USRE16063E - Isssmk oe - Google Patents

Description

May 5j1925.

R 16,063 L. P. VALIQUET IOTOR DRIVE FOR TALKING MACHINES Original Filed Marc'h 3, 1921 3 Sheets-Sheet l I lllllmllllll j 7 INVENTOI? zaz/lglsglzfigue/i.

WITNESS Mays", 1925. Re. 16,063 L. P. VALIQUET I uo'ron muva FOR TALKING mourns Original Filed March 3. 1921 :s Sheets-Sheet z 45 529 51 il 0 I 1 A X 3"! If! WITNESS HTTOPNEYS- Ma 5,'1925. fi 16,063

L. P. VALlQUE-T MOTOR DRIVE FOR TALKING MACHINES Original Filed March 5. 1921 3 Sheets-Sheet 5 //VVENTOf? Lam/3F e1 Reissued May 5, 1925; i

e a a I a Re. 16,063; i I warren ST E- T "weren- TALKING MACHINE COMPAN new or New (funny.

or CAMDEN, NEW JERSEY, A common- Ivorian. Dru-v12: son TALKING ori inal No. .1,4ss;77 2, dated august 21, 1923'; Serial 'u j.44 a;eo4 j.fi1e'a naieh 3, 1921. Appl icatiqn for i a reissue filed .July 24,1924. Serial no. 728L043.

To all lwlbmn it may concern: e

Be it known that 1, Lotus P. VALIQUET, a citizen of .theUnited States, and a resident of Chicago, in the county of Cook and State of Illinois,- have invented certain new and useful Improvements in MotorfDtivs for Talking Machines, of Whichfthe followin is a specification. I I 1 y invention provides an improved motor-drive for talking machines and in some ofit s features, has particularly to do with constructions wherein an electric motor used as thes'ource of power. It is under"- s'tood that an electric motor maybe employed to drive the shaft for the turntable of areeord,or the table itself of a talking machine, that the table rotation must be speed-governed and that the operationof the machine must be readily'controllable to. start or stop it., Butin attempting any mere substitutionof asmall electric motor for the customary spring motorof a disc record talking machine, one encounters jmany 00- related difficulties and problems that have not heretofore been successfully solved.

The general object of my invention is to provide a commercially satisfactory, efficient,

durable and inexpensive construction utilizing an electric motor as a power source and coordinating and Improving the features of speed-governing and of starting and stopping control in such a manner as to insure fully satisfactory operation of the mechanism and its substantial foolproofness" or protection from damage by careless operatibnl a. y I

One of the objeetsof my invention is to provide a talking machine motor Wit-l1 a speed con-trolllng and regulat ng device which is very sensitive and quickly responsiveto slight changes in the speedfof the rotation of the motorand which operates to apply a braking or speed retarding friction simultaneously at two points in. the

moving parts of a talking'machine inotcr as, for example, on the governor disc, the position of Which'va ries longitudinally. of the governor shaft with variations in the speed of the motor and on a friction receivingor braking element or disc which is also drivenby the motor.

A further object of my invention is i to provide a brake pad or shoe which coopen With'la .Id-isc driven by the motor and to vary the frictiontherebetween simultane between the friction pad or element of the governing mechanism and the governor disc cooperating therewith, all for "the purpose i t further object -ofn' y' invention is to proylde the 'governormechamsm of a motor with a secohdfrietion'pad or friction applyingunem'benwhi'ch ma continually applya light speed-lre'tardin fiiction-to the talking machine motolg'ian to vary thefamount of said friction on said motor by and in accordance wit the pressure between the governor disc and the friet'ion applying member cooperating therewith.

In g0vern ors usually employed to control and maintain oonstantthe speed of talking machine'motors all of the Work of braking the motor to reducethe speed or to prevent anincreasein speed is imposed directly upon the governor disc. The fly-balls are usually mounted on flat springs one end of each x is i'igidl secured 'to'the governor spindle and the ot er end of ,each is secured to the governor disc. Thuslit'i's thatthejconnection between'the goyernor disc and the motor is yieldln non-rlgid connection. To apply all. hrakingpressure to this disc tends to of the strain the governor mechanism and particularly the springs thereof, and tends to dis-v turb the balance of thefly-balls, to loosen the spring faste'nings, to produce governor noises, and to make the speed-controllingactionthereofsluggish or slow.

A further object of my invention is to reduce the strain usually imposed upon the governor mechanism by transferring a sale-- stant al partof the work of braking the motor to some posltively driven moving part the talking machine ,moton'thus relieving the delicate part of the .gove rning'mechaousl'y with the variations in the pressure a nism of undue work and thereby making the v governor Very quiet, sensitive and speed responsive. I

Among themore detailed objects of my 1n- .vent'ion are to provide amounting and corelation of the motor, gearing elements,

regulating and governing parts, and turn table'which will heat, once functionally adequateand mechanically economical for qnan tity production; to provide highly efiicient governing means for close, delicate. and substantially instantaneous control of the turntable speed and its maintenance at the selected speed despite current fluctuations tending to affect it; to facilitate and maintain accurate factory adustment, or users readjustment, between the speed-governing handle and the mechanical-governor parts to insure performance accordant with the speed lndlcating scale, and to give the requ site. range of speed variation; to associate the motor starting switch and'turntable brakemechanisms for proper relative functioning and also to relate the table and gearing so that turntable brake failure may not en danger the gearing, and in other and further particulars to improve generally and in detail the associated mechanisms of the drive.

In the drawings forming a part of this specification and in which the same reference characters are used throughout the various views to designate the same parts,'I have illustrated a specific embodiment of my invention for the purpose of full disclosure and wherein Fig. 1 is a plan view of the drive equipment with the record table removed andwith the trip mechanism associated with the tone arm; Fig. 2 is an end elevation of the construction shown .in Fig. 1, with the record turntable in place; Fig. 3 is a front elevation with parts broken away; Fig. 4 is an inverted plan view; Fig. 5 is a section on the line 55 of Fig. 4; Fig. 6

is a detached detail of the governor appliances; Fig. 7 is a section on the line 77 of Fig. 6; Fig. 8 is a section on, the line 88 of Fig. 6; and Fig. 9 is a vertical sectional detail of the turntable mounting.

In general it will at once be apparent from the drawings that on the frame or bed plate 10 all of the mechanisms are mounted; that the suspended motor 11, through the horizontal shaft 12, worm-drives the vertical shaft 13 for the record turntable 14 above the plate 10; that this vertical turntable shaft, 13 worm-drives a horizontal governor shaft 15, the speed of which is controlled by setting the governor handle 16 above the plate 10 to different positions; that the braking or release of the turntablejis effected by the brake structure 17,.the release latch 18 of which is subject to semiautomatic control from the tone arm 19 through a trip mechanism 20; and that the starting or stopping of the electric motor 11 is controlled by a switch 21 below the plate 10. The motor 11, designed for instance for a normal speed of say 1080 R. P. M., is mounted directly onthe underside of the plate 10 and communicates'its power directly to the shaft 12 preferably through a somewhat flexible coupling 12 of known type, the power shaft 12 having a thrust bearing in the end lug 22 and a support in the bearing sleeves 23 than the motor-drivenshaft 12 which parallels it and therefore is preferably driven from 'a second worm-wheel 27 mounted above the first worm gear 26. This worm-Wheel 27 meshes with and drives the worm 28 cut in the governor shaft 15'which is mounted to rotate in suitable bearings in thelugs 29 and 29 respectively depending from the frame 10, and for the requiste sensitive of control, this latter worm 28 is of the undercut tooth variety. The shaft 15 carries the governor structure 30 of known type, which comprises a friction or brake receptive element or disc 31. slidable longitudinally of and on the governor shaft 15 to different'positions dependent upon the speed of the shaft, a collar '31 fined on the said shaft 15, and the usual ball-laden governor springs 33 connecting the collar 31 withthe hub of the disc 31. The speed controller operated by the governor handle 16 cooperates with the friction disc through the friction pad or friction applying member 3st but preferably thereis co-related with this pad 34 another pad 3 L to act upon the motor shaft 12. Thus, fixed to the motor shaft 12 is a friction or brake receptive element 32 preferably of a somewhat larger diameter than the governor disc 31 and preferably lying in the same or in a parallel plane. The two friction pads 34L and 34 cooperating with the margins of these discs 31 and 32 respectively are mounted onthe opposite ends of a rocker arm or lever 35 pivoted as at 35 to the governor brake lever 36 which in turn is pivoted at 37 to the plate 10 preferably near the vertical plane through the shaft 12. The lever 36 is normally retracted by a spring 38. Between the lever 36 and rocker arm 35 is a light spring 39 tending to hold the friction pad 34= on the adjacent end of the rocker arm 35 away fromthe governor disc 31 and to hold the pad 34: lightly against the motor shaft disc 32 even when the governor brake lever 36 is retracted.

Thus, it is insured that the governor disc 31 is left entirely free, when the machine is idle whatever may be the position of the governor-handle 16 and this insures the starting of the motor 11 with facility. It is to be understood that a light pressure on the pad 34; of the governor disc 31 tends detrimentally to prevent prompt starting or pick-up of the'motor because motion is table 14v fixed to the shaft 13, a heavy strain would be thrown upon the worm gearing 2526 were one to attempt to rotate the turntable after the motor stops. For this and other reasons the turntable let is rotatively loose on the shaft 13 and is merely frictionally carried in rotation therewith.

In the specific construction shown, the turntable shaft 13 has secured thereto near the upper end thereof a cupped carrier or support 53 on the annular horizontal rimof .which the turntable 14 normally bears, the extremity of the shaft 13 extending loosely into the downwardly projecting hub 14 of the turntable which is recessed from above as at 54 to receive the spring 55, which in turn is maintained in contact with the base of recess by a flange. at the bottom of the record receiving and centering pin 13? which may be fastened to the end of the, shaft 13 by screw threads. The spring 55 insures the maintenance of an adequate frictional connection for the normal rotation of the turntable synchronously with the turntable shaft. But if one oscillates the turntable by hand, tries to turn it backward or forward or'leaves it free from brake restraint While stopping the motor, no damaging strains are thrown upon the driving mechanism because of the frictional connection between the turntable and the turntable shaft.

It will be noted that not only is the construction above described advantageous in its correlation of functions to secure the best performance under the conditions imposed by an electric motor drive, but that in the mechanism structure, the mounting and the interconnection of the parts, advantageous simplicity, manufacturing economy, smallness of size and disposition of the arts for accessibility and lubrication are 0 distinct merit. y

' It is further to be noted that by the mechanism above described the workof braking the talking machine motor is distributed between the governor mechanism proper and the supplemental braking member. A part of this work of braking is transferred to. and performed by a positively driven part of the motor mechanism as distinguished from a non-positively driven part,

i such asthe governor disc driventhrough the springs connected to the governor spindle,

and this braking action is; varied directly by and in. accordance with the pressure with which the governor disc .bears against the governor pad. By thus relieving the governor disc of a substantial part of the work heretofore usually performed by it, the governor is rendered much more sensitive and more quickly responsive to slight variations in the speed of the motor.

Iclaim: i i 1. In a machine of the character described, the combination of a table shaft, a

drive shaft and a governor shaft, provision for worm-driving the table shaft from the driving shaft and. the governor'shaft from the table shaft, a governor on the governor shaft having a brake-receptive element, a

brake-receptive element on the drive shaft, and speed-governing-brake means coacting with both said brake-receptive elements.

5 2. Ina machine of the: character de' scribed, the combination ofja' table shaft, a drive shaft and a governor shaft, provision for worm-driving the table shaft from the driving shaftand'the governor shaft from the table shaft, a governor on the governor shaft having a brake-receptive element, a

brake-receptive element on the drive shaft,

and speed-governing-brakemeans coacting .brakereceptive disc, a governor shaft hav ing a governor thereon and a governor shiftable brake-disc, a table shaft and provision for Worm-driving said table shaft from the drive shaft and worm-driving the governor shaft from the table shaft, a pivoted main governor lever, a rocker lever pivoted on said mainlever and bearing on opposite arms brake pads for the two respec tive brake-discs, and yielding means normally tending to tilt said rocker lever away from the brake disc of the governor.

4. In a drive ofthe character described, the combination of an electric motor, a shaft directly driven thereby bearing a brakemember rotatable therewith, a table shaft. worm. gearing having machine threads between the drive shaft and the table shaft, a governor shaft. having an undercut worm, geared to the main shaft, said shaft carrying a governor having a movable brake-receptive surface, a rocker lever having pads for respective coaction with said two brake, surfaces of the governor and the drive shaft,

a main governor lever pivotally carrying said rocker lever, a spring interposed between said two levers tending torock said rocker lever to effect brake contact with the drive shaft brake surface and out of contact with the governor brake surface, and a handle for moving the main governor lever.

5. In a drive of the character described, the combinationof an electric motor, a shaft directly driven thereby bearing a brakemember rotatable therewith, a table shaft, worm gearing having machine threads betweenthe drive shaft and the table shaft, a governor'shaft having an undercut worm, geared to the main shaft, said shaft carryrapes transmitted to the governor shaft by a gearing which consists of a worm gear '(lIlV- ing a worm. A light contact of the pad 34" on the friction disc 32 of the motor shaft 12,

I tains full speed, the friction disc 31 engages,

moves longitudinally of the governor shaft 15 and finally touches or engages the friction pad34 and pressing against the pad 34 causes the pad 34' to be correspondingly pressed against the brake disc 32 through the arrangement of the rocker arm 35. This takes the strain off of the governor mechanism and applies a bral-zing' friction directly to the motor shaft giving such delicacy of control and such promptness of response to the movement of the handle 16 as to produce almost instantaneous response to any movement of the handle 16-to vary the speed of the motor and turntable. In practice, relatively small. adjustments of the handle 16 made While sound is being reproduced from a record are responded to so promptly that to the auditor there is little or none of the customary slur-ring between pitches of the music or voice that ordinarily attends speed adjustment while a talking machine is reproducing sound.

The governorhandle 16 has a crankcon nectionunder the plateliO with a governor lever 36 and the handle 16 preferably cooperates with a customary scale 40 which may be marked with speed-indicating graduation 40. It is important that the connection between the handle 16 and the govern'or mechanism be so shaped and so readily adjustable that the scale indicated tablespeed (particularly around the normal R. P. M. speed) and the actual performance of the turn-table shall tally. I prefer to gear the vertical shaft 13 to the motor shaft 12 so that at the normal speed of the ordinary shaft ('i. (2. 80 R. P. M.) the motor will be running at say 10 revolutions below its rated speed, giving a leeway to take care of voltage drop in the supply line and I prefer that under these conditions the gearing shall drive the governor shaft at about 1250 R. P. M. In setting or readjusting for these preferred conditions, the handle 16 is arbitrarily set at 80, the governor lever 36 is hand moved to establish the requisite turntable speed (by the use of the speed indicator temporarily applied thereto) and then an adjustable element of operative-connection between the two levers is fixed in its proper adjustment. For this connection an 'adjustable link 41 is employed, the same comprising two overlapping flat sections 41" and '41 one seamen 4E1 "bein divoted to a n l "thecrank 12 of the handle 16 and-the other section 4'1"" being pivoted to the end of the governor lever36, the two overlapping sections being adjustably connected together by a screw a3 passing through a washer 3 and" a slot 43 in the section 41 and the section 41 being preferably guided betweenparallel shoulders or ledges l -l struck up or otherwise formed on the sides of the link section 2411f.

The truntable H is preferably quite heavy for fly-wheel effect and the mounting therefor, the provision for braking it, and the corelation of the brake mechanism with the motor switch are preferably organized in manner that is of particular advantage when an electric motor is used as the prime mover or power element with the sensitive and adequate governing mechanism above described The turntable brake 17 above the plate 10 may be the usual bell crai'ik lever with a finger piece or handle 45mm a brake pad arm 46, the pad of which is adapted to be brought into and out of enga'gment with the turntable. The lever 17 is preferably p'ro' vi'ded with a shoulder 47 coacting with the latch member 18 under the tension of the spring -28 in known fashion. The latch member 18' is conveniently subject to semiautomatic control by the trip arm 20, the adjustable prong 49 if which coacts with the pin 50 projectingdownwardly new and rigid with the tone arm 19, also in known fashion. The shaft 51 which turns with the brake lever 17 carries, below the plate 10 the movable contact arm 21' of the motor switch 21 and is arranged to open the motor switch before the brake is applied and to release the turntable before the motor switch is closed. The advantage of this is that the motor may not receive current until the turntable is free to rotate nor while the brake is applied to the turntable, but it makes possible a careless manual operation of the brake lever 17 to leave the turntable free from the braking effect of the brake 17 while the switch lever 45 is in" an intermediate position (after freeing the turntable and beforeclosing the current through thes'witch 21) or when the current to the switch is'b roken by an outside or main controlling switch or when the plug towhich the wires from the switch are connected is, removed from the socket. Under such conditions with the motor 21 stopped one might try to rotate the turntable by hand. In this connection it will be understood that the machine-toothed worm and gear connection and drive '25 26 between the motor shaft 1 2a nd"theturntable shaft 13 while, effective to impart driving ower from the worm 25 to the wheel 26 is practicably incapable of transmitting motion from the wheel 26 to the worm 25' and therefore'were the turnbears against said means.

said rocker lever, a spring interposed be tween said two levers tending to rock, said rocker lever to effect brake "contact with the drive shaft brake surface and out of contact with the governor brake surface, and

means for inovingtl e main overnor lever, comprising a handle and quickradpistment link-connection between the handleand the main governorlever.

GLIn a drive of the character described, a

base, table shaft, means for driving the table shaft, a governor acting on the table shaft, governor lever, a hand-lever cooperating with a scale, and operative connections between said hand lever and governor lever comprising a two-part link'fand quick-adju stmeiit connection between the parts of said link. i v

7. In a motor mechanism, thecombination :of a -m otor, a brake receptive member rotated thereby, a governor shaft drivenby said motor, a governor disc carried by and rotating with said governor shaft and movable longitudinally thereon to different positions depending upon the speed of the ro tation of said governor shaft, and means cooperating with said governor disc and with said brake receptive member to apply a braking friction to said member and motor and to vary said friction and in accordance with the pressure between said governor disc and said means.

8. In a motor mechanism, the combination with a motor, of a governor driven by said motor and including a governor disc and a governor shaft upon which said disc is{ mounted, said disc tending to move to different positions longitudinally of said shaftby and in accordance with the speed of rotation of said shaft, a member also driven by said motor and providing a brake receptive surface, and friction applying means held pressed against said brake receptive surface by said governor disc when said motor is normally running and operative to vary the pressure between said means and said surface by and in accordance with the pressure with which said governor disc 9. In a motor mechanism the combination with a motor and a speed governor therefor, including a governor shaft driven by said motor and a disc longitudinally slidable on said shaft by and in accordance with the speed of said shaft, of a brakable member also driven by said motor, and means having one portion extending into the path of the longitudinal movement of said disc andhaving another portion bearing against said brakable member, whereby the pressure with which said means bears against said brak- Aable inember varies andfin accordance with as pressure with whiclrsaid disc bears against said means, whenf the motor is running at normal speeds;

Y 10. In a motor-fmechanism, the combinationfof a driving motor, a governor shaft driven by. said motor, a governor disc cariied by saidgovernor shaft and movable longitudinally thereon, to different positions depending upon the speed of rotation'of said shaft, of a 'brakable element positively driven by said motor, a lever pivotedbe tween the ends thereofand having its ends respectively adjacent said governor disc" and .said bralrable element, a friction pad on one ,end of sa d, lever to cooperate with said governor disc, and a friction pad on the other end of said lever arranged to apply friction to said element whereby variations in the pressure between said governor disc and the friction pad cooperating therewith correspondingly varies the pressure between said braking element and the frictio'npad cooperating therewith. M f i 11. In a motor mechanism, the combination with a motor, of a brake receptive member positively driven thereby and provided with abrakin'g surface, a governor shaft also positively driven by said'driving shaftand provided wars friction surface rotated by and longitudinally movable with respect to said governor, shaft, a lever piv-1 oted between the ends thereof and havingits ends respectively ad aQentsaid braking surface andsaid friction surface,a pair of friction members mounted respectively on the ends of said lever and engaging said friction surface and said braking surface respectively when said motor is revolving at normal speeds, whereby any variation in the pressure between said friction surface and the friction memberadjacent thereto produces a corresponding variation in the pressure between the other of said friction members and the braking surface cooperating therewith. y

12. In a motor mechanism, the combination with a motor of a brake disc positively driven by said motor, a governor shaft also driven by said motor, a governor disc mounted on and rotated with and longitudinally movable with respect to said governor shaft, a lever pivoted between the ends thereof and having its ends respectively adjacent said governor disc and said brake disc, 3. pair of friction members mounted respectively on the ends of said lever and engaging said disc respectively when said motor is revolving at normal speeds, whereby any variation in the pressure'between said governor disc and said friction member cooperating therewith prothe brake disc cooperatingtherewith.

13. In a "motor mechanism, the combinasaid lever and respectively engaging said discs when said motor is running at normal speeds, and means to bodily adjust the position of said pivoted lever with respect'to said discs to vary and adjust the speed of said motor.

14. In a talking machine motor including a speed responsive governor comprising a governor disc and a friction pad cooperating therewith, the combinationof a supplemental braking mechanism for the motor, the braking action of which is varied by and in accordance with the pressure with which said governor disc bears against said friction pad.

15. The combination with a motor, of a centrifugal governor driven by said motor and comprising a shaft and a friction member rotated by said shaft and movable lon itudinally thereof to different positions d pendent upon the speed of said shaft, a brake receptive member also positively driven by said motor and movable friction applying means engaging said brake receptive member and said friction member when said -motor is normally running, whereby the pressure-between said friction applying means and said brake receptive member is varied by and in accordance with the pressure with which said friction member of said governor presses against said friction applying means.

16. The combination with a motor, of a centrifugal governor driven by said motor and comprising a shaft and a friction member rotated by said shaft and movable vlongitudinally thereof to different positions dependent upon the speed of said shaft, a brake receptive member also positively driven by said motor, friction applying means engaging said brake receptive member and said friction member when said motor is normal- I 1y running, whereby the pressure between said friction applying means and said brake receptive member is varied by and in accordance with the pressure with which. said,

friction member of said governor presses against said friction applying means, and

means to bodily adjust the position of said movable friction applying means to adjust the speed of said motor.

In Witness whereof, I have hereunto set my hand this 18th day of July, 1924.

LoUIs P. VALIQUET

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