US2184365A - Phonograph record shaving machine - Google Patents

Description

Dec. 26, 1939.

R. M, SOMERS PHONOGBAPH RECORD SHAVING MACHINE Filed June 25, 1938 3 Sheets-Sheet 1 INVENTOR fzcharcl M 50mers B fma-k-a-v.

A TORNEY Dec. 26, 1939. R. M. SOMERS PHONOGRAPH RECORD SHAVING MACHINE Filed June 25, 1938 3 Sheets-Sheet 3 mvENToR BY Richard M.5'omers m fimkm...

RNEY

removal of Patented Dec. 26, 1939 UNITED STATES 2,184,365 PHONOGRAPH miooao SHAVING MACHINE Richard M. Somers, West Orange, N. 1., assignor to Thomas A. Edison, Incorporated, West Orange, N. J., a corporation of New Jersey Application June 25, 1938, Serial No. 215,948

29 Claims. (CI. 8.2-1.1)

- This invention relates to machines for shaving or resurfacing phonograph records principally of the type intended for use with dictating machines. This invention is particularly concerned with improvements in such machines which are adapted to improve the operation of the machine and to prevent the operator from inadvertently performing operations in the use of the machine which may result in damage to the machine or to the records to be resurfaced.

The operation of shaving a record involves the mounting of a record on themachine, the conditioning and operating of the machine so as to effect the resurfacing of the record, and the he record from the machine. In order to effect such a shaving operation, a series or cycle of manipulations must be performed on the machine. These recurring manipulations, as in the performance of successive shaving operations, are desirably performed in a suitable selected sequence in order to insure the safe and proper operation of the machine. Moreover, in order to render the machine more conveniently operable, some manipulations may be automatically performed incidental to the performance of others. In this connection the machine may be also arranged so that the performance of the terminal manipulations of one cycle may automatically eiiect the operations normally performed by the initial manipulations of a subsequent cycle; as the operator completes the resurfacing of a record and removes the record from the machine, the machine will then be already partially conditioned for a resurfacing'operation on a subsequent record.

It is an object of my invention to provide, i phonograph record shaving machines, improvements adapted to facilitate the operation of the machine and to safeguard the machine against improper usage.

It is another object of my invention to provide means in record shaving machines for partially conditioning the machine for another resurfacing operation as an incident of completing a previous resurfacing operation.

t is another object of my invention to provide, in phonograph record shaving machines, means for preventing the removal of a record from the machine while the resurfacing tool is in set or operative position.

It is a further object ofmy invention to provide means for rendering the record ejecting means inoperative while the resurfacing tool is in record shaving machines, means for partially returning the carriage to its initial position as an incident or removing a record from the machine.

It is a further object to provide means for im- 5 parting return movement to the carriage as an incident of operatingthe record ejecting means.

It is another object of my invention to provide means, in record shaving machines, for preVent-' ing damage to thecarriage feeding means while '10 the carriage is returned to initial position.

It is a further object of my invention to pro- .vide auxiliary means, in record shaving machines, for preventing movement of the carriage towards its initial position except when the feednut is wholly disengaged, from the feed screw.

It is another object of myinvention to provide, in record shaving machines, an improved form of resurfacing tool setting mechanism which is adapted to enable the resurfacing tool tobe repeatedly set at substantially even depths of out.

Other objects and features of my invention will more fully appear from the following description and the appended claims.

In the-description of my invention reference is had to the accompanying drawings, of which:

Figure l is a top plan view of a phonograph record shaving machine showing my invention applied thereto;

Fig. 2 is a vertical cross sectional View taken along the line 2--2 of Fig. 1;

Fig. 3 is a vertical cross sectional View, take along the line 33 of Fig. 1, showing the means.

controlled by the resurfacing tool for locking the r 'theframe of the machine being shown in cross section; v

Fig. 7 is a side elevational view of a'portion of the'machine, partly in cross section, showing, in particular, details of the setting mechanism for the resurfacing tool, and means controlled in accordance with the setting of the resurfacing tool for locking the end gate in its supporting position; N

Fig. 8 is a fragmentary front elevational View h r c rd ej ct n mea and a f n elevtae tional view of the means connected with the record ejecting means for partially returning the carriage, and showing the means for restricting the further return movement of the carriage;

Fig. 9 is an enlarged cross sectional view taken along the line 99 of Fig. 7; and

Fig. 10 is an enlarged fragmentary View, partly in elevation and partly in cross section, showing details of the means for supporting and clamping the knife bar of the resurfacing tool.

Reference being had to Fig. 1 there will be seen a form of phonograph record shaving machine in which my invention is preferably employed. This machine comprises a base plate I having a left-hand standard 2, right-hand standards 3 and 4 and an intermediate standard 5. The standard 2 supports a conically pointed stud '6 which engages a recess in the left end of a shaft 1 to provide a thrust bearing for the shaft. The shaft 1 passes through an oversized hole 8 in the standard 5 and carries a mandrel 9 for holding a cylindrical record I!) to be resurfaced. The right end of the shaft 1 is supported by another thrust bearing comprising a conically pointed stud ll which engages a recess in the right end of the shaft. The stud II is carried by an end gate l2, and is adjustable relative thereto by an adjusting screw l3 well known in the art.

The end gate 52 is pivoted to a boss 14 (see '7) so that it may be opened or swung outwardly from its supporting position, shown in Fig. 1, to a non-supporting position wherein it is free of the right end of the mandrel 9, thereby permitting a record to be mounted on or to be removed from the mandrel. The end gate l2 may be closed or moved into its supporting position by imparting a clockwise movement thereto until its forward extremity impinges against the right end of a guide rail l5 which extends laterally along the forward part of the machine, the end ate being releasably held in its supporting position by a latch It. When the end gate I2 is open the shaft I is intermediately supported by the intermediate standard 5; in. this case the shaft will tend to move rightwardly free of the stud 6 at its left end, but such movement is restricted by the abutment of a collar H on the shaft with the left side of the standard 5.

When the end gate l 2 is in its supporting position the mandrel 9 is rotatably supported in an operative position in which it is in true parallel relation with respect to the guide rail I5. Supported by the left and right standards 2 and 3 is a longitudinal rod l8 which is also in true parallel relation to the guide rail l5 and on which there is slidably and tiltably mounted a carriage l9 having a sleeve bearing 2il embracing the rod I8. This carriage is also provided with an approximately semi-circular and forwardly extending arm portion 1 9' having a downwardly extending shoe portion 2| disposed directly above, and adapted to be slidably supported by, the guide rail l5. At the upper forward end of the carriage arm l9 there is provided a weight or handpiece integrally formed with the arm and disposed substantially above the guide rail l5.

On the right side of the carriage l9 there is a boss 22 which substantially overlies the longi tudinal rod iii. A resurfacing tool 23 is slidably mounted on the boss 22 for movement into and out of operative position with respect to the record 10. When the resurfacing tool is in an operative position it is adapted to cut away a surface layer of the record material as the record is rotated and the carriage I9 is steadily moved across the record, the base plate I being provided with an opening 24 through which the cut-away surface layer, or record shavings, may pass as into a suitable container not shown. In order that the carriage I9 may be moved across the record coincidentally with the rotation of the mandrel-9, there is secured on the sleeve bearing 20 a collar 25 carrying a rearwardly extending and resilient arm 26 bearing a feed nut 21 at its rearward end. When the carriage arm I9 is in itsnormal lowered or operative position, the shoe 2! being supported by the guide rail IS, the feed nut 2'5 engages the underside of a feed screw 28 rotatably supported by the standards 2 and 4 and having a shaft 28' at its left end carrying a pulley 29. The pulley 29 may be coupled, as by a suitable belt, to a pulley 30 located on the shaft 1 alongside of the pulley 29. A rotation of the mandrel 9 will then provide rotational movement of the feed screw 23 to effect a longitudinal movement (in a left hand direction) of the carriage l9 with respect to the mandrel. It is thus apparent that with this arrangement an upward tilting movement of the carriage arm l9 will cause the resurfacing tool 23 to be moved away from the record if), and the feed nut 27 to be moved downwardly out of engagement with the feed screw 28, thereby permitting the carriage to be manually moved along the record I0. Such upward tilting movement of the carriage arm I5 is however limited by the abutment of a rearwardly and downwardly extending arm 3| provided on the carriage with a stop 32 suitably comprising a reenforcing rib extending along the rear edge of the opening 24.

For effecting rotational movement of the mandrel 9 there may be employed a suitable electrical motor lVl, shown diagrammatically in Fig. 2,

which may be aptly located on the underside of the base plate 5 and coupled, as by a belt, to a pulley 33 secured on the shaft 1, the base plate I being provided with an opening 33 through which the motor drive belt may pass. The motor M is serially connected with a single-pole one- 3 way toggle switch 14 in a power circuit '15 which is adapted to make connection with a suitable source of power as by way of a plug 16, the motor M being thus controlled by the switch M. This switch is adapted to be automatically operated to off and on positions by the respective forward and return movements of the carriage H). For this reason the switch 14 is preferably located on the top side of the base plate I in its left rearward portion as shown in Figs. 1 and 2. Extending forwardly of the switch 76 is an actuating arm Tl suitably biased so as to snap into its respective 01f and on positions, indicated by the respective left and right positions shown in Fig. 1, by reason of the toggle nature of the switch.

The switch M is preferably turned slightly in a counter-clockwise direction so that the actuating arm ll will project further forwardly when it is in its leftward or off position than it will when it is in its rightward or on position. On the carriage there are provided left and right brackets 78 and 19 which are arranged to contact the switch arm 71 for operating the switch" l by the movement of the carriage. The bracket l8, which is secured to the collar 25 of the carriage sleeve 26, is arranged to slightly clear the switch arm 71 when the arm is in its on position; however the bracket 79, which is secured to the carriage arm 3| by the screws 80, is U- shaped and suitably extended rearwardly to encounter the switch arm 11 when the arm is in its on position. By such encountering the switch arm H is moved leftwardly to off position as the carriage I9 is moved forwardly in a leftward direction into its terminal position. The

terminal movement of the carriage will thus stop the machine. As the carriage I9 is returned to initial position the bracket 18 will encounter the Switch arm Tl when the carriage reaches an in-' termediate position in itsreturn travel and thereby move the switch arm rightwardly from ofi position to on position so as to restart the machine.

The resurfacing tool 23 comprises a knife bar 35 carrying a knife blade 36 at its inner or lower end. The knife bar 35 is slidably mounted in an opening 35' provided in the boss 22 for movement towards and away from the record In so as to move the resurfacing tool, or the knife blade 36 which forms a part thereof, into and out of operative position with respect to the record. The upper end portion of the knife bar 35, which projects above the boss 22, is reduced in diameter and is extended loosely through the top wall of a hollow cap 3'! which fits slidably over the boss 22. On the upper extremity of the knife bar 35 there is provided a head 38 for limiting the upward movement of the cap 37 with respect to the knife bar. The cap 37 is normally urged against the head 38 by means of a resilient coupling between the knife bar 35 and the cap 3?, which coupling is adapted to yieldingly move the knife bar 35 downwardly so as to bring the knife blade 35 into proper engagement with the record I!) as the cap 3'! is moved downwardly. Such resilient coupling may comprise a suitable compression spring 39 (see Fig. 7) coiled about the reduced diameter portion of the knife bar 35 between the top of the cap 31 and an adjustable collar 40 provided on the knife bar.

Movement of the cap 31 is guided by means of a guide rod 4| secured to the cap 31 by a headed screw 42 and slidably mounted in an opening which extends through the boss 22 in parallel relation to the opening 35 through which passes. the knife bar 35. In order that the resurfacing tool 23 may be normally maintained in an upward or inoperative position, the cap 31 is biased upwardly by means of a compression spring 43 coiled about the guide rod 4| between the boss 22 and the top wall of the cap 37. Such upward or inoperative position of 'the resurfacing tool 23 is determined by the abutment of a collar 44, secured to the lower end portion of the knife bar 35 by a set screw 45, with the underside of the boss 22.

- For moving the resurfacing tool 23 into operative position, there is provided an actuating lever 46 which is pivotally' supported by a post 4'! secured by a press fit, as shown in Fig. 9, to the boss 22 and extended rightwardly thereof. A down ward movement of the lever 46 into a position such as is shown in Fig. 2, yieldingly moves the resurfacing tool 23 into operative engagement short arm 49 of the lever 46 by a pivot screw 55 and the upper end is provided with a longitudinal slot 5| through which passes a shoulder screw 5| threading into the right wall of the cap 31. The lower portion of the link member 48 is in the form of a gooseneck so that it will remain clear of the hub of the lever 46 as the lever is swung downwardly in the setting of the resurfacing tool; the gooseneck portion is adapted, however, to engagethe hub of the lever 46 to limit the downward movement of the lever to a position in which the axis of the pivot screw 50 is slightly past dead center with respect to the pivot axes of the lever-46 and of the shoulder screw 52. It will therefore be apparent that the lever is releasably locked whenever it is in its operative or downmost position by reason of the upward biasing force exerted on the cap 31 by the spring 43. It is further apparent that a slight upward or tripping movement imparted to the lever 46 to return the pivot screw across the dead center line aforementioned will effect the release of the resurfacing tool from set position.

With the above form of setting mechanism for the resurfacing tool there may be very desirably provided suitable clamping means, which are operated by the movement of the lever 46 through the end portion of its downward travel, for fixedly holding the resurfacing tool 23 in its operative position. These clamping means may comprise a pin 53 slidably'mounted in the boss 22 for transverse movement with respect to the movement of the knife bar 35. The inner end of the pin 53 abuts against the knife bar 35, whereas the outer end has a rounded portion projecting slightly beyond the side wall of the boss 22, as shown in Figs. 9 and 10. On the post 41 there is pivotally mounted a cam member 54 suitably comprising a sleeve 55 embracing the post 41 and an integral disc 55 having an' open sector of substantially 90, the disc being mounted adjacent to the side wall of the boss 22. The inner wall of the disc 55, along the lower radial line 51 shown in Fig. 7, is suitably beveled to form a cam face 58 which is adapted to slidably contact the outer end of the pin 53 to press the pin tightly against the knife bar 35. The actuating lever 45 is preferably pivotally mounted on the sleeve 55 of the cam member 54, the lever 46 and the cam member 54 being retained on the post 41 by a headed screw 59 threaded into the end of the'post. On the hubof the lever 46 there is a lateral pin 60, shown in Fig. 2, which extends within the open sector of the disc 56. The angular travel of the lever 45 is somewhat greater than the angle of the open sector of the disc 56 so. that, in setting the resurfacing tool into operative position, the

' pin 58 will first traverse the open sector of the disc 56 and then encounter the upper wall of the open sector to turn the cam member 54 through a small angular displacement in a counterclockwise direction. Such movement of the cam member 54 will cause the pin 53 to be pressed, as by the cam face 58, against the knife bar 35 so as to clamp the bar in its set position. In the release of the resurfacing tool 23 from set position, the pin 50 will first traverse the open sector of the disc 55 and then the pin 60 will encounter the lower wall of the open sector of the disc 55, as along the radialline 51, and turn the cam member sufficiently in a clockwise direction to free the cam face 58 from the pin 53, thereby unclamping the knife bar 35.

The mandrel 9 is slightly tapered so that a record may closely fit'the mandrel and be yieldably held thereon by the friction between the record and the mandrel. Usually considerableforce is required to remove a record from the mandrel after it has been suitably mounted thereon. For

monly provideda record ejecting means which facilitating the removal of a record there is'com- III may comprise a record ejecting member 6! having a hub 82 (see Figs. 1 and 6) pivotally mounted on a short rod 62' supported at one end by theguide rail i and at the other by the intermediate standard 5. Pivotally connected to the upper right end portion of the member 6! is a suitable record engaging shoe 63 (see Fig. 5) which is positioned slightly to the left of the adjacent end of the record I!) mounted on the mandrel 9. Along the left side of the member 6! there is secured a suitable handpiece 64, as by the screws 65, for facilitating the manual operation of the record ejecting means. The member 6! is also provided with a downwardly extending arm 66 which passes through an opening 6'! in the base plate and normally abuts against the rightward side of the opening, as by the weight of the member 6! and handpiece 64, to define the unoperated position of the record ejecting means. In operating the record ejector the handpieoe 64 is swung upwardly about the rod 62' so as to bring the record engaging shoe 63 into engagement with the record to push the record off the mandrel, the operate-d position of the record ejector being defined by the impingement of a short V-shaped arm 68 on the member 6! with the upper surface of the base plate I.

In phonograph record shaving machines there is also commonly provided a mandrel brake which is operated as an incident of operating the record ejecting means. The mandrel brake may comprise a vertically disposed arm 69 pivotally mounted on the rearward end portion of the rod 62' and carrying at its upper end a shoe 1B, commonly made of felt, which is adapted to engage the adjacent end of the mandrel 9 for retarding, by friction, the rotation of the mandrel. The brake arm 69 is provided with a forwardly extending pin H which is resiliently connected to a rearwardly extending pin 12 provided on the record ejecting member 6! and extending along the right side of the pin l, as shown in Figs. 1 and 6, the resilient connection being effected by a torsional spring 13 which is coiled about the hub 62 of the member f5! and hooked at its ends aboutthe respective pins l! and 12. By these means the brake arm Ed is adapted to be yieldingly moved in a clockwise direction, so as to urge the brake shoe 18 against the left end of the mandrel, as the record ejecting means are operated to remove a record from the machine.

The above described structure and mechanism are common to record shaving machines heretofore manufactured and used, and form a part of the present invention only in so far as they are related. to or combined with other mechanism hereinafter described.

In my invention I provide means for improving, facilitating and safeguarding the operation of the machine. These means comprise interlocking means which prevent the operator from removing a record from the machine while the resurfacing tool is in an operative position. When it is desired to remove a record from the machine, as for example at the end of a resurfacing operation,

the operator will first release the resurfacing tool. Such release permits the end gate to be opened and renders the record ejecting means operable. In order to render the resetting of the resurfacing tool more convenient, the operation of the record ejecting means is arranged to automatically return the carriage to a position wherein the resurfacing tool will overlie a properly. mounted record. The resurfacing tool may then be immediately set into operative position after a subsequent record is mounted on the machine. In order to render this setting of the resurfacing tool more accurate, I provide improvements in the setting mechanism for the resurfacing tool which are unusually well adapted to enable the resurfacing tool to be consistently set at substantially even depths of out. After the resurfacing tool is properly set, the next operation in the resurfacing of a record is to return the carriage to its initial position. Before a return movement can be imparted to the carriage, the carriage arm must be lifted upwardly to disengage the feed nut from the feed screw. It is therefore possible for the operator to inadvertently scrape the feed nut along the feed screw during such return of the carriage; in order that this may not occur, however, I provide means adapted to prevent any possible damage to the feed nut and the feed screw, as by a scraping of one or the other, during such return of the carriage. These means comprising my invention will now be described in detail.

It is important that the resurfacing tool be released from operative position before a record can be removed from the machine; otherwise the removal of a record while the carriage is in a position wherein the resurfacing tool overlies the record may cause the record surface to be marred and the blade of the resurfacing tool to be broken. The means for preventing the removal of a record from the machine while the resurfacing tool is in operative position may comprise a locking member 8!, disposed along the right side of the base plate l as shown in Figs. 1 and 7, for releasably locking the end gate I2 in its closed or supporting position. Reference being had particularly to Fig. '7, there will be seen a downwardly extending arm 82 on the front portion of the end gate !2 which, in the opening movement of the end gate is adapted to encounter a turned up lug 83 at the forward end of the locking member 8!. The member 8! is provided with the front and back longitudinal slots 84 and 85 (shown in Fig. 1) through which pass the respective shoulder screws 86 and 8!, each threading into the base plate I. The locking member8! is thus slidably mounted for rearward movement so that the lug 83 may be moved out of the path of the arm 82 on the end gate, and thereby render the end gate free for opening movement. The member 8! is urged forwardly into its locking position by a tension spring 88 connected between the rearward end portion of the member 8! and a pin 89 on the base plate rearward movement of the member 8! is effected by the release of the resurfacing tool from operative position as is now described.

The rearward end portion of the member 8! is bent leftwardly and then turned up to form an ear 9% having an open slot 9! through which slidably passes a lateral pin 92 carried by a cross bar 93 located slightly above the base plate and extending throughout the length of travel of the carriage it, as shown in Figs. 1 and '7. The bar 93 has left and right turned over end portions which extend upwardly to form its respective left and right supporting arms 94 and 95. The lower end of the rightward arm 95 carries the lateral pin. 92; Whereas the upper end of this arm is pivotally connected by a shoulder screw95 to a rearwardly extending arm 9'! secured to the standard 3 by the screws 58. Theleftward arm fi l of the bar 93 is pivotally supported, at its upper end, by a bracket 99 which is secured to the base plate I by the screws lllil.

Thus the bar 93 is mounted for swinging movement, and is adapted, as it is swung rearwardly, to cause the locking member 8| to be moved out of locking position by the coaction between the pin 92 and slot 9I.

In order'that the bar 93 may be moved rear wardly by the release of the resurfacing to0l'23 from operative position there is pivotally mounted on the right side of the carriage a U-shaped member IIII having its left and right legs respectively pivoted on the inner and outer ends of a long shoulder screw I92 threaded into the boss 22 as shown in Figs. 1 and 7. The left leg of the member IIII is provided with an arm I93 which extends downwardly in front of the cross bar 93; whereas the right leg of the member IIII is provided with a forwardly extending arm I94 which is turned slightly upwardly so as to contact a cam I95 on the hub of the lever 46 when the lever 46 is in its rearward or inoperative position. As the arm I04 is brought into contact with the cam I05 the member IIII is turned in a Even though the end gate I2 is locked in its' supporting position, the operator may still partially remove a record from the mandrel, as by the record ejecting means. If this were done while the resurfacing tool is in operative position, the record and resurfacing tool may be subjected to possible damage. Since a record can be properly and conveniently removed from the machine only by the use of the record ejector, I preferably constrain the operator to release the resurfacing tool from operative position before removing a record from the machine, by the provision of means for rendering the record ejector inoperative while the resurfacing tool is set in operative position. These means comprise a rod I96 which is supported by a bar I01 secured to the top of the base plate I by the screws I08. The bar IEi'I is provided with front and back turned-up ears I89 and III] with suitable aper-:

its unoperated position. The rod III6 is normally 'urged forwardly into its locking position by means of a compression spring II2 coiled about the rod between a collar H3 provided thereon and the back turned-up ear I III. Forward movement of the rod I99 is, however, limited by the abutment of a headed screw II I, threaded into the rearward end of the rod, against the ear III).

In order that the rod IIIB may be moved rearwardly out of its locking position by the release of the resurfacing tool 23 from operative position, there is provided a right angle link mem ber IE5 for coupling the cross bar 93 with the rod I92. The rearward end of the link H5 is pivotally connected to the lower end of the lef ward arm of the cross bar 93 by a pivot screw H6. At the other end of the link member H5 there is a provided a suitable aperture through which the rod I96 passes, this end'of the link the spring I I2. Rearward movement of the cross bar 93, which is incidental to the movement of the resurfacing tool 23 into inoperative position, will therefore move the rod I96 rearwardly out of the aperture III so as to, render the record ejector operative. In order that-the rod I06 cannot, in any possible way, be moved to lock the record ejecting means in a partially or fully op-- erated position, there is provided the aforementioned arm I55 which acts to prevent the rod I06 from being moved into a position to obstruct the operation of the record ejector while thereoord ejector is out of its unoperated position;

In the normal operation of the -machine the end gate I2 will be opened before an attempt is made to operate the record ejector. In order that the operator may conveniently release the resurfacing tool from operative position, to thereby unlock the end gate I2 and record ejector simultaneously with the movement of the end gate latch I6 from its latching position, there is provided a push button III in the region of the latch III which is suitably coupled with the resurfacing tool for manually releasing it from its operative position.

Reference being had to Figs. 1 and 4, there will be seen an aperture H8 in the base plate -I in the region of the latch I6 through which passes the push button'II'I provided with a head at its lower end normally urged against the lower side of the base plate I. The head of the push button I II contacts at its underside, a forwardly extend ing bail member I I9 which is pivotally connected by a long shoulder screw I29 to a double armed bracket "I2I secured to the underside of the base plate I by the screws I22. The bail member H9 is provided with a downwardly extending arm I26 is pivotally connected 'to a bar I3II by'the' pivotscrew I3I. The bar I30 is disposed in parallel relation to the longitudinal rod I8 slightly below and along the rear edge of the opening '24 in the base plate I. The bar I39 is supported at its left end by a link I3I pivoted to the base plate I by the pivot screw I32 and to the bar I39 by the pivot screw I33, the arm I29 and the link I3I I being adapted to form a pair of supports for the bar I30 so that the bar may move forwardly and rearwardly in parallel movement. is urged rearwardly against astop I34, comprising a turned-over lug on the arm I29, by means the resurfacing tool from operative position by means of amember I3! pivotally connected on the shoulder screw IIJ2 and straddled by the aforementioned U-shaped member IIII as shown in'Fig. 2. The member I31 may suitably be of a form having a substantially vertically extending lower portion I38 arranged to slidably contact the front edge of the bar I39, a central substantially semi-circular portion I39 bent at right angles to the portion I38 and pivotedat itsupper end on The bar I30 the screw I52, a bail portion I45 straddled by the member Illl, and'a forwardly extending arm I bent at right angles to the bail portion and pivoted on the outer end of the shoulder screw I02. The arm II contacts the underside of the short arm 49 of the lever 55 when the lever is in its downmost or operated position. A clockwise movement of the member :31, such as may be imparted thereto by pushing the button II'I downwardly to effect a forward movement of the bar I38 will thus cause a clockwise or upward tripping movement of the lever 46 to effect the release of the resurfacing tool 23 from operative position. r

The means for partially returning the carriage I9 to its initial position as an incident of operating the record ejecting means are shown in Figs. 1, 5 and 8. These means comprise a bar I62 pivotally supported at its rightward end by a shoulder screw I43 threading into a boss I4 5 on the inner side of the guide rail I5, and extending leftwardly therefrom along the inner wall of the guide rail. When the bar M2 is in its unoperated position, as shown in Figs. 5 and 8, the upper edge of its left end portion extends along, at a distance slightly below, the upper edge of the guide rail I5, whereas the upper edge of the remaining portion of the bar M2 is suitably considerably below the guide rail. The left end portion of the bar I42 is adapted to be swung upwardly so as to raise the carriage arm IS and to disengage the feed nut 2'! from the feed screw 23. For this reason the left end portion of the bar I42 is supported by a lever I45 having its leftward end pivotally connected to a boss I 55 on the inner leftward end of the guide rail, as by a shoulder screw I51, the lever extending rightwardly therefrom through substantially half the length of the guide rail. The right end of the lever I45 is coupled to the bar I42 and for this purpose it is provided with a longitudinal slot I48 through which slidably passes a lateral pin I49 carried by the bar I42 at a position substantially midway of the length thereof. The lever I45 is supported intermediately thereof by the engagement of its lower edge with the hub 52 of the record ejecting member til, the hub 52 having a cut-away segment I55 through which the lower portion of the lever M5 passes. As the record ejecting member BI is turned in a clockwise direction to eject a record, the right end of the lever I45 is tilted upwardly about the shoulder screw IA'I by the coaction between the hub 62 and the lever I45. The left end of the bar M2 is thereby tilted upwardly about the shoulder screw M3 into a position substantially indicated by the dash-dot lines l5I shown in Fig. 8. 4

When the carriage I9 is in the end portion of its forward travel (its terminal position being indicated in dash dot lines in Fig. 5) the upward tilting movement of the bar M12, as caused by the movement of the record ejecting member SI through the initial portion of its travel, will cause the carriage arm ii! to be raised, and will thereby cause the feed nut to be disengaged from the feed screw. As the member Si is moved further in the e ection of a record from the machine, the carriage i9 is adapted to be slidably moved rightwardly through a portion of its return travel by the impingement of an upwardly extending arm I5I provided on the member 5| with the left side of the shoe El on the carriage, the arm I5I being offset forwardly as shown in Fig. 2 in order that it may suitably contactv the shoe 2I. Such return movement of the carriage is insufficient, however,

to causethe switch '14 to be operated to on position, so that the machine will not be thereby restarted. When the record ejecting member BI is returned to unoperated position, the bar I52 will be lowered so that the carriage shoe 2| will again rest on the guide rail I5, the feed nut 21 then again being engaged with the feed screw 28. Since the resurfacing tool 23 had to be released from operative position before the record ejector could be operated, and since the carriage I9 is partially returned to move the resurfacing tool to a position overlying the record as an incident of operating the record ejector, the machine will be in condition so that the resurfacing tool may be immediately reset into operative'position after a subsequent record is mounted on the machine.

In order that the resurfacing tool 23 may be consistently set at a substantially even depth of cut, it is important that the knife bar 35 be freely slidably movable within the opening 35 through which the knife bar passes, particularly since the knife bar is spring-pressed into engagement with the record. It has therefore been important to have the bar 35 fit somewhat loosely in the opening 35'. and to provide a suitable lubricating oil to facilitate such free sliding movement. However the pressing of the knife bar 35 against one ide of the opening, as in the clamping of the bar for fixedly holding the resurfacing tool in operative position, has tended to squeeze out the lubricating oil and to cause considerable transverse movement of the knife bar. As a result of the extraneous movement of the bar and of the tendency for considerable friction to develop by reason of such squeezing out of the lubricating oil, which friction restricts the free movement of the bar, the blade 36 may tend not to be consistently pressed into the record surface at the same depth for repeated settings of the knife.

In my invention I provide means for avoiding the above difiiculties, which means comprise two flat faces I52 respectively milled along a portion of the knife bar on opposite sides thereof. Within the lower and upper portions of the boss 22 there are provided the respective hardened rollers I53 and I54 which may be mounted therein by way of suitable openings provided in the underside of the boss 22, and which may be suitably held therein by screw plugs. such as the plug I55 for the roller I54 shown in Fig. 9. The rollers I53 and I54 are mounted transversely of the knife bar 35 and are extended longitudinally thereof slightly within the opening 35 so as to slidably contact one of the flat faces I52 of the knife bar. The other of the flat faces I52 slidably contacts the inner end of the clamping pin 53 and also the lower and upper pins I55 and I5! which are disposed in suitable openings inthe right side of the boss 22. These pins are biased against the knife bar 35 by the compression springs I58 and I59, which are disposed between the respective pins and the respective screw plugs I58 and I55. By these means the knife bar 35 is urged against the rollers I53 and I54by the force of the compression springs I58 and I59, this force, however, being insufiicient to retard the free sliding movement of the bar. When the bar 35 is clamped, as by the clamping pin 53, it is urged against the roller I53 and I54 in the same direction as it is urged by the biasing springs I58 and I59. clamped, substantially no transverse movement thereof takes place, with the result that the lubricating oil is not squeezed out between the knife bar 35 and the opening 35. Consequently the Therefore, as the knife bar 35 is knife bar remains freely slidable within the opening 35' so that the resurfacing tool may be consistently set at a substantially even depth of out.

In operating the machine, as after the setting of the resurfacing tool 23 into operative position.

with respect to a newly mounted record, the carriage 59 will he returned to initial position, such further return of the carriage being adapted to operate the switch it into on positionso as to restart the machine. In the manual return of the carriage l9 itis important that the operator maintain the carriage arm H3 in such upward tilted position as will avoid a scraping of the feed nut 27 on the feed screw 28. In my invention I provide means for preventing such possible scrap ing by maintaining the carriage wholly released from the carriagefeeding means as the carriage is manually returned to initial position. These means may suitably comprise a parallel bar ifiil mounted on the inner side of the guide rail l by means of the left and right parallel motion supporting links l5! and 552 pivotally connected to the respective ears it! and !62 of the bar NHL-the links it! and H52 being also pivotally connected to the respective inwardly extending bosses 563 and 555 on the guide rail l5 by means of the respective shoulder screws M3 and M4. The bar I853 is urged rightwardly against a pin 165 on the guide rail 85 by m ans of a tension spring Hi5 connectedbetween an ear iii? on the link NH and a pin I68 secured on the base plate i. In such rightward position of the bar Hill the links 56! and IE2 are slightly inclined to the right and the bar 69 is caused to project above and parallel to the guide rail IS.

The left end of the bar preferably projects a small distance above the left end portion of the bar I42 when the bar I 4 2 is in its most upward or operated position. In the partial return of the carriage, as by theoperation of the record eject ing means, the left end of the bar liiil will then act as a suitable stop for limiting the return movement of the carriage. When the carriage arm i9 is raised above the bar Hit the carriage may be returned to its initial position. After the carriage arm J9 is'moved to a position overlying the bar Hi8, the bar will suitably maintain the carriage arm H3 in its upward tilted position .throughout the return movementoi the carriage, thereby maintaining th feed nut free of the feed screw. The length of the bar I68 is however limited to permit the carriage to move into a normal operating position, wherein the carriage arm i9 is supported by the guide rail I5, when the carriage reaches its initial position.

As the carriage is then fed forwardly the left end of the shoe 2i will encounter the right end of the bar 160 and move the bar leftwardly and downwardly to a position wherein the upper edge I of the bar 460 will be level with the upper edge of the guide rail iii. the upper corner of the right end of the bar l ifi' being suitably rounded to permit the shoe ii to slide above the bar and the weight of the carriage arm 59 being suificient to maintain the bar Hit in its downward position against the force of the spring 566. As the carriage shoe 2i rides off of the bar lfii], the bar will spring upwardly to its normal position shown in Fig. 8. In this position the bar will be again effective for limiting the partial return of the carriage as the carriage is moved by the record ejecting means and for preventing possible scraping of the feed nut against the feed screw as the carriage is manually returned to initial position.

I have herein shownautomatic means for partially returning the carriage to initial position,

and means for maintaining the carriage released from the carriage feeding means as the carriage is then manually returned through the remaining portion of its travel; it will be understood, however, that although I secure special advantages, mentioned hereinbefore by employing both these means together, I may employ either one of these means without the other. It wi l be further understood that I intend no limitation as to the length of the bar N30; for example. if the automatic carriage returning means be omitted, I may extend the bar I60 through the terminal position of the carriage. It will be seen, as for example by reference to Fig. 5. that if the carriage is advanced or fed through a portion of its travel to an intermediate position overlying the bar 16!! and then stop ed and returned to initial position. the upward tilting of the carriage. to release the carriage from the carriage feeding means, will permit the bar Mil to move upwardly into operative position, as by reason of the spring I60, to maintain the carriage released from the carriage feeding means. This same action would of course occur as the carriage is returned from its terminal position, if the bar Hill were extended through the terminal position of the carriage.

Although I have-described a preferred embodiment of my invention. it is to be understood that the same is subject to many changes and modifications without departure from the scope thereof, which I now undertake to express according to the following claims.

I claim:

1. In a phonograph record shaving machine having a support on and from which a record is mounted and removed: the combination of a tool-carriage capable of forward and return movements across said support; a member moved incidental to the removal of a record from the machine; and means operatively connected with said member for causing a partial return of said tool-carriage as an incident to a record removal.

2. In a phonograph record shavingmachine having means for supporting a record: in combination, a carriage movable across the record; means for ejecting a record fromsaid supporting means; and means, operatively connecting said record ejecting means with said carriage, for moving said carriage as an incident of operating said record ejecting means.

3. In a phonograph record shaving machine having means for supporting a record: in combination, a carriage capable of forward and return movements. across the record; a record ejecting means; and means, operated by said record ejecting means, for imparting return movement to saidcarriage.

4. In a phonograph record shaving machine having means for supporting a record: in combination, a carriage capable of being advanced and returned across the record, movable means for ejecting a record from said supporting means, means operated incidental to the movement of said record ejecting means for imparting return movement to said carriage, and a stop for restricting said return movement of said carriage.

5. In a phonograph record shaving machine having means for supporting a record: in combination, a carriage movable across the record; carriage advancing means releasably connected with said carriage; movable means for ejecting a record from said supporting means; and means, operated incidental to the movement of said recordejecting means, for releasing said carriage from said carriage advancing means and imparting return movement to said carriage.

6. In a phonograph record shaving machine having means for supporting a record: in combination, a carriage movable across the record;

carriage advancing means releasably connected with said carriage; record ejecting means movable between unoperated and operated positions; and means, operated incidental to the act of moving said record ejecting means from unoperated to operated positions, for releasing said carriage from said carriage: advancing means and imparting return movement to said carriage, said last named means being arranged to reconnect said cariage with said carriage advancing means as said record ejecting means is moved from operated to unoperated positions.

7. In a phonograph record shaving machine having a mandrel for supporting a record to be resurfaced: the combination of a record ejector; a tool-carriage; driving means; means for coupling said tool-carriage with said driving means;

and means, operatively connecting said coupling means with said ejector, for rendering said coupling means inoperative as an incident of operating said ejector.

8. In a phonograph record shaving machine having a support for a record to be resurfaced: the combination of a record ejector; a tool-carriage movable relative to said support; means for moving said tool-carriage comprising a rotatable feed screw and a feed nut mounted on said tool-carriage and normally engaging said feed screw; and means, controlled by said record ejector, for moving said feed nut out of engagement with said feed screw when said ejector is operated.

9. In a phonograph record shaving machine having a mandrel for supporting a record to be resurfaced: the combination of a record ejector;

a tool-carriage capable of forward and return movements across a supported record, and tiltable away therefrom; and means, operated by said ejector, for first tilting said tool-carriage and then imparting a return movement to the same.

10. In a phonograph record shaving machine having a mandrel for supporting a record to be resurfaced; the combination of a record ejector; a tool-carriage movable across a supported record and tiltable away therefrom; and means, operatively connecting said record ejector with the carriage, for tilting the latter as an incident of removing a record from the machine.

11. In a phonograph record shaving machine having means for supporting a record: in combination, a carriage; a resurfacing tool on said carriage movable into operative position relative to the record; and means, controlled by said resurfacing tool, for preventing the removal of a record from the machine.

12. In a phonograph record shaving machine having means for supporting a record; in combination, a carriage movable across the record; a resurfacing tool on said carriage movable into an operative position relative to the record; record ejecting means; and means, operatively connecting said resurfacing tool with said record ejecting means, for obstructing the operation of said record ejecting means While said resurfacing tool is in operative position.

13. In a phonograph record shaving machine having means for supporting a record: in combination, a carriage movable across the record; a resurfacing tool on said carriage movable into an operative position relative to the record; record ejecting means; means for locking said record ejecting means against operation; and means, operated by said resurfacing tool as an incident to the movement of the tool from operative position, for rendering said locking means inoperative.

, 14. In a phonograph record shaving machine having a mandrel for supporting a record: the combination of an end-gate for said mandrel having a latched position; a carriage; a resurfacing tool on said carriage; means for setting said tool into operative position relative to the record; and means, controlled by said tool-setting means, for locking said end-gate in said latched position.

15. In a phonograph record shaving machine having a mandrel for supporting a record: in combination, an end gate for said mandrel movable into supporting and non-supporting position, a carriage, a resurfacing tool and said carriage movable into operative position relative to the record, means for locking said end gate in supporting position, and means operated incidental to the movement of said resurfacing tool out of operative position for rendering said looking means inoperative.

16. In a phonograph record shaving machine having means for supporting a record: in combination, a carriage capable of being advanced and returned across the record; a resurfacing tool on said carriage movable into operative position relative to the record; means for imparting return movement to said carriage; and means, operatively connecting said resurfacing tool with said carriage returning means, for rendering said returning means inoperative while said resurfacing tool is in operative position.

1'7. In a phonograph record shaving machine having means for supporting a record: in combination, a carriage capable of being advanced and returned across the record; a resurfacing tool on said carriage movable into operative po-. sition relative to the record; record ejecting means; means for imparting return movement to said carriage as said record ejecting means is operated; and means, operatively connecting said resurfacing tool with said record ejecting means and carriage returning means, for rendering said record ejecting means and carriage returning means inoperative while said resurfacing tool is in operative position.

18. In a phonograph record shaving machine having means for supporting a record: in combination, a carriage capable of being advanced and returned across the record; a resurfacing tool on'said carriage movable into operative position relative to the record; record ejecting means; means for imparting return movement to said carriage as said record ejecting means is operated; and means, connecting said resurfacing tool with said carriage returning means, for locking said carriage returning means against operation while said resurfacing tool is in operative position.

19. In a phonograph record shaving machine having means for supporting a record: in combination, a carriage capable of being advanced and returned across the record; a resurfacing tool on said carriage movable into operative position relative to the record; record ejecting means; means for effecting return movement of said carriage as an incident of operating said record ejecting means; and means, connecting said resurfacing tool with said record ejecting means, for rendering said ejecting means inoperative while said resurfacing tool is in operative position.

20. In a phonograph record shaving machine having a mandrel for supporting a-record to be resurfaced: the combination of a tool-carriage movable across a supported record and tiltable upwardly therefrom; and means operated as an incident of tilting said tool-carriage for maintaining the same in a tilted position.

21. In a phonograph record shaving machine having means for supporting a record: in combination, a carriage capable of being advanced and returned across the record; carriage advancing means;-coupling means biased to normally connect said carriage with said carriageadvancing means and releasable to disconnect the same; and means, rendered operative incidental to the release of said coupling means, for maintaining said carriage disconnected from said advancing means.

22. In a phonograph record shaving machine having means for supporting a record: in combination, a carriage capable of being advanced and returned across the record; carriage advancing means; coupling means normally connecting said carriage with said carriage-advancing means and releasable to disconnect the same; and means, operative throughout at least a substantial portion of the return movement of said carriage, for maintaining said coupling means released.

23. In a phonograph record shaving machine having means for supporting a record: in combination, a pivotally and slidably mounted carriage capable of being slidingly fed from an initial position to other positions along the record; carriage feeding means; means for coupling said carriage with said carriage feeding means, and means being rendered inoperative while said carriage is in a pivotally moved position; and means for maintaining said carriage in said-pivotally moved position as said carriage is returned to said initial position.

24. In a phonograph record shaving machine having means for supporting a record: in combination, a pivotally and slidably mounted carriage capable of being slidingly fed across the record; carriage feeding means rendered inoperative while the carriage is in a pivotally moved position; record ejecting means; means for partially returning said carriage as an incident of operating said record ejecting means; and means for slidably' supporting said carriage in said pivotally moved position to maintain said carriage feeding means inoperative throughout the further return of said carriage.

25. In a phonograph record shavingmachine having means for supporting a record: in combination, a pivotally and slidably mounted carriage capable of being slidingly fed across the record; carriage feeding means rendered inoperative while the carriage is in a pivotally moved position; means for slidably supporting said carriage in said pivotally moved position throughout a predetermined portion of the carriagetravel, said means being moved into an inoperable position as said carriage is fed through said predetermined portion; and means for moving said carriage supporting means into an operable position when saidcarriage is fed at least beyond said predetermined portion. 7

26. In a phonograph record shaving machine having a mandrel for supporting a record to be resurfaced: the combination of a frame; an end gate for said mandrel movable into supporting and non-supporting positions; means for locking said end gate in supporting position; a tool-carriage mounted on said frame and movable with relation to the mandrel; means on said carriage for moving the tool into record-engaging position; and means on said frame for moving said tool from record-engaging position and coordinately rendering said locking means inoperative. I

27. In a phonograph record shaving machine having a record supporting mandrel: the combination of an end-gate for said mandrel movable between supporting and non-supporting positions; a releasable latch for holding said endgate in supporting position; separately operable end-gate locking means; a carriage movable with relation to the mandrel; a resurfacing tool on said carriage; means on said'carriage for moving said tool into record-engaging position; and manipulative means, disposed in the vicinity of said latch so that it is adapted for operation concurrently with the release of the latter and by a single manipulation of the hand, for rendering said locking means inoperative and causing said tool to be moved out of record-engaging position. 28. In a phonograph record shaving machine having means for supporting a record: in combination, a carriage movable across the record, a resurfacing tool comprising a knife bar slidably mounted on said carriage, means for biasing said knife bar transversely of the direction of its sliding movement, and clamping means for said knife bar operable so as to force the bar in the same direction as said biasing means.

29. In a phonograph record shaving machine having means for supporting a record: in combination, a carriage movable across the record; a knife bar slidably mounted on said carriage, having two fiat surface portions disposed substantially directly opposite of each other partially along the length thereof; a plurality of roller members slidably contacting, one of said flat surface portions; means, contacting the other of said flat' surface portions, for biasingly maintaining said bar in slidable engagement with said roller members; and clamping means contacting said other fiat surface portion, operable to force said bar against said roller members for locking the bar against sliding movement.

I RICHARD M. SOMERS.

and second column, line 21, claim l5, for "and" read on; page 9,

CERTIFICATE OF C ORBEC'IION ratent No. 2,l8h,565. December 26, 1959.

RICHARD M. SONERS.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 8, first claim 6, for "cariage read carriage; line 65, claim 12, nand insert instead a colon;

first coland that the said Letters Patcolumn, line 15, after the word "record" strike out the semicolo tunn, line 59, claim 25, for "and" read said; ent shouldbe read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 12th day of March, A. D. l9L O.

Henry Van Arsdale (Seal) Acting Commissioner of Patents.

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