive the assembly 38 from a drive shaft 51 jour-' naled at one end in the motor board and at the other end in the plate 39 and carrying a gear 58 for enmeshing with a gear 59 carried by and rotating with the shaft 3|, whereby the drive shaft 51 may be driven by or with the turntable. The drive shaft 51-also carries a gear 6| enmeshing with a gear 82 mounted for free rotation on a shaft 63 joumaled in bearings 64 supported in the motor board 22 and the plate 39 for driving the assembly 38. See Figs. 2, 3 and 5.
The gear 62 is rigidly mounted on a sleeve which is rotatably supported on a shoulder 66 of a bushing 61 fixed or keyed on the shaft 63. A notched wheel 68 having a plurality of notches or slots 69 therein at its periphery is also rigidly carried by the sleeve '65 so that it rotates with the gear 62 from which it is separated by a disc 1 I. The notched wheel 68 is connectable in driving relation with the shaft 63 by means of a spring pressed pawl 12 pivoted at 13 to a disc 14 which is keyed or otherwise rigidly fixed to the shaft 63. A cam 15 spaced above the disc 14 by a spacing sleeve 18 on the shaft 63 and a cam 11 located adjacent the plate 39 and engaged by the bushing 61, are also keyed or otherwise rigidly mounted upon the shaft 63, so that, when the end 18 of the pawl 12 engages in a slot 69 of the notched wheel, the shaft-63 is positively driven from the shaft 3|.
The pawl 12 is actuated by a spring 19 on the disc 14, which tends to press the pawl into engagement with the notched wheel 68. It is held out of engagement with the notched wheel 68 while the record is being played by a pin 8| depending from a slidable bar 82. This bar 82 is bifurcated as at 83 to slidingly engage in a groove 84 in the spacing sleeve 18 and has a slot 85 at its other end to slidingly engage an end of a stud or rod 86 upstanding from the plate 39. Intermediate its ends the bar 82 is provided with a second depending pin 81 to which an end of a spring 88 is secured, the other end of the spring being secured to the stud 86. 88 is adapted to retract the bar 82 carrying the pin 8| to release the pawl 12 and clutch the driving gear 62 to the shaft 63 at the end of the playing of a record.
The slidable bar 82 is held in the forward position during the first part of the playing of a record by the engagement of a pin 89 upstanding from the bar with a cam surface 9| of a sector carried by the arm 31, and suitably pro vided in the. sector by an arcuate slot 9| therein, and during the latter part of the playing of the record, by the engagement between a pawl 92 pivoted on the bar 82 and the outer edge 93 of the sector. A spring 95 carried by the bar 82 presses a finger or projection 96 at the side of the pawl 92 opposite the projection 94 against a stop or pin 91 on the bar for holding the projection 94 against the edge 93 of the arm 31 to hold the-lever in the forward position until the record is played. It will readily be understood from Fig. 5, that the pin 91 provides a positive abutment for the finger 96 when the arm 31 is moving in a clockwise direction during the playing of a record.
As the player arm |1 swings toward the center of a record the arm 31 swings with it. If the record is one ending in a spiral groove the slidable bar 82 is held in the forward position until the sector arm 31 has moved to such a position that the projection 94 of the pawl 92 is clear of the outer edge 98 of the sector arm 81, where- The spring 1 upon the slidable bar 82 and pin 8| thereon are retracted by the spring 88, permitting the pawl 12 to enter into driving engagement with the notched wheel 68. The end 93' of the edge 93 of the sector arm 31 is in such position relative 5 to the player arm 11 that the projection 94 of the pawl 92 clears the edge 93 when player arm I1 is substantially at the inner end of the spiral groove of the played record.
If the record being played is of the type shown '1 in Figure l, which is provided with an eccentric groove at the end of the playing portion of the record, the sector arm 31 will oscillate with the player arm |1 after the record is played. The projection 94,00: the pawl 92, is 15 held in engagement with edge 93 of sector arm 31, by the spring 88, and the pin 89, on the slidable bar 82, is in the enlarged portion of the camslot 9|, provided by the cut away cam. surface 98, when this oscillation of the player arm |1 and the sector arm 31 commences. When the sector arm 31 moves counter-clockwise, as viewed in Fig. 5, the surface 93 is in frictional engage-.
ment with the projection 94 of the pawl 92 and turns the pawl 92 clockwise on its pivot against 25 p the tension of the spring 95. As shown in Figure 5, the normal position of the pawl 92 is such that the projection 94 of the pawl 92 is perpendicular tothe tangent at the point of contact between the projection 94 and the edge 93 of 30 the sector arm 31. When the pawl 92 is rotated clockwise, as above described, this condition is destroyed and, due to the spring 88, the slidable bar 82 is retracted until the central portion- 92' of the pawl 92 contacts with the edge 93 of the sector arm 31, thus permitting the pawl 12 to enter into driving engagement with the notched wheel 68, as heretofore described.
When the player arm is returned to the initial playing position, the pin 89 enters the slot 9|. 4D
The contact of the pin with the cam surface 98 forces the bar 82 forwardly to the position to raise the pawl 12 out of engagement with the notched wheel 68. The advancement of the bar 82 enables the pawl 92 to resume the position 45 When the pin enters the 60 the contact of the pawl with the pin 91, such 55 abutment is positive during playing.
The retraction of the bar 82 moves the pin 8| on the bar from its pawl dogging position and the spring 19 turns the pawl 12 about its pivot 13 until the end 18 of this pawl engages in a slot 80 69 of the notched wheel 68, locking the notched wheel to the disc 14 for driving the disc and the shaft 63 carrying the disc. When the shaft 63 begins to rotate at the end of a record, the cams 15 and 11 rotate with it. A roller or cam fol- 5 lower 99 carried on the lever |0| is forced outwardly by a rise "12 in the cam 11, the lever |0| being bifurcated as at I03 to slidingly engage in a groove I04 of the bushing 61 and having its other end pivotally secured to the bell 70 crank lever 42 for actuating the lever 42. The cam follower 9'9 moved .rearwardly by the rise I82 of the cam, causes the lever |0| to turn the bell crank lever about its pivot bolt 43 whereby to raise the player arm through the medium of the link 65 about the player arm pivot 34 until the needle 25 rises substantially above the top record 26. 1
Meanwhile. a roller or cam follower l 03 depend- 5 ing from an arm I06 bifurcated as at I? to slidably engage a groove in a spacing sleeve I106 on the shaft 63 is following a cam dwell I09 of the cam 55, the cam dwell H09 terminating at a cam fall H0 which is engaged by the follower I when the player arm has been raised by the rise 802 of the cam 11. The end of arm I 0t opposite the bifurcated end i0? is pivotally secured to a spring actuated disc Hi as at I I2, rotatably mounted by a hub I I3 on a depending portion of the tone arm support 2i. cured at one end to a stud H5 depending from the motor board 22 and at its other end to a resilient arm or strap H1, which is secured to a stud or projection H6 depending from the disc Hi. This spring maintains the arm I06 forward to keep the cam follower I05 against the cam 75. As shown in Figs. 2 and 5, a sleeve or bushing II8 carried at the lower end of the hollow shaft 36 maintains the strap H1 away from the axis of the disc HI so that it may apply an effective torque upon the pin I I6 when it is in the position shown in Fig. 5.
When the player arm has been raised by the a record, the cam 15 has rotated to the position at which the cam follower 05 is adjacent the cam fall H0. During further rotation of the cams IT and I5, the cam follower 99 rides on a .cam dwell H9 which holds the playing arm in the raised position while the lever I06 is urged forwardly under the action of the spring actuated disc Hi, the follower I05 riding on the cam fall IIO. This rotation of the disc III is communicated to the arm 3'7 by means of a pin I2I projecting downwardly from the disc I I i, the arm 31 being swung thereby in a clockwise direction, as viewed from above. 1
When the follower I05 reaches a cam dwell I22 at'the end of the fall I 60, the playing arm I1 is located centrally of the record. At this position the pin or projection 53 on the lug 09 is just above the depressible pin 2? at the center of the turntable and the cam Tl has rotated until the follower 99 is at the end of the cam dwell II9. Further rotation of the shaft 63 "enables the follower 99 on the lever IM to follow the cam fall I23, the lever IOI being forced forwardly by the weight of the player arm I1 acting through the link and bell crank lever 42 so as to cause the follower '99 to cooperate with the cam IT. The speed of descent of the player arm I! is governed by the degree of taper of cam fall I23 on cam TI and is arranged so that the depressible pin 21 is given a blow to depress same. When the player arm I1 is thus lowered, the pin 53 of the bridge member 49 enters the opening 28 of the topmost record 26 and depresses the pin 21 in the manner described above. After the arm I? has been lowered, the cam follower I05 on the lever I06 clears the cam dwell I22, abruptly releasing the lever I06 and permitting the spring M4 to rotate the disc III, carrying the cam follower I05 past the cam fall I24 towards the cam surface HI.
As the disc I II rotatesunder the action of the spring. I I6, the pin I2! engages the arm 31 and rotates it together with the player arm I1 so as to swing the topmost record toward the magazine 56. During the time the played record is being swept off the turntable the weight of the A spring IE4 is s'e,
cam rise I02 of the cam i1 after the playing of' ter-clockwise movement of disc III.
tone arm is on the record being removed, thus tending to stop the turntable due to the frictional drag between the record being removed and the succeeding record. To reduce this to a minimum the counterbalancing spring I20 carried by the pivot shaft'3fl is provided. The spring i20 also provides that the correct pressure is on the playing needle for properreproduction of the record. During this swinging or record sweeping movement of the playing arm,'the cam follower 99 is opposite or in contact with a short cam dwell 829 of the cam 11. As shown in Fig.
4, the removed record overbalances at the edge.
of the turntable adjacent the magazine 56 and tilts downwardly to slide into the magazine, this being a simple manner of disposal.
After the dwell I29 has passed the cam follower 99, the latter engages a rise I3! which raises the player arm I! to its highest position substantially above any unplayed records on the'turntable. When removing the played record, the
playing arm is swung to its extreme position by the spring N4, the arm being stopped by the engagement of a pin I32, depending from the arm 31, with a resilient or yieldable member I33 mounted on a stud I34 depending from the motor board 22. The resilient friction member I33 is shown as a bifurcated member having arms I35 yieldingly separable bythe pin I32 whereby to stop the playing arm gradually and without shock.
The pin I32 extends through the arm 31 and carries at its upper end a pawl I36 having an end I31 engageable in a notch or slot I38 in the drive disc II I and pressed against the edge of the disc by a spring I39 mounted upon the arm 31. by the spring H6, the notch I38 rotates past or into engagement with the end I31 before the pin I2I engages the arm 3'! to swing the playing arm I36 in the notch I38.
During the initial rotation of the disc III The method of attaching spring II! to the rotating disc III is such as to reduce the power required to tension the spring during the coun- The spring H4 exerts the greatest torque on disc II I when player-arm I I is positioned at*the center of the played record. The proper placement vof stud II6, on disc III, and stud II5, on motor board 22, together with the resilient strap II! and bushing 6, carried at the lower end of shaft 36, combine to. provide this result. With the player arm I1 over the center of the-record the pin II 6 is in such position that resilient strap I I1 is at a tangent to the radius on which pin II6 travels. As the player arm is moved towards the initial playing position the efiective radius i board'22.
ly from an adjustably mounted ring I45 engages the pawl I36 and disengages the end I31 of the pawl from the notch I38 in the disc III, thus terminating the return of the player arm. During the return of the player arm, the arm 31 cooperates with the pin 89 and pawl 92 in the manner described above to move the bar 82 into its forward position and' bring the pin 8| into a position to engage the pawl 12 when it arrives at its initial location after a complete revolution of the shaft 63. After the follower I85 has passed over the cam rise I42 and rests upon the cam dwell I89; which corresponds with the maximum rotation of the disc III, the follower 89 travels 15 over a cam fall I46 towards a cam dwell I41,
thus lowering the arm I1 until the stylus coopcrates with the track of the record and playing is resumed. At this point of time or immediately-thereafter, the pawl 12 has completedone revolution around the shaft 63 and comes into engagement with the pin 8I of the bar 82, which, as indicated above, has alreadyv been moved forward by the arm. 31. The engagement between the pin 8I and the pawl 12 interrupts the drive 'of the cams 15 and 11 until, at the end of the playing of a record, the pawl 92 is released to permit the bar 82 to move once more into its retracted position.
The ring I is provided with a hub I49 which enters an opening in the motor board 22 around nut I58 and may readily be adjusted to desired position in the slot I53. It will readily be understood that adjustment of the pin I52 changes the position of the pin I43 and thus controls the returned position of the arm 31 to adapt it for records of desired size. The depressibe center pin 21 is of such length, relative to the length of bore 28 in shaft 3|, that it projects above the surface of the turntable, substantially the thick- 5 ness of a record, when in its extreme lowest position. Thus, although the pin 53 comes down on the pin 21, it cannot depress it below the last record. Thus the last record is not removed but is played repeatedly until the machine is stopped. If desired, the cam dwell I29 may be'located ment of the player arm.
The turntable may be driven continuously at substantially uniform speed by any suitable motor. An electric motor I94, preferably asynchronous motor, where alternating current is 5 available, is advantagebusly'employed. The motor I84 may be mounted on the motor board 22,
and may be provided with a pinion I95 which meshes with a gear I86 carriedby the'turntable. The current for the motor may be controlled by the switch I91 and when asynchronous motor is employed, it may be conveniently started by manually rotating the turntable up to the normal or a greater speed.
In the modification shown in Figs. 9 and 10, the
75 general phonograph structure andrecord chang- The pin I52 is engaged by a thumb ing mechanism are similar in construction and operation, and similar or identical parts are designated by the same reference numerals employed in Figs. 1 to 8 inclusive. In this modification the movements of the player arm to the center of the record and during the removal thereof, are positively effected by the cam 15, the return of the player arm to initial playing position being efiectedby a spring which is energized during the removal of the record.
In this modification the outer end of the arm I86 is pivoted at I54 to the arm 31. The support member 2I is preferably hollow, its lower end being closed by a plate I 68 which is provided with a central hub I63 which provides a bearing for the shaft 36 and for a hub I64 of an arm I51 which is rotatably supported by means of the collar of the arm 31, which is rigidly mounted on the shaft 36. A spring I55 is located around the hub I64, one end I56 being secured to the motor board 22, and the other end of the spring engaging the arm I 51 so as to tend to rotate same in the counter-clockwise direction as viewed in Fig. 10., The arm I51 carries a depending pin I I58 which lies in the path of the arm 31 and is adapted to cooperate therewith in the manner hereinafter described.
The arm I 51 is adapted to abut upon a pin I59 which may, if desired, be adjustable in position. For example, the pin I59 may be supported in a slot I62 in the motor board 22, and have a threaded upper, portion which extends through the slot and is engaged by a thumb nut I6I on the upper side of the motor board 22. It will be readily understood that the thumb nut I6I may be unscrewed and the pin I59 adjusted in desired position in the slot I62 so as to adjust the movement of the arm I51 and the momentum which it supplies to the returning arm I1 and associated parts.
As shown in Fig. 10, means, are provided for the adjustable positioning of the arm I1 so as to accommodate it for playing records of desired size. This mechanism comprises a sector I65 which is rotatably carried by a pin I66 adjacent the under side of the motor board 22. The pin I66 extends through a slot I61 in the motor board and is adapted to be secured in desired position therein by means of a thumb nut I68. The other end of the sector I65 is bifurcated to provide a relatively long arm I69 and a relatively short arm I18, a recess I1I being provided therebetw'een. The arm I18 is provided with a projecting tooth or catch I12 which overhangs the recess I1I. Adjacent the catch I12 the outer surface of the arm I18 is bevelled asshown at I13 for a purpose which will hereinafter appear. The arm I 65' carries stops I14 which limit the movement of the end of an arm I15 pivotally connected at I16 to a radial arm I11 carried by the opposite ,end of 'the sector I65. A weak spring I18 is provided which normally presses the edge I19 of the arm I15 outwardly to a position beyond the catch I12. The sector. I65 tends to move in the clockwise direction, as'viewed in Fig. 10, under theinfluence of a spring I88, which is secured to the arm I11 and to the motor board 22. The arm I69 of the sector I65 is normally held by this spring in engagement with a vertical rod IBI rigidly secured to the lever. IN. A projection I82 mounted on one of the sectors of the arm '31 is adapted to cooperate with the catch I12 and the face I 19 of the arm I15. A spring 285 suitably secured to the bell crank lever 42 and to the plate 38 causes the cam follower 88 to follow the cam 11. This spring is sumciently strong to efiect the release of the catch I72 against the action of the spring I89.
The configuration of the cams 15 and 11 difiers considerably from that described in connection with the modification first described. The nature of these cams will more readily be understood from the operation of this modifica-- ticn, which will hereinafter be described.
In this modification, the motor I9d, during the removal of a record has a considerable load imposed upon it. At this period the motor rotates the turntable, moves the player arm I1 to move the record over the turntable, and energizes the spring I55. It is, therefore, preferred to provide the motor with additional power at this time. This may conveniently be done by providing a suitable resistance I98 in series with the winding I99 of the motor I93, which resistance is automatically shunted when the increase of power is needed. The shunt circuit comprises a pair of conductors 299 connected by a switch 2M which is controlled by the movement of part of the mechanism. The switch may suitably be controlled by the movement of the arm I51 an may comprise a pair of resilient contact arms 292 and 293 tending to contact with each oth'er. The contact arms may be mounted on a plate 294 carried by, and movable with the pin I59. The contact arm 292 is slightly longer than the contact arm 293 so that it is engaged by the arm I51, when it abuts against the pin I59, and breaks the shunt circuit. When the arm I51 begins to move from this position the contact arm 292 makes contact with the contact arm 293 and the resistance I98 is shunted and the power of the motor is increased until the arm I51 returnsto its position in abutment with the pin I59. The portion of the pin I59 within the slot I52 is of square cross-section to maintain the plate 294 and the contact arms in operative position.
The position of parts shown in Fig. 10 corresponds to the commencement of the playing of a record, the catch I12'having been forced clear of the projection I82, arm I1 having been lowered into its initial playing position and being about to be brought into cooperation with the track of the record by the arm I15, and the arm I51 being in contact with the abutment I59- so that the shunt circuit is broken and normal power is supplied to the motor I94. The bar 82 is in its forward position, and the pawl 12 is thereby held out of engagement with the notched wheel 69 so that the cams 15 and 11 are stationary. As the playing progresses, the arm 31 moves in a clockwise direction as seen in Fig. 10, which movement is progressive until the pawl 12 is released and the cams are put into rotation in the manner described above.
During the playing, the lever I95 has been drawn rearwardly somewhat by the arm 31 and the cam follower I95 is out of contact with the cam 15. When the cam 11 begins to rotate the cam follower 99 rides over a cam rise I83 on the cam 11 which raises the player arm I1. Thereafter, the cam follower I95 is engaged by a cam rise I84 on the cam-15 and the arm 31 is rotated thereby to bring the elevated arm I1 into position I over the center of the records 26, as shown in Fig. 9. As the player arm is put into movement by the cam 15, or shortly thereafter, the arm 31 contacts with the pin I58 of the arm- I51 and moves it slightly, thereby closing the switch 2M and shunting the resistance I98 so as to increase scribed. Mter this condition is established, the
aao'moc the power of the motor as above described. While the arm I1 is being moved across the record, the cam follower 99 rides over a. cam dwell I85 which maintains the arm. I'I elevated. After the arm I! has arrived at the center of the record, the cam follower 99 passes over a cam fall I96 which permits the arm I1 to fall to bring the pin 53 into the opening 23 of the top record, depressing the pin 21 in the manner above decam followers 99 and I riding'on cam dwells I91 and IE9 respectively, the cam follower I95 rides over a long gradual cam rise I89 which translates the-arm I1 so as to remove the topirecord and discharge it into the magazine 56. During this movement the arm 31 is rotated through a wide angle so as to contact with the pin I58 and move the arm I51 to its extreme position, thereby coiling or energizing the spring I 55. After the record has been translated suf; ficiently to enable it to fall into the magazine 55, the cam follower 99 enters into contact with the cam rise I98 which has the eifect of elevating the arm H to its highest position. The subsequent movement. of the arm I1 into its extreme position is effected with the arm thus ele- "vated. This elevation corresponds to the contact of the cam follower 99 with the cam dwell I9I. At the end of the cam rise I89 the cam 15 is provided with a radial fall I92 so that the return of the arm I1 is rapidly effected through the action of the spring I55 upon the. arm I51, which in turn acts through the pin I58 upon the arm 31. When the arm I51 is stopped by contact with the pin I59, the arm I1 and asso-' ciated parts have sumcient momentum to carry them beyond their. initial playing position. As indicated above, this momentum may, if desured, be adjusted by the position of the pin I59 in the slot I52. The arm 31 consequently rotates in a counter-clockwise direction, as viewed in Fig. 10 until the projection I82, carried thereby, contacts with the beveled surface I13 of the sector I85 so as to displace same against the action of the spring I80 to permit the projection to enter the recess Hi. It will be understood that the projection I82 also contacts with the face I19 of the arm I15 to enter the recess. The spring IBII causes the sector to move back so as to bring the catch I12 into the path of the 1 projection I 82.. The arm I15 under the action of its spring I18 forces the projection I82 into contact with the catch I 12 so as to locate the arm I1 in a predetermined position, which is such that the needle is above' a point slightly outside the commencementof the track on the record. It will be readily understood that this position is adjustable by means of the thumb screw I98 so that the machi'ne may be adapted with great ease for the playing of records of different sizes.
After the cam follower I 95 moves over the cam i fall I92, the cam follower 99 passes over a cam fall I93 which permits the player arm I1 to descend to bring the needle 25 into contact with the record. The descent of the arm I1 depends I upon the number of records which are located upon the turntable I9. The cam follower 99 moves over the cam fall I93, being caused to follow same by the spring 295, until the rod I8I moves the sector I65 against the tension of the spring I80. Consequently, when the cam follower 99 approaches the endof thecam fall I93, the projection I92 of the arm 3-1 is released by the catch, I12 and the player arm is pressed gently by the arm'fli, under the action of the 7 spring I", into engagement with the track of the record. It will be understood that during the return swing of the player arm back to initial playing position, the arm 31 engages with the pin 89 and pawl 92,.to move the bar 82 into its for- 'ward position. Consequently, when the pawl 12 has completed one revolution, it is engaged by thepin M to disconnect the driving connection of the cams. This occurs after the cam follower I9 has moved over the cam fall I93.
' In this modification of the invention also, the cam fall I93 may, if desired, lead the cam follower 99 to a position somewhat closer to the center of the shaft 63 than it has when it moves over the cam dwell I88, to permit the last rec-.
ord to be played repeatedly, the pin 53 not being maintained out of contact with its surface.
Although the invention has been described in connection with the specific details of the preferred embodiments thereof, it must be understood that such details are not intended to be limitative of the invention, except insofar as set forth in the accompanying claims.
I claim:
1. In a phonograph, in combination, a rotatable turntable, a playerarm, means carried by the player'arm for engaging a record in playing relation, means carried by the player arm for engaging the record to remove same from the turntable, and means for actuating the arm for removing the record from the turntable.
I 2. In a phonograph, in combination, a rotatable turntable, an arm having means to engage a record thereon to remove same, means for raising and lowering said arm, and a spring for moving the arm transversely to remove the record, said means and the turntable being operatively con- I nected.
3. In a phonograph, in combination, a rotatable turntable, an arm having. means to engage a record thereon to remove same, spring means adapted to move the. arm transversely in one direction, and means for alternately raising and lowering said arm and moving it transversely in the opposite direction, said arm being adapted to move over the turntable in its lowered position during recordremoval so as to cause the record to slide upon the surface therebeneath. Y
4. In a phonograph, in combination, a rotatable turntable, an arm having means to engage a record thereon to remove same, spring means adapted to move the arm transversely to remove the record from the turntable, and means for raising and lowering said arm and moving it transversely in the opposite direction and reenergizing the spring means.
'- 5. Ina phonograph, in combination, a rotatable turntable, an arm having means to engage a record thereon to remove same, means for alternately raising and lowering said arm and movplayer arm for engaging the record to remove same, spring means adapted to move the arm transversely in one direction, and means for al-' ternately raising and lowering said arm andmoving it transversely in the opposite direction;
player arm transversely to '7. In a phonograph, in combination, a rotatable turntable, a player arm, means carried by the player arm for engaging a record in playing relation, means carried by the player arm for engaging the record to remove same, spring means adapted to move 'the arm transversely to remove the record from the turntable, and means for raising and lowering said arm'and moving it transversely in the opposite direction and reenergizing the spring means.
8. In a phonograph, in combination, a rotatable turntable, a player arm, means carried by the player arm for engaging a record in playing re lation, means carried by the player arm for engaging the record to remove same, means for raising and lowering said arm and moving it transversely to remove the record from the table, and spring means adapted to be energized by said transverse movement for returning the arm to initial position.
9. In a phonograph, in combination, a turntable, a player arm provided with a sound reproducing element, and operative means for actuating the player arm to cause it to engage a record on the turntable, move the arm away from the engaging position to remove the record and return the arm to initial playing position.
10. In a phonograph,in combination, a player arm having a needle adapted to cooperate with the track of a record, 9. depending member mounted on the player arm, means on said depending member adapted -to-enter the record opening to engage the record,'and means adapted to swing said player arm transversely to move said record bodily.
11. In a phonograph, in combination, a player arm having a needle adapted to cooperate with the track of a record, a member pivotally supported on the arm and adaptedto hang below the needle, said member being adapted to be moved out of the way of the needle by the rotation of the record when the arm is lowered in a playing position of the arm, means carried by said member adapted to enter the, opening of a record when the arm is lowered in the central position thereof, and means adapted to swing said player arm transversely to move said rec- 'ord bodily.
12. In a phonograph, in combination, a player arm having a needle adapted to cooperate with the track of a record, a member pivotally supported on the arm and adapted to hang below the needle, said member being adapted to be 'ord when the arm *is lowered in the central position thereof, yielding means carried by the depending member .to contact with the recordduring playing, and means adapted to swing said move said record bodily. v
' 13. In av phonograph, in combination; a tumtable, a player arm, operative means for removing a played record from the turntable, an arm rotatable with the player arm, and provided with a pair of arcuate surfaces, one of which is cut away to provide a cam surface, a movable element controlling the drive of said operative means, means carried by said element adapted to cooperate with the cam surface and associated arcuate surface, said means being adapted to engage the cam surface when the player arm is returned to initial playing position to move the element 5 into drive disconnecting position, and a pivoted pawl carried on said element adapted to engage the other arcuate surface of the arm and maintain said position until the end of the playing of the record.
14. In a phonograph, in combination, a turntable, a player arm, operative means for removing a played record from the turntable, an arm rotatable with the player arm and provided with an arcuate surface, a movable element controlling the drive of said operative means, and a pawl carried on said element adapted to engage said surface to maintain the element in drive disconnecting position during playing of a record, said pawl being adapted to be released by reverse movement of the arm to permit the element to move into drive connecting position.
15. In a phonograph, in combination, a-turntable adapted to receive a plurality of superimposed records, a player arm adapted to cooperate with the topmost record in playing relation, a member carried by the player arm, a magazine located laterally of, and below the turntable and adapted to receive played records, and operative means adapted to actuate the player arm after playing a record, to elevate same, move it to the center of the record, lower it so that said member carried thereby enters the central opening of the topmost record, move it laterally to bring said record into a position where it may move into the magazine, elevate it, return it to initial playing position and lower it into playing relation with the next record.
16. In a phonograph, in combination, a turntable, a player arm provided with a sound reproducing element, record engaging means carried by said arm, means for actuating the arm to cause said record engaging means to sweep records from the turntable, means to return the arm to initial playing position, and adjustable means for arresting the arm in diiierent positions to accommodate the phonograph for playing records of difierent sizes.
' 17. In a phonograph, in combination, a turntable, a motor for rotating the turntable, a player arm, means including resilient means for swinging the arm from final playing position back to a position adjacent initial playing position, a catch for engaging a member swingable with the arm and holding the arm in said position adjacent the initial playing position, and means driven from the motor for controlling the release of the arm from the catch.
18. In a phonograph, in combination, a turntable, a player arm, resilient means for swinging the arm from flnal playing position to initial playing position, means for elevating and lowering the arm, a catch for engaging a member swingable with the arm, to arrest the swung arm to hold the same adjacent initial playing position, and means associated with the means for lowering the arm for releasing the arm from the catch, said catch being mounted to permit adjustment to adapt the phonograph to play records of difl'erent sizes. 19. In a phonograph, in combination, a turn table, a player arm, resilient means for swinging the arm to initial playing position, means for elevating and lowering the arm, a catch for engaging a member swingable with the arm, to arrest the swung arm and hold same adjacent initial playingposition, means associated with the means for lowering the arm for releasing the arm from the catch, and resilient means associated with the arm to imparts slight motion to the arm when released so as to push the arm towards the track of the record, said catch being mounted to permit adjustment to adapt the phonograph to play records of different sizes.
20. In a. phonograph, in combination, a tumtable, a player arm, a spring for returning the player arm to initial playing position, operative means intermittently operated for removing aplayed record from the turntable and compressing said spring motor means for driving the turntable and actuating said intermittently operative means, and means associated with said operative means =for increasing the power of the motor means during the record removing operation.
21. In a phonograph, in combination, a turntable, a synchronous electric motor for driving same, a resistance in series with the winding of the motor, a player arm, a spring for returning the player arm to initial playing position, operareadily movable in said bore and maintaining a position therein to which it may be moved.
23. In a phonograph, in combination, a turntable, a pin frictionally held in a bore therein and adapted to project above the surface of the turn-- table to pass through the openings of a plurality of records placed thereonand a record removing arm having a pin, means for actuating the record removing arm to apply its pin to the first said pin to depress same, means limiting said depression to approximately the thickness of a record, means for swinging the armto remove the record from the turntable, said first mentioned being readily movable in said bore and maintaining a position therein to which it may be moved. 24. In a phonograph, in combination, a turn-- table, a centering'pin adapted to pass through i the openings in records placed thereon, said pin being depressible from above, a record removing member, means for actuating said member to cause .it to enter the opening of a record and depress the pin below ,the upper surface'thereof,
means associated with the record removing member adapted to contact with the surface of said record to limit its entrance into the record opening to substantially the thickness of the top record, said pin being inclined at its upper end to permit the record to be slid ofi'the turntable, and means formoving the record moving member to slide the record off.
25. In a phonograph, in combination, a table for supporting records, a centering pin adapted to pass through the openings in records placed thereon, said pin being depressible, and frictional means for maintaining the pin in a plurality of positions.
26. In a phonograph, in combination, a table for supporting records, a centering pin having a convex upper end adapted to pass through the openingsin said records, said pin being depressible, a. record removing pin, means for causing the-.recordremoving pingto enter into a;record opening and depress the dep'ressible pin, said record removing pin having a shoulder adapted to engage the upper surface of said record and limit table. being adapted to receive a stack of recordsh'aving central openings, said turntable being mounted for rotation in a fixed plane during the playing oi. the series of records stacked thereupon, a pin in the center of the turntable, said pin being depressible into the boreof the turntable for substantially the thickness of the stack and being adapted to pass through the openings in the records, and a depressing pin, means actuating the depressing pin to cause it to move above the turntable andstack of records, and enter the opening in the uppermost record, means for limiting the entrance of the depressing pin into the opening in the uppermost record an amount substantially equal to the thickness of the record, depressing said depressible pin so as to release only the uppermost record, and to move sideways thereby removing the ,eleased record from the turntable.
28. In an automatic record changing phono-' graph, in combination, a rotatable turntable adapted to carry a series of superimposed records,
turntable and remove it therefrom, leaving the next lower record ready. to be played by said needle.
29. In a phonograph, in combination, a tumtable, a centering. pin adapted to pass through openings in records placed thereon, said pin being depressible from above, a player arm adapted to cooperate. with a :record on the turntable to reproduce same, and means carried by the player arm adapted to depress the pin.
30. In an automatic phonograph, in combination, a turntable, a motor for driving same, record changing mechanism driven intermittently from said motor, clutch means for connecting said motor to said record changing mechanism, a player arm, means having a smooth arcuate surface moving therewith, a movable element controlling said clutch mechanism, and a pawl carried by said element adapted") engage said surface to maintain said clutch means disconnected, said pawl being adapted to be actuated by reversal of motion of said surface and by passing off said surface to effect engagement of said clutch mechanism.
. 31. In an automatic phonograph, in combination, a turntable having a spindle provided with an axial bore, a depressible pin in the bore of the turntable adapted to center a stack of records thereon, said pin being adapted to project through the complete stack of records and being mounted to permit it to be depressed substantially the thickness of the stack, said turntable being mounted for rotation in a fixed plane during theplaying of a stack of records, an arm adapted to move above said record stack and downwardly through said stack position into close propinquity to the turntable, a magazine located laterally of, and below the turntable and adapted to receive played records, operative means for actuating said arm to cause it to move to depress said pin to progressively lower positions, engage the topmost record of said stack and slide itofl, while all the records 'therebeneath are held centered by said pin, to raise said arm to a definite height and return same, and means controlling the operative means for repeated operation upon the record next below the topmost record after said next record has been played.
32. A phonograph comprising a sound reproducing element, a turntable adapted to support a stack of records, a motor for rotating the turntable, a depressible pin in said turntable projecting through the center holes of said records, an
arm carrying a depressing pin adapted to depress said depressible pin, said arm being. adapted to move downwardly through substantially the thickness of the stack, means associated with the depressing pin for engaging the topmost record to limit the entry of the depressing pin to a dis-- tance substantially the thickness of a record, means for swinging said arm transversely of the turntable while in its lowermost position to slide off said topmost record, a receptacle adjacent the turntable to receive the removed records, means for raising the arm to a definite height and returning it to engage the next record, and means controlled by the position of said sound reproducing element with respect to the uppermost record for initiating the record removing movements of said arm.
33. In an automatic phonograph, in combination, a record support, a member movable thereabove, a reproducer carried thereby and means for removing a played record from the support carried by said movable member.
34. In an automatic phonograph, in combination, a motor, a turntable operated thereby, a depressible pin adapted to center a stack of records on the turntable, an arm adapted to swing horizontally above said turntable, means for swinging said arm vertically to cause it to depress the depressible pin and engage the center opening of the topmost record of said stack, means driven by said motor for swinging said arm to slide off said topmost record from said turntable and means energized by the swinging of said am for returning said arm towards its initial position.
35. In a phonograph, in combination, a turntable adapted to support a stack of records, said turntable having a spindle provided with an axial bore, a depressible center pin in said turntable bore adapted to pass through the holes in the records of said stack and to be depressed step by step until its upper end is located adjacent the turntable, means above the turntable for depressing said pin, means associated with the depressing means adapted to engage the topmost record and limit the depression of the pin to the level of the lower surface of said record, all the records below the top record being held centered by the depressible pin, and means for sliding the top record oil the stack.
36. In a phonograph, in combination, a turntable adapted to support a stack of records thereon, said, turntable having a spindle provided with an axial bore, a depressible centering pin withinsaid bore and adapted to extend upwardly from the turntable through the central openings ofthe records of said stack and to be depressed step by step until its upper end is located adjacent the turntable, a pin movable abpve the stack of records, means causing said movable pin to enter the opening of the topmost record and depress the depressible pin step by step to free the topmost records therefrom, and means for moving said movable pin transversely while in said last mentioned position to cause the topmost rec-" ord to slide ofi over the surface therebeneath and thereby eifect the removal of the topmost record from the stack.
37. In an automatic phonograph, in combination, record supporting means, a depressible pin for centering a stack of records on said supporting means, a member including a depressing pin mounted for movement over said record supporting means, and actuating means for said member for causing its pin to depress said deprescausing its pin to enter the hole in the topmost record, depress said depressible pin and move laterally thereby sliding said record oft said stack, and means associated with said depressing pin ior limiting its entry and the depressing of said depressible pin to any substantial degree below the topmost record, said depressing pin having a convex lower end.
39. In a phonograph, in combination, a turntable adapted to support a stack of records, said turntable having a spindle provided with an axial bore, a depressible centering pin located in said bore extending upwardly from the turntable through the central openings of said records, an arm movable above said stack of records, a pin carried by said arm, means for moving said arm downwardly through progressively greater distances causing last said pin to enter the opening of the topmost record and depress the depressible pin to free the topmost record therefrom, and means for moving said arm transversely to cause the topmost record to slide over the surface therebeneath and thereby eiiect the removal of the topmost record from the stack.
40. In a phonograph, in combination, a sound reproducing element, a turntable adapted to support a stack of records, a depressible centering pin extending upwardly from the turntable through the central openings of said records, an
arm movable above said stack of records, a pin carried by said arm, means causing said last mentioned pin to enter the opening of the topmost record and depress the depressible pin to free the topmost record therefrom, means for moving said arm transversely to cause the topmost record to slide over the surface therebeneath and thereby effect the removal of the topmost record from the stack, and means operable by the movement of the sound reproducing element into final playing position for initiating the record removal movements of said am, at least one of said pins having a convex end.
41. In a phonograph, in combination, a turntable adapted to support a stack of records, a depressible center pin in said turntable passing through the holes in said records, depressing means above the turntable for depressing said depressible pin just enough to free the top record herefrom, all of the records below the top record being held in place by the depressible pin, means for removing the top record, and means for means for swinging said depressing means to slide off the topmost record, and meansfor elevating the depressing means free of said record to permit said record to move laterally.
43. In a phonograph, in combination, a turntable adapted to support a stack of records, said turntable having a'spindle'provided with an axial I bore, a depressible center pin in said bore passing through the holes in said records, a record removing arm pivotally mounted to swing in a vertical plane through the record stack position, means carried by said arm for depressing the pin and means associated with the depressing means adapted to, engage the top record and limit the depressioiidpf the. pin to the level of the lower surface of said record, all of the records below the top record being held in place by the depressible 44. In a phonograph, in combination, a turntable adapted to support a stack of records, said turntable having a spindle provided with an axial bore, a depressible center pin in said-bore passing through the holes in said records, a record removing arm pivotally mounted to swing. in a verticalplane through the record stack position, means carried by said arm adapted to enter the opening of the top record and depress the depressible pin, and means carried by said arm adapted to engage the top record and limit the depressing movement of the arm to free only the-top record from the pin, the records below the top record being held in place by the depressible pin.
45. In a phonograph, in combination, a turntable adapted to support a stack of'records, said turntable having a spindle provided with an axial bore, a depressible center pin in said bore passing through the holes in said records, a record removing arm pivotally mounted to swing in a vertical plane through the record stack position and pivotally mounted to swing in a horizontal plane, means carried by said arm for depressing the pin just enough to free the top record therefrom, the records below the top record being. held by the depressible pin, and means for causing the arm to swing horizontally to slide said top record off the stack.
46. In a phonograph, in combination, a turntable adapted to support a stack of records, said turntable having a spindle provided with an axial bore, a depressible center pin in said bore passing through the holes in said records, a record removing arm pivotally mounted to swing in a vertical plane through the record stack position and pivotally mounted to swing in a horizontal plane, means carried by said arm adapted to enter the opening of the top record and depress the depressible pin, means carried by said arm adapted to engage the top record and limit the depressing movement of the arm to free only the top record from the pin, the records below the top record being held by the depressible pin, and means for causing the arm to swing horizontally to slide the top record oil the stack.
47. In a phonograph, in combination, a turntable, said turntable being adapted to support a stack of records and arranged to rotate in a fixed plane during thesucce'ssive playing of recor'ds of the stack, a depressible center pin for said turntable passing through the holes in said records and adapted to be depressed through a distance substantially equal to the thickness of the stack, a. record-removing member extending above said turntable, means adapted to actuate said member to cause it to depress the pin, and means associated with the depressing means adapted to engage the topmost record and limit the depression of the pin to the level of the lower surface of said record, establishing for .the top record a condition of freedom to slide with relation to the records therebeneath, the last said records being held by the depressible pin against sliding.
48. In a phonograph, in combination, a turntable, said turntable being adapted to support a stack of records and arranged to. rotate in a fixed plane during the successive playing of the stack of 'records,a depressible center pin for said turntable passing through the holes in said records and adapted to be depressed to a position close to the turntable substantially through stack position, arecord-r-emoving arm extending above said turntable and operable to remove records from the turntable at various levels, a depressing pin carried by said arm, and means. adapted to actuate said arm to cause said depressing pin to depress the depressible pin, means carried by said arm limiting said depression so as to free the top record only from the depressible pin, the records below the top record being held by the depressible pin.
49. In a phonograph, in combination, a turntable, said turntable being adapted to support a stack of records and arranged to rotate in a fixed plane during the successive playing of the stack 1 of records, a depressible center pin for said turntable passing through the holes in said records and adapted to be depressed to a position close to the turntable substantially through stack position, a record-removing arm extending above said turntable and operable to remove records from the turntable at various levels, means adapted to actuate said arm to cause it to depress the pin just enough to free the top record, the records below the top record being held by the depressible pin, and means for moving said arm horizontally to slide off said top record.
50. In a phonograph, in combination, a turntable having a spindle provided with an. axial bore, said turntable being adapted to support a stack of records and arranged to rotate in a fixed plane during the successive playing "of the stack of records, a center-pin in said bore of said turntable passing through the holes in said rec- I ords and adapted to be depressed to a position close to the turntable substantially through stack position, a record-removing arm extending above said turntableand operable to remove records from the turntable at various levels, a depressing pin carried by said arm, means adapted to actuate said arm to cause said depressing pin to depress the depressible pin, means carried by said arm limiting said depression so as to free the top record, the records below the top record being held by the depressible pin, and means for moving said arm horizontally to slide off said top record.
51. In a phonograph, in combination, a tumtable adapted to receive a stack of records, a depressible pin for said turntable adapted to project upwardly through the holes in said records, a record-removing arm mounted to swing vertically and horizontally, means for elevating the arm, a depressing member on said arm adapted to engage said depressible pin and depress same within the opening of the top record,
means on said arm for engaging the surface of a record-removing arm adapted to swing vertically and horizontally, means for elevating the arm, a depressing member on said arm adapted to engage said depressible pin and depress same within the opening of the top record, means on said arm for engaging the surface of the top record whereby the depressing member frees the top record only, the remaining records being held by said depressible pin, and means operative when said arm is in a position above the depressible pin to allow same to descend under the influence of gravity whereby the depressing member strikes the depressible pin with a forcible impact in order to effect its depression, the arm being adapted to be arrested at various levels by. said engagement of the record engaging means on said arm against the surface of the top record.
- 53. In a phonograph, in combination, a turntable for supporting a stack of records, a depressiblejcentering'pin passing through holes in the records, a depressing pin movable above said turntable, means for causing said depressing pin to depress said depressible pin and engage the ing the successive playing of said records for depressing the pin in a series of steps through a distance substantially equal to the thickness of said stack of records, and means associated with said first named means for'limiting the depression of said pin at each step substantially to the level of the underside of the topmost'record.
55. A phonograph comprising a turntable adapted to receive a stack of records, said turntable having a spindle provided with an axial bore, a depressible pin mounted in said bore and adapted to project upwardly through the open-,- ings in said records, record removing means being mounted for movement above said stack tending to fall downwardly through the space occupied by said stack to depress the pin nearly to the turntable, and means on said record removing means adapted to engage the top record to limit the depression of the pin to a position in which its upper end is substantially in the plane of the underside of thetopmost record.
56. A phonograph comprising a turntable,
adapted to receive a stack of records, said turntable having a spindle provided with an axial adapted to project upwardly through the 'openings in said records, a record removing arm movable above said records, means tending to cause said arm to descend by gravity in the path of said pin through the space occupied by said stack to a position adjacent the turntable, said arm being capable of being arrested at a series of higher positions by the then topmost record of the stack, and means carried by said am for depressing the pin to a position in which its upper end is substantially in the plane of the underside of the topmost record. a i 57, In a record changing phonograph, in combination, a support fora stack of records, a centering pin passing through holes in said records, a depressing pin mounted for movement to a plurality 'of record levels for depressing said centering pin, means associated with the depressing pin adapted to engage the surface of the topmost record to bring the upper end of the centering A tending through said records, said bore and pin pin'substantially to the level of the underside of the topmost record, and means resisting the movement of said centering pin below said posi-.
tion. 7
'58. In a record changing phonograph, a turntable for supporting a stack of records, a centering pin slidably mounted in a bore in said tumtable and passing through holes in said records, a depressing pin, an abutment associated with said depressing pin, said abutment being spaced inwardly of the free end of said depressing pin a distance substantially equal to the thickness of a record; means mounting said depressing pin and abutment for movement to a plurality of record levels for engaging the uppermost record of the stack and depressing said centering pin to bring its upper end substantially to the level of the underside of the topmost record, and means associated with said centering pin for resisting the movement of said centering pin below said position.
59. In a phonograph, in combination, a turntable adapted to support a stack of records, said turntable having a spindle provided with an axial bore, a depressible pin located in said bore exbeing correlated to permit the pin to be depressed into said bore to free at least all the records of the stack except the lowermost, means above said turntable, to depress said pin and having a limited entry into the opening of the top record for 7 causing said record to slide 01f the stack.
60. In a. phonograph, in combination, a turntable, a player arm, means including resilient means for swinging the arm fromfinal playing position back to a position adjacent initial playing position, a catch for engaging a member swingable with said arm'and holding the arm in.
said position adjacent the initial playing position, motor'means for rotating the turntable and energizing said resilient means, and means actuated by said motor means for release of the arm from said cat 61. In a phonograph, in combination, a tumtable, a player arm, means including resilient means for swinging the arm in one direction from final playing position back to a position adjacent initial playing position, a catch for engaging a member swingable with the arm and holding the arm in said position adjacent initial playing position, motor means for rotating the turntable controlling the Y and energizing said resilient means, means actu ated by said motor means for controlling the release of the arm from said catch, and means cooperating with the arm for biasing the arm in the opposite direction into initial playing position whereby the arm is pushed towards the track of the record when the armis released from the catch.
62. In a. phonograph, in combination, a turntable, a player arm, means including resilient -means' for swinging the arm to a position adjacent initial playing position, means mounting the playing position, means associated with the' means for eiiecting separation and approach between the arm-and turntable for releasing the arm from thecatch, biasing means for imparting a slight motion to the member when released 7 so as to push the arm towards the track oi. the
- record, and motor means for rotating the turntable, energizing said resilientpmeans, and operating the means for eflecting separation and approach between the arm and turntable.
- EDWARD F. ANDREWS.
a5 arm and turntable for relative vertical movex
US494560A 1930-11-10 1930-11-10 Phonograph Expired - Lifetime US2207706A (en)

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US494560A US2207706A (en) 1930-11-10 1930-11-10 Phonograph
GB31182/31A GB392173A (en) 1930-11-10 1931-11-10 Improvements in or relating to gramophones
DEA64069D DE608508C (en) 1930-11-10 1931-11-11 Magazine speaking machine to automatically play several records one after the other

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541072A (en) * 1942-01-03 1951-02-13 Farnsworth Res Corp Automatic record changer
US2583622A (en) * 1947-04-05 1952-01-29 William H Zimmerman Brush for phonograph needles
US2783049A (en) * 1949-12-23 1957-02-26 Schulmerich Electronics Inc Automatic record player
US2878024A (en) * 1952-04-29 1959-03-17 Blain Albert Record playing devices
US4198056A (en) * 1978-06-01 1980-04-15 Cooper Tristan P Protective device for record player
CN118368574A (en) * 2024-06-20 2024-07-19 三明市汇泽电子有限公司 High-definition full-frequency sound expander

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541072A (en) * 1942-01-03 1951-02-13 Farnsworth Res Corp Automatic record changer
US2583622A (en) * 1947-04-05 1952-01-29 William H Zimmerman Brush for phonograph needles
US2783049A (en) * 1949-12-23 1957-02-26 Schulmerich Electronics Inc Automatic record player
US2878024A (en) * 1952-04-29 1959-03-17 Blain Albert Record playing devices
US4198056A (en) * 1978-06-01 1980-04-15 Cooper Tristan P Protective device for record player
CN118368574A (en) * 2024-06-20 2024-07-19 三明市汇泽电子有限公司 High-definition full-frequency sound expander

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DE608508C (en) 1935-01-28
GB392173A (en) 1933-05-10

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