US2839305A - Selective record changer - Google Patents

Description

June 17, 1958 L. .J. ANDRES. 2,839,305

\ SELECTIVE RECORD CHANGER Filed May 31. 1951' 7 1Q Sheets-Sheet 1 a F/6./- I

I) H6 2 INVENTOR.

J1me 1, L. a. ANDRES 2,839,305

SELECTIVE RECORD CHANGER Filed May 317. 1951 f w 10 sheets sheet 2 .ss 74 I36 205 5a l W/ l0 0' ,.1

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I4 6 FIG. 4. v INVENTOB.

June 17, 1958 Filed my 31. 1951-- L. J. ANDRES SELECTIVE RECORD CHANGER 10 Sheets-Sheet 3 1N VEN TOR. v

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June 17, 1958 L; a. ANDRES SELECTIVE RECORD CHANGER Filed May 31 1951 10 Sheets-Sheet 6 IM EToE. E

June 17, 1958 J, nb zs 2,839,305

SELECTIVE RECORD CHANGER Filed my 31, 1951-" 1o Sheets-Sheet 7 INVENTOR.

' mea lay 31 1951 June 11, 1958 L. J ANDRES. 2339305- smzc'rrvmscoan CHANGER 1o Sheet s-Sheet s FIG. 27.

20s I I 2 v 20 INVENTOR.

June 17, 1958 L. J..ANDRE$ 2,

SELECTIVE RECORD CHANGER Filed may 31. 1951 v 4 1o Sheets-Sheet 9 FIG. 2/.

J n 17 1958 L. J. ANDRES 2,839,305

SELECTIVE RECORD CHANGER Filed May 31 1951 10 Sheets-Sheet 1O INVENTOR.

United assgses sELEcrrvn RECGRD cnareonn Application May 31, 1951, Serial No. 229,098

11 Claims. (Cl. 274-10) This invention relates in general to record changers for playing disc phonograph records and more particularly to a mechanism for automatically and selectively playing side of each of a plurality of records.

lrior to this invention, selective record players of this general type were complicated and expensive to manufactureand more specifically they required the use of multiple electric motor and control switches therefor or multiple clutches operated by complicated control mechanisms or both. These previous machines were therefore not generally used in domestic type phonographs. Thus these previous machines were confined principally to professional use under the supervision of skilled maintenance personnel.

The present invention provides a relatively simple low cost mechanism employing a new geometric plan of elements and a new functional principle of operation which provides a solution to the above set forth complication and limitations of use.

A principal object of the invention is the provision of a fixed magazine for holding a plurality of records in combination with a fixed turntable, a selective record transfer head movable therebetween and a tone arm for playing a record on said turntable, with said transfer head and said tone arm driven and controlled by a single cam rotated by a single motor.

Another object of the invention is the provision of a fixed selector means related to a record magazine for selectively positioning a movable record transfer head for transferring each record in said magazine to a fixed turntable with the selected side of each record uppermost on said turntable for playing.

Another object of the invention is the provision of a fixed turntable having a vertical axis of rotation and a fixed arcuate shaped record magazine for supporting a plurality of records in vertical spaced relation radially p vltioned with respect to said turntable axis and a fixed rector means under said magazine, including a record transfer head pivotally movable about said turntable axis and positioned between said turntable and saidmagazine including means in said head responsive to said selector means for registering said head in position to transfer each record in said magazine to the turntable with a selected side uppermost for playing.

A further object of the invention embraces the conof a record transfer means swingably mounted .g a plurality of records in a magazine and subsequently transferring a selected record from a magazine to a turntable including a single motor driven cam fr "equentially performing both the scanning and record i1 nsfer movement of said transfer means.

A further object of the invention of the record changer is the provision of a fixed magazine for holding a plurality of records in vertical spaced relation positioned in spaced relation from a fixed turntable having a vertical axis of rotation and a record transfer means swingable about the turntable axis positioned between the magazine es Ptent Cir and turntable and a cam for completing all cycles of operation of the record changer for each revolution hereof including transmission means responsive to the movement of the cam for sequentially oscillating the record transfer means about the turntable axis for selecting any record in said magazine and transferring said selected record to the turntable for playing and subsequently returning the record to its initial position in the magazine.

A further object of the invention is the provision of a fixed selector means having a plurality of releasable latches, each latch corresponding to each side of a plurniity of records in a magazine and a movable record transfer means for selectively transferring each record in the magazine to the turntable for playing, including means in said record transfer means for engaging and holding each released latch to lock said record transfer means in position for transferring a selected record regardless of which direction the record transfer means is moved.

These and other advantages in one embodiment of the invention are described and shown in the following specification and accompanying drawings, in which: i

Fig. 1 is a reduced size plan view of the selective record changer;

Fig. 2 is a side elevation of the record changer shown in Fig. 1;

Fig. 3 is a plan view of the record changer mechanism shown in Fig. l with upper parts removed;

Fig. 4 is a side elevation of the mechanism shown in Fig. 3;

Fig. 5 is an enlarged fragmentary side elevation taken generally through section line 55, Fig. 3; I V

Fig. 6 is an enlarged fragmentary plan view of turntable driven elements shown in Fig. 3;

Fig. 7 is a cross sectional view taken through section line 77, Fig. 6; i

Fig. 8 is the same as Fig. 6 with elements in a changed position;

Fig. 9 is a fragmentary side elevation of elements shown in Fig. 8;

Fig. 10 is an enlarged cross sectional view of the selector taken through section lines Ill-10 in Fig. 3;

Fig. 11 is an enlarged cross sectional view of the selector through section lines 11-11 in Fig. 3;

Fig. 12 is a top view of the master cam and selecting elements driven thereby shown in Fig. 3;

Fig. 13 is a fragmentary plan view of a friction coupling shown in Figs. 5 and 12;

Fig. 14 is an en arged fragmentary plan view of the scanning elements shown in Fig. 3;

Fig. 15 is a side elevation of elements shown in Fig. l4;

Fig. 16 is a cross sectional front view taken through section line 1616 in Fig. 15, with elements in changed position;

Fi 17 is a fragmentary perspective view of scanning elements shown in Fig. 14;

Fig. 18 is a view identical to that of Fig. 17, with the elements in changed position;

Fig. 19 is a bottom plan view of the master cam and transfer elements driven thereby shown in Fig. 12;

Fig. 20 is a fragmentary plan view of transfer elements shown in Figs. 3 and 5, and driven by elements shown in v Fig. 2 4 is'a'side elevation of gear-elements shown in Fig; 21;

Fig. 25 is a diagrammatic elevation of elements shown in Fig. 23;

Fig. 26 is a view similar to that shown in Fig. 23 with the parts disposed in changed positions;

Fig. 29 is a top plan View showing an alternate con 7 struction of a master cam and transfer drive elements similar to Fig. 19 embodying the present invention; and

vFig. 30 is a fragmentary plan view similar to Fig. showing the, alternate construction of transfer elements.

In the interest of simplicity of the drawings, the record changer asshown holds only twelve records but it is apparent that the record changer can readily be constructed for a much larger number of records without departing from the spirit and scope of the invention. 7

All components of the record changer are mounted on the upper surface of a base 1 shown in Figs. 1 and 2.

A turntable2 is adapted to rotate in a position parallel V to the surface of base 1 and rotatable about an axis 2a perpendicular to said base 1. An arcuate shaped magazine 3 is secured to the base with its curvature concentrio with the vertical axis 2a of the turntable. 2. A

plurality of equi-spaced slots 4 in the upper portion of the magazine are radially disposed with respect to the turntable axis 2a and are adapted to hold in close relation 2. like plurality of disc records 5 in uniform spaced relation with respect to each other; A tone arm 6 is secured for lateral andvertical movement about and along axis 6a, with its pickup end adapted to swing over the turntable 2. A record transfer head 7 and record transport clamp 8 is adapted for reciprocating movement about axis 24' in a path parallelv to the base 1 indicated by arrow b--b. a

A selector assembly for controlling the movement of transfer head 7 is symmetrically positioned under the magazine 3 and is operated by manual abutments or latches 9 and 10 shown in Fig. 2. Each vertical pair of latches corresponds to the opposite sides (A and B) of each record positioned thereabove in the magazine. The cover plates 11 and 12 are provided as a housing for the mechanism thereunder and projections 13 and 14 thereof provide rests for the record transport clamp 8 when a'record is in playing position on the turntable.

Figs. 3 and 4 show the recorcl changer shown in Figs. 1' and 2 with the magazine 3, cover plates 11 and 12, tone arm 6 and turntable 2 removed. The turntable motor and conventional related drive elements are retained in'their working relationship by bridge member 15 secured by its three legs to base 1 in the position shown. Aplate 16 resilientlysecured to bridge member 15 is the support for electric drive motor 17 and a conventional. pivotally mounted friction wheel 18, which wheel is urged by spring means not shown into driving contact with themotor drive shaft 19'and the inner periphery of the turntable rim illustrated by dotted lines 29. The turntable shaft 21 is secured at one end in the turntable and is adapted to rotate in a vertical bushing 22 secured in the bridge member 15. The lower end of the shaft is adapted todrive the entire mechanism by means to be hereinafter described. r

'The construction of the record changer provides for four general cycles of operation,- namely, selecting, forward transfer, playing and return transfer. All elements rotation of the turntable.

4' r i of the above noted cycles "of operation for the selective playing of each side of each record in the magazine.

Clutch mechanism Referring to Figs. 5, 6 and 7, a radialv pawl wheel 24 is secured to the lower end of turntable shaft 21 by pin 25. A drive pinion 26 having an integral offset arm 27 is positioned for rotation about the outer surface of the lower end of bushing 22 and is retained in its vertical position by C-washer 28. The drive pinion 26 is engaged with teeth 29 defined on the outer periphery of the master cam 23 (see Figs. 3 and 6), A pawl 30 pivotally secured in arm 27 by pin 31 is normally adapted to engage by gravity any of the radial teeth 32 in wheel 24.

Thus when the turntable shaft 21 is rotated by the turntable, the wheel 24 will rotate in the direction shown by arrow in Fig. .6 and pinion 26 will rotate and drive master cam 23 in opposite direction as shown by arrow in Fig. 6. The purpose of the wheel 24 and the pawl 30 is to provide a means for stopping the master cam during the playing of the record and permitting the continued This stopping operation is controlled by a self-energizing sensitive clutch means of the present invention shown in Figs. 6, 7, 8 and 9. Figs. 6, 8 and 9 show a trigger 35 pivotally secured ;to the base ona'fixed shoulder stud 36 which stud is held to the base by nut-37 shown'in Fig. 9. The trigger 35 is normally held in locked position shown in Fig. 6 during the v selecting and transferring of a record by the close prox imity of its projections 38 and 39 with respect to the annular outer surface 40 of the cam 23. An L-shaped' projection 41 of the trigger 35 has riveted thereabove a relatively light auxiliary spring 42 as shown.

involved in these cycles are driven and controlled by master plate cam 23 shown'in Figs. 3, 5, l2 and 19, which can rotate about afixed stud 33, secured to the base 1 by a nut 34. One revolution of the cam will complete all At a predetermined location in cam 23 the annular surface 40 joinsa recess 43 shown in Fig. 8 and posi tioned a predetermined distance from the rec'ess,'an abutment plate 44 is secured to the cam 23 by screw 45 with its projecting end 46 extending outward from the surface 40 and positioned to move ina path above projection 38. When-the cam 23 is rotated in the direction shown by the arrow in Fig. 8, the outer end of the plate 44 will engage trigger projection 39 and move the trigger 35 to the position shown in Fig. 8 by'virtue of the clearance provided for projection 30 by recess 43. When the trigger 33 is in this position, the L-shaped projection 41 is in the path of rotation of the pawl 30.- As the arm 27 continues its rotation, the'lower camming surface 47 of the pawl'30 will engage and depress spring 42 downward and immediately following this movement the leading edge of projection 41 will engage surface 47 and cam the pawl 30 upward, disengaging it from a tooth 32 thereby stopping the rotation of the pinion 26 and the cam 23. The energy stores in auxiliary spring 42 will then 'raise the pawl against the action of gravity a safe distance from the wheel 24. This latter movement is v particularly necessary to prevent momentary res-engage ment of the pawl 30 with the teeth 32 when slight reverse movementof the pinion occurs when the pawl disengagemen't is made under load. there-engagement of the pawl 30 to drive cam '23 can t It is now apparent that Selector assembly Referring to Figs. 3, 4 and 5, the selector assembly comprises two arcuate shaped frame members 51' and 52 which are held together and secured to the baseconcent tle to axis 2a above and parallel to the base 1 by screws 53 and 54 as shown. A plurality, namely twelve, of lower selector latches 9 are slidably arranged in corresponding slots in the lower frame member 51 in uniform spaced relation with each other and radially positioned with respect to the axis 2a. Each of the latches 9 correspond to the A side of each record in the magazine and is positioned directly beneath a corresponding slot 4 in the magazine 3, as shown in Fig. 1.

Referring to Fig. 5, a plurality of latch springs 55 corresponding in number to latches 9 are secured at their inner ends to a retaining plate 56 retained in the selector frame. The outer end of each spring 55 is secured to a hook 57 one provided on each latch 9 for normally urging each lower latch inwardly and upwardly. Each latch 9 is also provided with a notch 58 for engagement with a latch plate 59 for normally holding the latch in its outer position as shown in Fig. 5. It is apparent that if any particular latch 9 is tripped by slight downward movement of its outer end, the latch will move inward toward axis 2a with a latch abutment surface 60 resting against the inner surface of the frame member 51. The tripped position of a latch 9 is shown in Fig. with its inner end 61 in selecting position.

Twelve identical upper latches 10 controlled by latch springs 55 identical with those already described associated with lower latches 9 are arranged in inverted position directly above and in the same manner as latches 9. Each of the latches 10 corresponds to each B side of each record in the magazine 3 and are released by a slight upward movement of their outer ends. The inner end 62 of each latch is positioned for selecting, when tripped, as shown in Fig. 10.

Referring to Figs. 3, 5 and 10, an arcuate upper slide 63 is slidably retained in frame member 52 for rotary reciprocation concentric about the vertical axis 2a. A stop screw 64 limits counterclockwise motion of the slide by contact with the inner end of the frame member. A coil spring 65 secured at one end to the slide and having its opposite end secured to the frame member 52 normally urges the slide 63 into the position shown in Fig. 3. A plurality of equi-spaced inclined cam surfaces 66, corresponding in number to latches 18, are positioned for engagement by the inner surface of projection 67 on each latch it best shown in Figs. 3 and 5. It is apparent in Fig. 3 that when any one of the latches 19 is tripped and moved to its inner position, the engagement of the projection 67 with its corresponding cam surface 66 will move the slide 63 to the position indicated by dotted lines in Fig. 3, and conversely when the last of a plurality of tripped latches 10 is restored the spring 65 will return slide 63 to its rest position shown in full lines.

Referring to Fig. 5, arcuate lower slide 68 is substantially the same as slide 63 and is positioned in frame member 51 inverted with respect to slide 63. The inclined cam surfaces on slide 6% are individually responsive to engagement by the inner surfaces of projections 69 on the lower latches 9.

Referring to Fig. ll, a spring 70, secured at one end to slide 68 and having its opposite end secured to the frame member 53, normally urges the slide in a direction opposite the upper slide 63 and against a stop screw, not shown. Thus the release of any latch 9 by virtue of its abutment 69 engaging a corresponding inclined cam surface in the slide 68 will move the slide about the axis 2a the same distance in the opposite direction as slide 63 is moved upon the release of any latch 10.

A bracket 71, secured to both frame members 51 and 52, as shown, is a support for a switch operating lever 72 pivoted thereto by shoulder screw 73. The upper end of lever 72 is positioned in a slot 74 in the slide 63, better shown in Fig. 3. 72 extends through a slot 75 in the lower slide 68 with its lower end76 bearing against the operating lever of a normally open electric master switch 77, which switch The lower portion of the lever is secured by suitable means to base 1 as shown. When all of the selector latches 9 and 10 are in their normal restored positions, the switch operating lever 72 is in the position shown in full lines in Fig. 11 by virtue of spring action within the switch 77. Thus it is apparent that the release of any one of the latches 9 or 10 by action of the energy stored in their corresponding springs 55 will move slide 68 or 63 respectively and simultaneously move lever 72 to the position shown in dotted lines and overcome the resistance of the spring in switch 77 to close the switch. Upon the restoration of the last tripped selector latch, the lever 72 will assume its normal inoperative position shown in full lines and open the switch. There is sufficient clearance in slots 74 and 75 to permit the operation of the lever 72 by the independent movement of each slide 63 and 68.

Record scanning and positioning of transfer head T he selective transfer of any record in the magazine to the turntable for playing is accomplished by the selective positioning of the transfer head 7 and record clamp 3, shown in Figs. 1 and 2. The oscillatory selecting movement of the transfer head about axis 2a is accomplished by the upper groove 49 in the master cam 23 through a link-work and friction drive, best shown in Figs. 1, 3, 5 and 12. A scanning plate or platform 78 for supporting the transfer head is pivotally secured to bushing 22 by a threaded collar member 79 resting on the upper surface of pinion 26 shown in Fig. 5 and is supported at its outer end by a roller 80 journalled on an axle 82, with the axle fixed in radial alignment with axis 2a to the platform 78 by shifter support 82, better shown in Fig. 15, with the roller held captive in an inner race 83 concentric with the turntable axis 2a in frame member 51.

it has been found that to accomplish all conditions of selectivity, it is necessary that the record transfer clamp 8 be adapted to scan all records in the magazine three consecutive times; thus the platform 78 must complete three excursions of lateral movement. Referring to Fig. 12, groove portions 85, 86 and 87 of groove 49 are intended for the aforementioned scanning movements and the remaining portion 88 of the groove 49 is used while the platform '78 is idle for the purpose of returning the scanning drive element to their normal beginning positions during the forward and return record transfer cycles during the single revolution of the cam 23 required for a complete operation of the mechanism.

Referring to Figs. 5 and 12, there is provided a selector actuating lever 89 which is journalled for rotation at one end about'a vertical stud 90 secured in base 1. A follower roller 9:. is secured for rotation on the lower side of lever 89 and is in permanent engagement with groove 49. A crank plate 92, loosely journalled about collar 79, is provided with an elongated slot 93 in which is positioned a roller 94 secured for rotation and projecting from the upper side of lever 89 as shown. .A friction disc 95 of resilient wear resistant material ispositioned between the lower surface of the platform member 78 and the upper surface of the crank plate 92 and is compressed therebetween by the adjustable tension of spring washer 96 and retaining nut 97 threaded on the lower end of collar 79, better shown in Figs. 5 and 13.

Referring to Fig. 12, when the cam 23 is rotated one revolution, the lever 89 will transmit to plate 92 four complete to and fro movements through the range indicated by dotted lines. Thus, it is apparent that the platform 78 and the transfer head 7 will be driven in a predetermined oscillatory path to scan all records in the magazine 3 shown in Fig. 1. When the movement of the platform is selectively stopped in register with any preselected record, to be hereinafter described, the oscillatory movement of the crank plate 92 will continue by virtue of-the slippage of the friction disc 95 between crank plate inlandthe lower surface .of; the now stationary platform178.

The-construction of the meansforselectively stopping .the platform 78 in its lateral oscillatory movement for selecting a record is best shown in enlarged views in Figs.

.;14, 15, 16, 17 and 18, which figures also include the elements for conditioning the transfer head '7 to present the selected side of'each record uppermost on the turntable foriplaying The shifter support 82 holds in vertical alignrent a compound registration beam 99 which is pivoted for vertical movement to the head. support member 93 by a transverse pin retained in member 98 by suitable means as shown. The frame of the beam 99 consists of vtwo spaced plates 101' and 102 each having a'pair ofout- V wardly extending ears 103 and 104. Each pair of cars "serve as supports for eachofa pair' of oppositely disposed pawls 105 and 106 respectively, as shown; Each of the pawls is urgedinto the position shown in Fight by independent coil springs 107, one of which'is shown in Fig.

' 15. The inner legs of the pawls 105 and 106'shown in dotted lines in Fig. 14 serve as stops when bearing against the outer'surface of each plate 101 and 102 respectively.

A selector latch restore bar 108 slidably positioned be-' tween plates 101 and.102acompletesthe beam structure which is supported at. its v outer end in vertical slot 109 in support 8. A'curved shifter plate 110, better. shown in Fig 16, is slidablytr' etained to support 82 by shoulder screws 1111 11 and is provided with an'inclined cam surface .112for operating the hem and an appropriate clearanceiaperture 113 therefor. A'notch 114' in the upper edge of the plate 'is provided to engage one end of a toggle. lever 115 tolbe hereinafter described. It is now apparent that when the shifter plate 110 is moved from the position shown in full lines to the position shown in dotted lines, the cam surface 112 will raise the beam 99 about pin 100 in slot 109 to its upper position shown I in Fig. 15; When the beam 199 is' in its lower position, shown in Fig. 16, the pawls'105 and 106 will travel in a I lateral path to engage and temporarily'retain therebetween any one of the tripped lower selector latches 9.

and when the beam is in itsupper position, the pawls are positioned to engage and. temporarily retain therebetween any one of the tripped upper selector latches 10. The toggle lever 115 is secured to the upper endof an axle 1116 journalled for rotation about a vertical axis in bracket 117 secured to platform '78 as shown. Thefouter end of lever 115 is in working engagement.withnotch 114 in plate 110 and its inner end is in engagement with a similar first shift the plate 110 to its opposite position and then .notch in a secondary shifter 'pIateHS'to'be hereinafter I described. A'conventionaltcom ression ty etoggle spring assehibly119 is pivoted. to stud 120 in the lever 115 and stud 121' in bracket :117, thusiproviding a detent means for brgin iandholdingithe' lever .115 and thef plates 110 and 1'18 infeach of their twopositions as shown in full and. dotted lines iniFig. 14.

' Referringt'o Fig.5, theiselector restore bar'108 is adapted for longitudinal and vertical movement on a .coaxial roller 123 supported by pin 100 and shoulder stud 122 which studis supported by plates 101 and 102 shown a in Fig. 15. A spring'124 secured atone end to pin 125 in support 98 and secured at its opposite end to projection 126 normally urges the bar 108into a position as shown in Figs. 5 and 14, with its jaw end 127 withdrawn inwardly from theouter ends of the pawls 105 and 106;

Because of the inclined position of the spring 124, the bar is simultaneously urged upward for a trigger action to be hereinafter described. A slidable rack member 128', shown in Fig. 5, for driving :the transfer head and operating therestore bar 108 is'positioned in a rectangular channel-1 29 in head support 98; which" channelv is positioned 'in' longitudinal radial alignment with turntable axis 2a and the restore bar 108, shown in Figs. 3. and 5. Rack teeth 130. in the upper surface of the slide are normally engaged with a pinionlfil for driving the transfer head 7. A retainer plate 132 seclockwise movement of the platform 78 about axis' la as viewed in Fig. 3. is limited by the contact of the end 137 of shifter plate 110 abutting against stop bracket 135, to

to arrest the motion of platform 78 and the transfer head carried thereon. Whenthe platform 78 is driv'en'to its u extreme opposite position about axis 2a, the end 138 of' the shifterplate 110 will abut against stop bracket 136 and first movethe plate '110 to its opposite position and then arrest the platform 78 and the transfer head carried thereon.

Perspective Figs. 17 and 18 showthe two positions assumed by the beam 99 for selectivelyplaying each side of a record. Fig. 17 shows the beam 99 resting on the V lowermost portion of camming surface 112 with the pawls and 106 carried thereby engaging therebetw een the inner end 61 of a tripped latch 9. This engagement will arrest the lateral movement of the platform 78 and register the transfer head with a record in the magazine corresponding to the engaged latch 9. This lower position of the beam 99 corresponds to the dotted line-position of the toggle lever 115' shown in Fig. 14 for conditioning the transfer head to transfer a record with theB side of p a a record uppermost on the turntable for playing.

Fig. 18 illustrates the same elements shown in Fiig. 17'

with the shifter plate 110 moved to its opposite position which movement has positioned beam 9 9 on the, upperm ostportion of the cam surface 112 with its pawls 1115 and 106 in'engagementwith the inner end 62 ofone tripped latch 10, which corresponds to the full line. position of the toggle lever 115 shown in Fig. 14 forconditioning the transfer head 7 to place the A side of a record uppermost on the turntable for playing. The movement of the beam 99 into either its upper or lower position will result in the temporary locking engagement of any. tripped latch with the pawls 1G5 and 106 by virtue of .the inward camming movement of either pawl against the restrain ing action of their independent springs 107 shown in Fig.

15. Thus oscillatory movement of the platform 78 in either direction with the beam 99 in either itsupper or} lower position will engage anytripped latchin'the path of movement of thepawls'105 and 106...

Referring to Figs. Sand 17, the restoration of each V tripped latch occurs during thefinal movement of thereturn transfer cycle. During'the forward transfer'cycle, the rack member 128 will-have moved towardthe axis'fZa and thus the inner end of the restore bar 108 will assume 7 its upper position with latch end-134 in the path of movement of the restore end 1330f rack member '12 8-by virtueot the vertical force component of spring 124.; There turn movement'of'rack'member 128 will. engage its end I I 133 withthe bar end 134 andmove the bar and itsjaw 127 to a position shown by dotted lines in Fig: '14,: thereby engaging and restoring the tripped latch previously; held betweenthe pawls 105 and 106to its normal're-latch position. Following the restoration of each latch'the cam surface 139 of restore bar 1&8 shownin Fig.5 will have moved the bar sufiiciently downward against the restraining action of the spring 124 to releaseengagement of latch end 134 fromend 133 of rack member 128, thns returning the'bar to the position shown in Fig. 5 ,with

end 134 under end 133 permitting the same-restored'sele'ctor latch to be re-tripped without interference from the jaw 127. 1

Movenz'entlprodwcing means jfor recordtrd'risfer The record transfer cycle which includes the clamping of a selected record and transferring the, same to the turntable with the selected side uppermost and then unclamping the record for playing and the reverse operation thereof, to restore the record to its original place in the magazine, is accomplished by the transfer head 7 and its associated record clamp 8 shown in Figs. 1 and 2. The drive for operating the head 7 originates in groove 48 in the lower face of the master cam 23 shown in Fig. 19. The portion of the groove 48 subtended by the angle 140 has a constant radius in order that the transfer elements remain in inoperative position during the previously described selecting cycle. The radial angle 141) is identical to the sum of the radial angles subtended by portions 85, 86 and 87 of the groove 49 in the upper face of the cam 23. The portion of the groove 48 subtended by the angle 141 is utilized for driving the transfer head through its complete forward transfer cycle and the portion of the groove 48 subtended by the angle 142 is utilized to drive the transfer head through the return transfer cycle. The portions of groove 48 subtended by angles 141), 141 and 142 are also designated by reference numerals 140, 141 and 142, respectively. When the cam 23 is stopped for the playing cycle, the roller 147 is positioned at the outer apex junction of groove portions 141 and 142. It is also to be noted that during the complete forward and return transfer cycle and resulting movement of arm 145, Fig. 19, that lever 89, Fig. 12, is moving through portion 88 of groove 49 in order to begin its entry in portion 85 for a subsequent selecting cycle.

Referring to Figs. 3, 4 and 19, a hub 143 is adapted to rotate about a vertical stud 144 fixed at its lower end in the base 1. A transfer crank arm 145 is secured to a lower flange 146 of the hub 143 and carries at its outer end a follower roller 147 projecting into engagement with groove 48. An upper crank arm 148 is secured to an upper flange 149 of hub 143 and terminates at its outer end in a quadrant gear 150. The quadrant gear is permanently engaged with gear 151 which is an integral part of a secondary transfer cam 152 journalled about bushing 22, better shown in Figs. and 20. Again referring to Fig. 19, for each revolution of the master cam 23, the arms 145 and 148 will move to the position shown in dotted lines and return to the position shown in full lines, thus completing a complete transfer movement. This movement will impart one clockwise and one counterclockwise cycle of rotation to cam 152 by virtue of the quadrant gear 150 meshing with the secondary cam gear 151.

Referring to Figs. 5 and 20, cam 152 has therein a groove 153 which is generally spiral in shape and modified to equalize variable torque requirements of the transfer head 7. Roller 154 positioned for engagement in groove 153 is secured for rotation by vertical stud 155 anchored in rack member 128 slidably retained in channel 129. When cam 152 is rotated to position shownin dotted lines about bushing 22 by the action of gear 151, the roller 154 in engagement with the cam will withdraw rack member 128 a predetermined distance 156 shown by arrow in Fig. 20. The rack member 128 will complete one reciprocal movement to operate the transfer head one complete forward and return transfer cycle. It is to be noted that the platform 78 carrying the support 98 has a range of selecting movement indicated by arrow 157. Thus the cam 152 must be rotated for each transfer an angle equal to the sum of the angle required for the radial movement of bar 128 and the selecting angle 157 in order to accommodate the various positions assumed by the platform 78 when arrested in register with any record in the magazine.

Record transfer head and clamp Referring to Fig. 21, the transfer head 7 consists of vertical frame members 160 and 161 secured to support 98 by suitable screws as shown. A trunnion member 162 is journalled for rotation about horizontal axis 162a in vertical members and 161. One projecting hub of trunnion 162 is secured to a mutilated gear 163, better shown in Fig. 24, which gear is adapted to be intermittently driven by a mating mutilated gear 164. The latter gear is secured to the outer end of jack shaft which shaft is journalled for rotation in vertical members 160 and 161 and adapted to be driven by pinion 131 which is positioned midway between the frame members 160 and 161 as shown in Figs. 5 and 21.

During a complete cyclic movement of shaft 165 and gear 164, the gear 163 will be driven intermittently through a predetermined angle of rotation, to rotate the trunnion 162 to transfer a record from the magazine to the turntable and upon the reverse cyclic rotation of shaft 165 and gear 164, the intermittent movement imparted to trunnion 162 will retum-transfer a record from the turntable to its initial position in the magazine.

Referring to Figs. 21, 22, 23 and 24, gear 166, having a pitch diameter the same as gear 163, is provided with a hub 167 adapted for rotation in a bore in trunnion 162 concentric with the axis 162a. The inner end of the hub 167 terminates in an elongated toggle 168 positioned adjacent the shaft 169 shown in Fig. 23. Gear 170 positioned on shaft 165 is secured to and driven by gear 164 and has the same pitch diameter as gear 164. Thus rotation of the shaft 165 will rotate gear 170 and impart opposite rotation to gear 166 for the purpose of rotating toggle 168 through a 90 angle of movement with respect to trunnion 162 for clamping and unclamping a record within the clamp 8.

Referring to Fig. 4, the record clamp 8 is provided with pivoted outer jaw 171 having V-shaped gripping surfaces on its inner periphery. The jaw is loosely retained to the outer end of clamp 8 by pivot 172. The inner jaw 179 is slidably secured in hub member 175, better shown in Figs. 21 and 23. The cylindrical portion 174 of the hub is positioned for reciprocation and rotation in a bore 175 in the trunnion 162 at right angles to the axis 162a. A record turning cam 176 has a cylindrical hub 177 also adapted for rotation and reciprocation in the bore 175, as shown in Fig. 23. One end of shaft 169 is secured in a coaxial bore in cam 176 by pin 178. The opposite end of shaft 169 terminates in inner jaw 179 for gripping the edge of a record opposite that from the outer jaw 171. A hexagonal bushing 18%) is secured concentrically to shaft 169 by pin 169a and is adapted for reciprocation in a hexagonal pocket 181 in hub member 173. A coil spring 182 around shaft 169 in a clearance pocket in the hub member 173 normally urges the hub member 173 and the hexagonal bushing carrying shaft 169 with hub 177 in opposite directions. When the toggle member 168 is moved to the position shown in dotted lines, hubs 173 and 177 will move equal distances toward each other thus moving the inner jaw 179 and the clamp 8 with its outer jaw 171 equi-distantly toward each other for clamping a disc record therebetween under the force supplied by spring 182. Thus it is apparent from Figs. 1 and 2 that when the clamp 8 is positioned over a selected record, the first movement of shaft 165 will result in the record being firmly clamped between the inner jaw 179 and the outer jaw 171 of clamp 8.

Referring to Fig. 21, the secondary shifter plate is journalled for lateral reciprocation in a pair of slots in frame members 160 and 161 and has a spherical stud 183 secured in an integral offset ear thereof, better shown in Fig. 23. The position of the plate 118 is controlled by the movement of lever 115 shown in Fig. 14 engaging notch 184 in the lower edge of the plate. When lever 115, shown in Fig. 14, is shifted to either of its two positions, the plate 118 will alternately occupy the posi- 75 tion shown in full lines and the position shown in dotted portion of spindle in the outer end'of crankZfitlis normally positioned lines, Fig. 22 movement positions thefstud 183 toeither of twopositions corresponding to the playing:

of opposite sides of each. record. Stops 185 and. 186 integral with plate 118 bear against the frame members 160 and 161 respectively to accurately position the stud 183 with respect to cam 176.

Referring to Fig.25, the cam 176 has cut in its outer. spherical face two Y'-shaped grooves 187 and 188 dis-' posed equi-distant from the turning axis 176a. The trunnion 162, as shown in Fig. 23, is in its normal rest posi i r2 groove of a. record to be played.v The latter part of thisinward. swinging movement .is accompanied ,by -the lowering of the vertical .spindle 197 by the action of the v leading surface of the inclined cam 204 to lower. the

tion. After the clamping of the record by the ninety 7 degree rotation .of toggle 168,'the trunnion 162'is ro-,

tated about axis 162a to withdraw airecord fromthe magazine. shown in Fig, 26, th e stud 183 will enter groove 133 in the cam and begin the rotation of the cam and'the hub member '173jto' rotate the clamp 8 and the record ninety degrees from .its vertical position. Continued At a predetermined. angle of'rotation, as

rotation of the trunnion in .the'same direction will place the record in horizontal position ontheturntable for playing with its B side uppermost for playing. It is now apparent that when the trunnion 162is rotated in opposite direction to return the record to the magazine, the stud 183 .will re-engage the same groove 188 and rotate the hub 173 ninety degrees in reverse direction in order to return the record to its original verticaliposition. in the magazine. When the plate 118 is moved to the position shown in dotted lines, Fig. 22, and the,trunnion 162' is rotated, the stud 183 will engage groove 137 in the cam and rotate the cam and hub 173 ninety degrees in opposite direction to position the A side of the record uppermost on the turntable; The dual rotation of the cam 176 for rotating about axis 176a is illustrated ,in

Fig. showing both'ultimate playing positions of the clamp 8 in dotted'lines.

Q Referring to Figs. 21, 22 and 26,;four upper guide blocks 189, 190, 191 and 192 integral with frame members 160 and 161 are shown for abutting and guiding the outer rectangular surfaces of hub 173 and cam 176 during 7 their simultaneous rotation aboutaxes 162a and 176a,

Rest position stops 193 and 194 also integral with frame members 160 and 161 respectively serve as a rest for the hub "173 when the :trunnion 162'is in its rest posi-' tion with the clamp 8 over the magazine. A spacer 195 shown in section, Figs; 23 and 26 and better shownin Fig. 3, is secured to frame members 160 and 161 as a stop for the hub 173 when the trunnion 162 is' in playing position. a

7 Tone .qrm support and control means therefor Referring to Figs. 3, 4 and 27, a tone arm support 196 issecured to .the base 1 by screws, as shown. A vertical spindle 197 is journalled for rotation and reciprocation in bearings198 and 199 integral withthe support 196. A tone arm crank 200 is fixed to the lower as shown.

the turntable. The upper tone arm mount 205, shown in. Figs. 3 and 4, is part of the construction for pivoting the, tone' arm for vertical movement. and for holding the same in rest positionqthe construction of-which is fully described in'applicants copending U. 'S. patent application,.Serial No. 180,291. 7

Referring to Fig. 12, the inclined portion 206' of 'the,

groove is used to move the follower pin 201, shown in Fig. 27, and the tone arm inward over the starting A follower pin 2%? An inclined depressed cam' needle into' playing contact with the'starting groove.

At this point, the follower pin201is in the clearance" pocket 207, as shown in full lines, at which position: the movement'of the cam 23 is arrested'and the needle and tone arm are free to follow the record groove to its cutoff postion indicated by the dotted positionofpin 201, at which time the'outer end 203 of thejcutoif lever 202 Will'contact and move trigger 35, shown in 'Figf27' The first movement 7 to begin the reverse transfer cycle. of the cam23 following the playing of the record will by action of the trailing incline of cam 204'raise spindle 197 to disengage the needle from the record. Concur-.v

rent with this movement, the inclined surface 208joff pocket 207 will cam pin 201 outwardly and rotatethe spindle 197 to return the tone arm to its normal rest position. V t A simple electric circuit, not shown, connecting the master switch 77, shown in Fig. 10, in series withjmotor" 17, shown in Fig. 3, to a source of electric. power will stop and start the motor 17 dependent uponthe switch 77.1

Operation Thecomplete operation of the mechanism willbedescribed by first assuming his in rest position, as shown:

in Figsil and 2, with-thetransfer head in its mid-posh tion, all selectorlatches restored, and the registration 7 beam 99 in its lower position, as shown in Fig. 17. This lower position of the beam 99 resulted from the previous;

playing of the side A=of a record. Furtherassuming that the B side of the record designated as A-B inlFig; 1 is selected for play," then the upper latch-10 under" the record is tripped and referring to Fig.3, the inward.

movement of the latch will cam the upper slide-63 :to' i the position shown in dotted lines, and move .lever 7 -2,

shown in Fig. 11, to the position shown in dotted lines and operate switch 77 to complete acircuit, not shown,

to motor 17. The rotation of the motor'shaft' 19 will drive the turntable, shown in Fig. l, ina clockwise direction by the action of the friction drive wheel 18, shown in Fig. 3, thus imparting clockwise rotationto shaft-21.

Shaft 21 will drive master cam 23 counterclockwise through. the clutch and pinion 26, shown in Fig.-;6.

Referring to Fig. 12; the actuating lever 89 will'ifirstg be moved to the position shown. in-dottedilinesby 1301'! I tion of groove 49, which movement will drive the;

platform 78, shown in Fig. 3, and the transfer head thereon to its extreme counterclockwise: position by Near means of thefriction coupling, shown in Fig. 13. the end of this movement .of the platform 78 and, refer: ring to Figs. 17 and 3, the working end 137 of shifter plate will be arrested by bracket 135. The complee 7 tion of the counterclockwise.movement of the platform. will move shifterplatelltl with respect to the platform,

and raise beam99 to itsupper position, shown in Fig. 18, with its pawls 105and 106 now in position to scan the; inner ends of latches 10. This shifter movement will overcome the restraining action of the toggle spring assembly 119 and movetoggle lever andrsecondary shifter plate 118 to the. position shownby dotted lines in Fig. 14, for the' purpose of positioning thespherical stud 183 tothefposition shown in dotted lines in Fig 22. Qentinned'rot'ation of the cam 23 will new drive the platform and transfer head in a clockwise direction by the'action of the portion,86 of'the groove 49. 'As

the platform,78 approaches registration with the tripped latch 10, pawl 106 will cam inward and over the end of the latch 10 and the pawl 105 will serve as a stop against the latch to stop and lock the platform in proper registration as shown in Fig. 18.

Referring to Fig. 12, thecontinued movement ofcam,

23 will continue the movement of lever 89 and crank 13 plate 92 until the roller 91in the lever 89 has reached the end of the groove portion 86 and through groove portion 87 to complete the selecting cycle 'of the mechanism. This movement will again place the lever 89 and the plate 92 in position shown in dotted lines having completed three oscillatory movements, with the portion of this movement following the latching-of platform 78 overcoming the friction of the coupling shown in Fig. 13. It is thus apparent that any tripped latch will intercept and stop the movement of platform 78 with the record clamp 8 in register over the record corresponding to the tripped latch.

During the above described portion of rotation of cam 23 and referring to Fig. 19, the roller 147 in the transfer crank arm 145 was following the radial portion 140 of the groove 48, thus holding the lever 145 and related transfer elements in fixed position. The forward transfer cycle begins with the entry of roller 147 into the portion 141 of the groove 48 which will rotate arms 145 and 148 about stud 144 to rotate gear 151 and secondary transfer cam 152, shown in Fig. 20. The clockwise movement of cam 152 will engage roller 154 at a time dependent upon the position of the platform 78. Continued movement of the cam 152 will begin the withdrawal movement of rack member 128. Then referring to Fig. 23, the pinion 131 will rotate jack shaft 165 in a counterclockwise direction and by the action of gears 166 and 170, shown in Fig. 21 and previously described, will rotate the elongated toggle 168 from a position shown in full lines to the position shown in dotted lines to permit equal and opposite longitudinal movement of hubs 177 and 174 under the restraining action of spring 182 to clamp the selected record in the magazine between the jaws 179 and 171 better shown in Fig. 4.

Because of the timed relation of gears 163, 164, 166 and 170 and at the completion of the clamping movement of the toggle 168, the leading tooth in gear 164 will engage a corresponding tooth in gear 163 and begin the rotation of trunnion 162 about axis 162a to withdraw the selected record from the magazine. The dotted or clamped position of the toggle 168 will remain the same with respect to the trunnion by virtue of the equal pitch diameters of the clamping and transfer gears.

When the trunnion has reached the position shown in Fig. 26, the record will have been completely withdrawn from the magazine and in position to be rotated about axis 176a in a direction for playing the A side of the record, which rotation is accomplished by the entry of spherical stud 183 into Y-groove 187 in cam 176 as illustrated in Fig. 25. Continued rotation of the trunnion about axis 162a will rotate the cam 176 and clamp 8 about axis 176a and place the record on the turntable with the A side uppermost for playing. In this case for playing the A side, the record clamp 8 will be in position shown in dotted lines adjacent to the uppermost edge of the turntable shown in Fig. 1. At this point of the rotation of the trunnion, the teeth of the gear 164 will disengage from the teeth in the gear 163 to stop the rotation of the trtmnion. The continued withdrawal of slide member 123 and the continued rotation of jack shaft 165 and gears 166 and 170 will rotate the toggle 168 with respect to the trunnion and cam apart the hubs 177 and 174 to release the selected record from the record clamp 8 on the turntable for rotation thereby, which completes the forward transfer.

Referring to Figs. 12 and 27 and simultaneous with the above mentioned unclamping of the record on the turntable, the follower pin 201 for controlling the lateral position of the tone arm, shown in Fig. 27, which during all previous operations has been engaged in the concentric portion of the groove 50, shown in Fig. 12, will be moved inward by the inclined portion of the groove 206 to swing the tone arm over the record with the needle in position to engage the starting groove thereof. During the latter portion of this swinging motion the lower end of the tone arm spindle 197, Fig. 27, will be lowered by the leading surface of the cam 204, to the position shown in dotted lines in Fig. 27, which movement will lower the tone arm and engage its needle in the starting groove-of the record. immediately following the lowering of the tone arm, the rotation of the cam 23 is stopped by the action of the clutch previously described and shown in Figs. 6, 7, 8 and 9. The tone arm and the needle therein will then follow the spiral groove in the rotating record with the follower pin 201 moving from the position shown in cross section, Fig. 12, to the position shown in dotted lines, at which time the outer end 203 of the cutoff lever 202, shown in Fig. 27, will engage and move the trigger 35 to swing its L-end 41 outward, as shown in Fig. 6, and permit the clutch pawl 30 to gravitate into re-engagement with the rotating pawl wheel 24 to again start the rotation of the cam 23 which movement completes the playing cycle of the mechanism, and marks the beginning of the reverse transfer cycle.

The return transfer movement is accomplished by the action of the portion 142 of the groove 48, shown in Fig. 19, wherein the roller 147 will be moved from the outermost apex of the groove 48 to its innermost concentric portion shown in dotted and full lines, as shown in dotted and full lines in Fig. 19. All operations described during the forward transfer are repeated in reverse order during the reverse transfer movement, including the deposit of the record in the same position in the magazine as previously occupied and followed by the unclamping of the record from the record clamp 8. During the first portion of the unclamping movement of the rack member 128, shown in Fig. 3, its outer end 133 is engaged with the latch end 134 of the bar 108 causing the bar 1118 and its jaw end 127 to move therewith toward the tripped latch 10 and against the restraining action of its spring 124, shown in Fig. 5. When the latch 10 is engaged by jaw 127 and moved into its restored position, then the cam surface 139 will move the bar 108 downward and disengage its latch end 134 from the restored end 133 of slide 128, thus permitting the spring 124 to retrieve the bar 108 to restored position, shown in Fig. 5. The selector latch 10 will remain in restored position by virtue of notch 58 of the latch engaging latch plate 59, shown in Fig. 5.

Since it was assumed that only one latch 10 was tripped, the upper slide 63 will return to the position shown in full lines in Fig. 3 by the action of spring 65. This movement will permit the lever 72 shown in Fig. 11 to move to the position shown in full lines and open the switch 77 and stop the driving motor 17, thus arresting the motion of the cam 23 and completing the return transfer cycle of the mechanism.

In order to play the A side of a selected record, any selector latch 9 may be tripped and action of slide 68, shown in Fig. 11, will move lever 72 to the same position as previously moved by slide 63 to close the switch 77 and again begin the rotation of cam 23. Since the plate was left in the position, shown in Fig. 18, with the beam 99 in its upper position, the first motion of the platform will be counterclockwise to the end of its stroke,

which motion will not affect the position of the plate, then the platform will next be moved clockwise by the cam to its other extreme position, the latter portion of which movement will cause the working end 138 of plate 110 to be moved by bracket 136 shown in Fig. 3, to the position shown in Fig. 17, with the beam 99 in its lower position. Thus the next counterclockwise motion of the platform 78 will result in the engagement of pawls 185 and 106 with the tripped latch 9, with the record clamp 8 in register with the selected record. When the plate 110 was moved to the position for playing the B side of the record the secondary shifter plate 118 was simultaneously moved to the position shown in full lines in Fig. 14.

The transfer cycle for playing the A side of the record dis 7 is identical to that previously described for playing the B 7 side of a record except that the spherical stud 183, shown in Fig. 22, is positioned as shown in full lines in order to engage the Y-groove 188 in the turning earn 176, shown in Fig. 25, in order to turn the record clamp and record contained therein in opposite direction about the axis 116a to place the A side of the record uppermost of the turntable as indicated by the dotted position of the clamp 8 around the lower edge of the turntable shown in Fig. 1.

Referring to Figs. and 17, it is now also clear that the restoring action ofbar 188 responsive to the movement of rack member 128 will move the tripped latch 9 to its restored position during the unclamping of the corresponding record in the magazine followed by the release of the restore bar 108 to its normal inoperative position shown in Fig. 5. 'VVhen a'plurality of selected latches 9 and 1G or both are tripped,'the mechanism will sequentially play all selections and upon the completion of the play- :ing the last record and the restoration of the latch correthese records in proper sequence.

Modification Illustrating another embodiment of a transmission responsive to the rotation of cam 23, Figs. 28, 29 and 30 show the use of quadrant gear drives for both the selecting and transfer cycles. The cam 23a, substantially the same as cam 23 previously described, has transfer groove 48 in its upper surface thereof and the selecting groove 49 in its lower surface. i

Fig. 28 illustrates a lever and gear drive for accomplishing the oscillating movement of platform 78 by eliminating the lever'89 and the crank 92 shown in Fig. 12. Crank arm 209 carries at its outer end a roller 210 in permanent engagement with groove 49 in the cam 23a. A segment gear 211 is secured to arm 209 by means of hub219 with its teeth in timed engagement with pinion 212, which pinion is integral with friction disc 213, the latter replacing the plate 92, shown in Fig. 13. Thus it is apparent that when the cam 23a is rotated, the arms 2G9 and 211 will pivot about stud 144 and drive pinion 212. The platform 78 will be oscillated in the same manner as when driven by the lever 89, shown in Fig. 12.

Figs. 29 and 30 illustrate a direct connected link work for driving the transfer head 7 utilizing a crank and a connecting rod instead of the secondary transfer cam shown in Fig. 20.

Referring to Fig. 29, the pinion gear 151 has integral therewith a crank arm 214. A connecting rod 215 is pivotally connected to the crank arm by pin 216. The crank arm 145 and the crank arm 148 are substantially the same as shown in Fig. 9, but with a modified relation to each other in their mounting to an independent hub 218 journalled on stud 144. The quadrant gear and pinion 151 are proportioned to rotate'the crank 214 one hundredeighty degrees and return for each revolution of cam 23a.

Referring to Fig. 30, the connectingrod 215 is pivotally connected to rack member 128 by pin 217. Thus the one hundred-eighty degree counterclockwise rotation of gear 151 will, by virtue of the crank 214 and the connecting rod 215, withdraw bar 128 and complete the for- 16 r parted to the rack member 128. Because of the angular displacement of the rack member from the fixed central position of the crank 214, this unnecessary movement will not aifect the normal operation of the mechanism because the elongated toggle 168 shown in Fig. 23 will not eifect.

the clamping of a record until it has moved at least thirty degrees. Furthermore, the slight indefinite outer position of rack member 128 will not elfectthe restoration action of the selector restore bar 108 for the reason that its end 134 will have tripped from the end 133 of the rack member considerably before the rack member has reached the end of its stroke. rack member 128 with respect to movement of the platform 78 into any one of its positions because of the useof the connecting rod 215 instead of the cam 152 is not important. V

It will be apparent to those skilled in the art that the present invention is not limited to. the particular constructions shown or method of employing the same, and that changes and modifications may be made without departing from the spirit and scope of the present invention. It is aimed in the appended claims to 'cover all such changes and modifications.

What is claimed as new and desired to be secured by Letters Patent of the United, States is: p

'1. In a record changer of the character described means forminga base, a turntable secured to said base for rotation about an axis vertical thereto, a record magazine secured to said base in spaced relation with said turntable for retaining therein a plurality of disc records in vertical equi-angular spaced relation, each of said records being supported in equi-distant radial position with respect to said axis, a fixed selector secured to said base including a plurality of movable abutments retained in said equiangular spaced relation and normally positioned equi-distant from said axis, each of said abutments corresponding to a diiferent one of said records and supported for predetermined displacement toward said axis for selecting the respective ones of said records, a record transfer means pivotally secured to said base and mounted for lateral oscillatory movement about said axis for scanning said records in said magazine when oscillated, drive means for oscillating saidtransfer means, a pair of'pawls pivotally mounted on said transfer bar for movement past the ones of said abutments'corresponding to nonselected records and for engagement with the ones of said abutments which are displaced toward said axis and correspond to selected records, said pawls being normally spaced apart by a distance substantially equal to the thickness of each of said abutments, spring means for biasing said pawls in opposite directions toward said normal positions so that the selected ones of said abutments are adapted to beengaged and held by said pawls irrespective of the direction of movement of said transfer means relative to said abutments thereby to arrest and hold said transfer means in register with a selected record in said magazine corresponding to a selected displaced abutment. r

2. In a record changer of the character described means forming a base, a record transfer means including a record transport head pivotally secured tosaid base for oscillatory movement in a predetermined angle about an axis vertical thereto, an arcuate selector secured to said base in uniform proximity to the path of'movement of the outer end of said record transfer means, a plurality of movable lower abutments retained in said selector in radial equi-angular spaced relationwith respectto said axis and normally positioned equi-distant from said axis, each of said abutments adapted for predetermined displacement toward said axis, a plurality of like upper movable abutments retained in said selectorv in like positions in predetermined spaced relation to said lower abutments, a registration member having pawl means retained on its outer end secured for'vertical movement to a the outer end of said transfer means and positioned to scan said lower abutments when in its lower position and Thus the error in the positioning of the a i? positioned to scan said upper abutrnents when in its upper position when said transfer means is oscillated, shifter means engaged with s. id member and secured for predetermined lateral movement with respect to said transfer means for moving said member from its lower position to its upper position and vice versa when shifted from one position to its other position, independent stop means on each side of said base for alternately engaging opposite ends of said shifter and moving same to each of its two positions near the end of each alternate movement of said transfer means, drive means for oscillating said transfer means whereby the operation of said drive means and completion of movement of said transfer means in one direction will engage one end of said shifter with one of said stop means to move same and position said member and pawls to scan said lower abutments and whereby the completion of the next opposite movement of said transfer means will engage said shifter plate with the other of said stop means and return the same to raise respect to a vertical axis, a plurality of equi-spacedlatches movably retained in a row in said frame concentric with and equi-distant from said axis, each of said latches having an integral abutment positioned for predetermined movement with respect to the concave side of said frame when moved to released position, each of said latches including latching means for engagement with said frame for normally holding each said latch and its said abutment in said normal rest position, a projection integral with each of said latches extending substantially normal to the path of movement thereof, independent spring means secured to each latch and said frame for normally holding each of said latching means in engagement with said frame and for urging each of said latches and its said abutment toward said released position, an arcuate slide member retained in said frame and adapted for reciprocating movement concentric about said axis, a plurality of integral inclined cam surfaces in one side of said slide, each of said cam surfaces corresponding with and positioned in the path of movement of each of said projections, a second spring means secured to said slide member and said frame for urging said member into a normal rest position, electric switch means for controlling an electric circuit when operated, said switch means operatively positioned in fixed position with respect to said frame and adapted to be operated by said slide when the latter is moved whereby the predetermined movement of each of said latches will permit its corresponding said spring means to release said latch and move its corresponding abutment to said released position and concurrently engage its said projection widi a corresponding said cam surface and move said slide against the restraining action of said second spring means to operate said switch means and whereby the restoration of the last of a number of released said latches to its retracted position will permit said second spring means to return said slide and said switch means to their normal positions.

4. In a record changer of the character described means forming a base, an arcuate selector secured to'said' base concentrically positioned with respect to an axis vertical to said base, a plurality of equi-spaced latches movably retained in said selector in a row concentric with and equi-distant from said axis, each of said latches adapted for movement from a restored position to a released position with respect to the concave side of said selector, a platform member for scanning said latches having one end thereof pivotally secured to said base and journalled for oscillatory movement about said axis, a registration member secured to the outer end portion of opposite end of said lever terminating in a quadrant gear,

said platform, a pair of pawls mounted on said registration member near the outer end thereof for pivotal movement about axes which are parallel to one another, spring means for biasing said pawls in opposite directions so that said pawls are adapted to engage each of said released latches to arrest the movement of said platform when oscillated from either direction for registering and holding said platform in predetermined radial positions, a latch restore member retained by said registration member for radial reciprocation between said pawls with its outer end in longitudinal alignment with any one of said latches in released position retained by said pawls, driving means on said platform for radially reciprocating said restore member through a predetermined stroke when operated for moving said restore member into engagement with and restoring said one of said latches to its said restored position.

5. In a record changer means forming a base, a record transfer means having a bearing in one end thereof journalled on a support fixed to said base for oscillating movement about an axis vertical to said base, the opposite end of said transfer means supported for movement on an annular support fixed to said base concentric to said axis, said opposite end adapted to scan a fixed selecting means in two directions, said selecting means secured to said base and adapted to engage and hold said transfer means in any of a plurality of predetermined selected positions when operated, a crank plate journalled for oscillating movement on said bearing for intermittently driving said transfer means, spring means secured on said bearing for urging said plate into predetermined frictional engagement with said transfer means, a plate cam having a continuous groove in one surface thereof secured for rotation on said base parallel thereto, a follower lever pivotally secured at one end to said base and pivotally retained at its opposite end to said crank plate positioned for movement parallel to said base, a follower means secured to said lever extending into said cam groove and adapted to be moved thereby, said groove formed to move said follower lever and said crank plate a predetermined number of sequential movements in opposite directions during a predetermined angle of rotation of said cam whereby the rotation of said cam through said angle of rotation will oscillate said transfer means into engagement with said selecting means when operated in any of said predetermined positions and whereby said plate will overcome its said frictional engagement with said transfer means and complete said predetermined number of sequential movements.

6. In a record changer, a base, a record transfer means having a bearing in one end thereof journalled on a support fixed to said base for oscillating movement about an axis vertical to said base, the opposite end of said transfer means supported for movement on an annular support fixed to said base concentric to said axis, said opposite end adapted to scan a fixed selecting means in two directions, said selecting means secured to said base and adapted to engage and hold said transfer means in any of a plurality of predetermined selected positions when operated, a drive plate journalled for oscillating movement on said heating for intermittently driving said transfer means, spring means secured on said bearing for urging said plate into predetermined frictional engagement with said transfer means, a plate cam having a continuous groove in one surface thereof secured for rotation on said base parallel thereto, a follower lever pivotally secured to said base and having follower means secured in one end thereof extending into said cam groove, the

gear means secured to said plate concentric with said axis and in engagement with said quadrant gear, said groove formed to move said follower lever, said gears, and said drive plate a predetermined number of sequential movements in opposite directions during said predetermined angle of rotation of said cam whereby the rotation V tioned in any of its said plurality of positions.

39 of said cam through said angle of rotation will oscillate said transfer means into engagement with said selecting means when operated in any of saidpredetermined posi tions and whereby said plate will overcome its said frictional engagement with said transfer means and complete said predetermined number of sequential movements.

"7. In a record changer, a base, aturntable journalled for rotation about an axis vertical to said base on a support fixed thereto, a plurality of records supported on said 7 base in vertical spaced relation in equi-distant radial rela tion with said axis, a selective record transfer means ineluding a record transport means journalled on said support for movement about said axis for selective registra- T said transport head is positioned,

tion with each of, said records, said transport means adapted and constructed to selectively transport each of said records from its said vertical position to a horizontal position on the turntable concentric therewith when operated in one direction and adapted to transport said record from said turntable to its original'position when reverse operated, rack means positioned in said transfer means'for reciprocation radial to said axis for operating said transport means when reciprocated, a cam means journalled for predetermined rotary movement on said support about said axis, follower means secured to said rack means adapted for engagement and reciprocating movement by said cam means when'the latter is rotated,

a driven gear positioned coaxial with respect to said axis and secured to said cam for rotating same, a main plate cam positioned for rotation on said base parallel thereto and having a groove in one face thereof, a follower lever means pivotally secured to said base having one end terminating in a second follower means, extending into said groove, the other end of said lever means terminating in a quadrant gear engagedwith said first mentioned gear,

said groove formed to drive said lever a predetermined reciprocation during a predetermined angle of rotation of said 'maincam whereby said driven gear will drive said cam means and reciprocate said rack means one predetermined to 'and fro stroke when said transmission means is in any one of its predetermined selected positions to operate saidltransport means and transfer a on a i and said driven means respectively, and lever means operatively connected to said cam means and pivotally mounted for movement a fixeddistance from said axis and adapted for predetermined oscillatory movement, said a lever means terminating at one end in' a quadrant gear in engagement with said driven gear whereby 'a' forward and reverse movement of said lever means will drive said driven gear, said crank arm, said connecting rod and re ciprocate said driven means to transport a selected record in rest position to, said play position and viceversa when v in any of its said plurality of positions. t 7

10. In an automatictselective'record changer, a base, a

turntable secured to said base for rotation about a fixed axis, a record magazine secured to said base for retain-' ing therein a plurality of disc records in uniformly spaced relationship, a selector secured to said base including a plurality of movable abutments retainedin said uniformly spaced relationship, each of said abutments corresponding to one of said recordsand supported for predetermined displacement, arecord transfer means secured to said base'and mounted for movement along said magazine for scanning said records in said magazine when selected record from its original position to the turntable for playing and vice versa. 4 V W 8. In a record changer a record transport head adapted for movement to a predetermined plurality of positions about a vertical axis, driven means in said head responsive to reciprocating movement for transporting a selected record from rest to play position when operated in one,

direction and adapted to return said record from play position to said rest position when operated in reverse direction,'cam means journallcd for rotation about said axis operatively related to said driven means, gear means secured to said cam means concentric with said axis for driving said cam means, a'ndlever means operatively connected to said cam means and pivota'lly mounted for movement a fixed distance from said axis and adapted for predetermined oscillatory movement, said leverrneans terminating at one end in a quadrant gear in engagement with said first mentioned gearmeans :whereby aforward and reverse movement of said lever meanswill drive said gear means, said cam means and said driven means to transport aselected ITBCOIdfil'LIfiSiQPOSiiiOH to said play position and 'vice versawhen said transport head is posi- 9.:Iira record changer are'c'ord transport head adapted for movementf'to' a predetermined plurality of positionsv about a vertical axis, driven means in said head responsive to reciprocating movement 'for'transporting'a' selectedfrec-i ord from rest to play position when operated in one direc V tion'an d adapted to, return saidrecord from play position I tto said rest position when operated in reverse directiorna moved, drive means for moving said transfer means, and" pawl means retained on the outer portion of said trans-,

fer means for arresting and holding said transfr means in register with a record in 'said magazine corresponding with a selected displaced abutment, said pawl means com= I prising a pair of pawls mounted for pivotal movement 'about mutually parallelaxes and spaced apart by ,atdistance substantially equal to the thickness of said abut ments, and spring means for biasin angular directions. a

11 In an automatic selective record changer, a base,-'a"

turntable secured to said base for rotation about a'fixed axis', a record magazine secured to said 'base for retaining therein a plurality of disc records in uniformly spaced relationship, a selector secured to said base including a plurality of movable abutmentstretained in said uniformly spaced relationship, each ofsaid abutments corresponding to one of said records and supported for predetermined displacement, a record transfer means secured to'said base and mounted for movement along saidmagazine for scanning said records in said magazine when moved, drive driven gear journalled for rotation about'said axis and' having a crank arm extending therefrom, connecting rod means pivotally secured at. both "ends to said 'crankarml 173 means for moving said transfer :means, a pair of pawls' pivotally mounted on parallel axes on said transfer means for engaging displaced ones of said abutments, spring means for-biasing said pawls in angularly opposite di: rections whereby said abutments may be engaged and held by said pair of pawls to'interrupt movement'of said transfer means irrespective of the direction of movement thereof with respect to said abutment, an abutment restore member mounted on said transfer. means for'radial re,- 7

ciprocation between said'pa'wls, and driving means for radially reciprocating said restore member for moving said I restore member into engagement with the held one of the said abutments forretuming it toits'non-displaced posi- V (Gther references on followin g page);

g said pawls in opposite

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