US2339981A

US2339981A - Automatic phonograph

Info

Publication number: US2339981A
Application number: US407788A
Authority: US
Inventors: Richard S Cranmer; Jr Charles A Pittman
Original assignee: Philco Radio and Television Corp
Current assignee: Philco Radio and Television Corp
Priority date: 1941-08-21
Filing date: 1941-08-21
Publication date: 1944-01-25
Anticipated expiration: 1961-01-25

Description

Jan. 25, 1944. ,.R. s. CRANME'R mL- AUTOMATIC VPHONOGRAPH Fil-ed Aug. 2l', 1941 4 SheetsSheei 1 Jan. 25, 1944.

R s. CRANMER ErAL AUTOMATIC PHONOGRAPH Filed Aug. l 21, `1941 4 Sheets-Sheet 2 Jan. 25, 1944.

R. s. CRANMER ETAL 2,339,981"

4AUTOB/ITIC PHONOGRAPH y' Filed Aug. 21, 1941 `4 shets-sheet s Jan. 25, 1944. R. s. CRANMER Erm.

AUTOMATIC PHONOGRAPH F i1ed Aug. 2l,A 1941 4 Sheets/-Shet 4 Z IZ IMI/ PatenteclvJan. 25,

,AUroMarrc rnqonoonn A Pelphia. :und Charles Richard s. crannier, A. Pittman, Jr., Philco Radio and Seilel'sville, Pa., assigner-s to Television Corporation, Philadelphia, Pa., a corporation of Delaware l g Application august 21, 194i, serial No. 407,788

13 Claims. v

flhis invention vrelates to automatic phonographs, and more particularly to a tone arm lndexin'g mechanism therefor. Disc recordings now in common use are obtainable in twelve and ten inch diameters, and automatic phonographs must, thereforebe capable ofl playing records of either diameter. This in turn requires that the mechanism for positioning the tone arm so that the stylus will engage the record at the clear' outer marginal edge thereof be selectively adjustable for records of either diameter. Such a mechanism preferably is a simple unitary structure having relatively few parts, yet it must be accurate and capable of simple adjustment by inexperienced operators. More'over; most automatic phonographs in'cludevsome form of an aiu-l tomatic record. changer capable of feeding to the phonograph turntable successive records of the same diameter, and such device must be adjustable for records of dieren't diameters.

The principal object of the present invention is to provide a tone arm indexing mechanism of improved character. l

A further object of the invention is to provide an accurate tone arm indexing mechanism of great simplicity. y

Another object of the invention is to provide a novel automatic record changer capable of easy adjustment to accommodate records of various diameters.

A still further object of the inventionis to adjustment means and the tone arm indexing mechanism, whereby both will be simultaneously adjusted by the operation of one control.

, provide an interlock between the record change- Other objects and features of the invention will appear from the following description of onestructure embodying the invention. In the drawings:

Fig. 1 is a side elevation of an automatic phonograph constructed in accordance with the present invention; y

Fig. 2 is a top plan view of the pronograph with the base plate and turntable shown in dot and dash outline and with the tone arm removed for purposes of illustration:` y

y Fig. 3 isa bottom plan view of the phonograph; Fig. 4 is a partial y tion ofthe mechanism taken along line @-4 oi Fis. 2; Y p

Fig. 5 is a perspective view of certain elements,

showing particularly the interconnection beprovided with teeth it on its sectional view through a por- Y (ci. ars-10) illustrating the functioning of a portion of the cycling mechanism;

Figs. 7, 8 and 9 are perspective views of important elements in the tone arm indexing mechanism:

Fig. l0 is a detailed perspective-view of an element of the record changer;

Fig. 11 is a perspective view of a part of the velectrical trip mechanism for actuating the clutch mechanism of the record changer Figs. l2 and 13are perspective views of details of the tone arm support and trip mechanism mounting; o. Y

Fig. 14 isa perspective viewof details of the electrical trip mechanism: and

Figs. l5 and'l are detail perspcctive'views of a' portion of the lelectroinagnetieally operated clutch of the record changer. I

With particular reference to the accompanying drawings, there is shown an automatic phonograph built on-a base plate i. Al depending U- shaped bracket 2 is secured to the base plate l and to this bracket there is secured a. fixed non rotatable vertical spindle 3. Loosely mounted on spindle 3 so as to freely rotate. thereon is a ranged toengage the inner surface of the turntable ilange to drive the same. The shaft E may be journaled at one end in a movable plate t. y

which is urged by springs i and 8 so as to malntain the rubber driving wheel in ilrm engagement with the turntable rim. Further description of the turntable and its-.driving means need not be givenhere as they may be of any well known form or substantially as described in copending application Serial No. 4122654, filed August 21, 1941, now Patent Number 2,316,858,

granted April 20, 1943.

The turntable d may have a central flnib 9 l (Figs. l5 and-18) secured ,theretopthe hub being 'lower face. It will be understood that whenthe phonograph is playing, a series of records. the turntable d will berotating continuously, and hence the rotating hub 9 will form a continuously available source of power for operating the record changtweenthe record changer and the tone arm Aindexing means;

Fig. 6 is a perspective view of certain elements.

ing mechanism as will now be described. y

Below the -hub 8 on spindle 3 there is a gear il having teeth i2 facing teeth I0 but normally disengaged therefrom (Figs. 6 and 15). Gear also has teeth I3 which engage the idler gear I4 to drive a, larger main cam gear I5, as illustrated. The structure of cam gear |5 is a principal feature of this invention and will be described more particularly hereinafter. In order to cause engagement' of the clutch gears Ill-I2, an electromagnet I5, energized by a trip mechanism at the completion of the playing of a record. is provided. Energization of the magnet I6 causes a horizontally pivoted lever |'1 to rock about its pivot I8. One end of lever |1 supports the gear on spindle 3 so that the rocking of lever |1 will engage the clutch gears III- I2 to .cause immediate rotation of the main cam gear I5. The other end of lever |1 extends toward the periphery of cam gear I and carries a small roller |9. The roller I9 normally rests in a notch or recess (Fig. 7). in a depending annular flange 2| on the underside of cam gear I5. Thus, when magnet I8 is deenergized,

the roller I9 locks the cam gear I5 against rotation; but when the magnet I6 is momentarily energized by the trip mechanism, lever I1 rocks to free the cam gear and to engage the clutch to rotate the cam gear. After its initial movement, the flange 2| serves to maintain the clutch in engagement through one complete revolution of the cam gear I5.

The single revolution of cam gear I5 is utilizedto control all of the elements of the record changing Ymechanism during the record changing cycle. One such function of the cam gear I5 is to control the movement of the tone arm which carries the reproducer. At one side of the turntable/there is secured to the base plate I a pivotally mounted tone arm 22 which may carry any type of reproducer at its inner end. The tone arm mount is best shown in Figs. 1, 4, 11, 12, and 13. A hollow bearing 23 fastened on base plate I forms the base for the tone arm. Through this bearing a hollow shaft 24 (Fig. 13) having a yoke 25 at its upper end is journaled. This provides for the horizontal movement of the tone arm. To yoke 25 a second yoke 28 is pivoted, the yoke 23 supporting the tone arm which is afxed to the tongue 21, to permit vertical movement of the tone arm. The tone arm may be secured to tongue 21 in any suitable manner, for example, by screws or rivets passing through the openings in the tongue shown in Fig. 13. A bushing 28 (Fig. 12) is secured to the lower end of shaft 24. This bushing carries a long multi-part arm 29 (Fig. 11)

which serves both as a part of the trip mechanism and as a part of the tone arm indexing mechanism. To mount the arm on the bushing 28 a lost motion connection is provided to insure against accidental damage to the parts -of the arm resulting, from accidental forced movement of the tone arm. This connection consists of a mounting plate 30 loosely pivoted on bushing 28. Beneath plate 30 there is a yoke member3| (Fig. 12) having a D-shaped head 32 and an extending finger 33. member 3| are secured together on the bushing 28 by collar 34 but are arranged for relative longitudinal movement. Normally spring 35, connected between plate 30 and linger 33, urges member 3| toward bushing 28A so that the flat face 38 of yoke head 32 will squarely seat on the fiat face 36aon the bushing 28. The engagement of the faces 38 and` 38a normally fixes the relative positions of plate 30 and member 3| with respect to the-bushing 28 andthe tone arm 22. However, should'the tone arm be forci- Plate 30 and bly moved while the arm 29 is held tlxed, rotation of bushing 28 will merely cause the extension of spring 35, and when the force is removed from the tone arm the spring 35 will reseat edge 36 on edge 36a in their normal relation.

Referring again to Fig. l1 the plate 38 carries an outwardly extending nger 31 which carries at its free -end a horizontally pivoted pawl 38. This pawl serves as one contact of an electrical-switch and it is therefore electrically insulated from the body of the arm 29 by a suitable insulating block. The pawl 38 normally rests in .a horizontal plane and to maintain it in this position the free end ofthe pawl, which carries the electrical contact button 39, is weighted at 4|! and is urged counterclockwise (as seen in Fig. 11) by a fine coiled spring 4| which surrounds the pivot for the pa'vl. To rotate the pawl 38 clockwise (as seen in Fig. 11) a-small friction roller 42 is secured to the pawl on its axis of rotation. The function of this roller and the pawl 28 can best be understood 3 during the playing of a record the arm 29 is also rotated in a parallel horizontal plane beneath the base plate I. The direction of movement is indicated by the arrow in Fig. 6. As the tone arm approaches the end of a record the pawl 38 will approach a pulsing plate 43 which is carried by a resilient arm attached to 1 the under side of the base plate Plate 43 has a. normal 'position from which it is momentarily deflected at regular intervals of time bythe pivoted. lever 44. Lever 44 engages the plate 43 with one endwhilethe other end of the lever carries a roller 45 adapted to ride on a shoulder 48 of the continuously rotating turntable hub 9. The shoulder 48 has a raised cam portion 41 at one point so that once each revolution of the turntable lever 44 will be rocked to ilex the plate 43 from its normal position to a raised position. The relative positions of plate 43 and pawl 38 are such that the pawl will pass underneath the plate without contacting the same, but roller 42 is of such diameter that its upper portion frictionally engages the under surface of plate 43 when the same is inits lower position. Therefore as arm 29 is moved horizontallyby the movement of the tone arm 22, roller 42 will be caused to rotate clockwise (as seenin Fig. 6) thereby elevating the electrical 'contact button 40 toward plate 43. The several elements just described comprise the electrical trip mechanism for energizing the electromagnet I8 at the end of the playing of a record. Suitable wires 48.l 49 and 50 connect a source of power (not shown), the magnet I6, plate 43 and pawl 38 in series so that whenever rthe pawl 38 is elevated sufficiently for contact 40 to engage plate 43 the magnet I5 will be energized to close the clutch I0, I2 as described above. However, the several elements of the trip mechanism, and particularly pawl 28 and roller 42, are so proportioned that with the tone arm moving inwardly very slowly during the playing of a record the time interval between the pulses of plate 43 is insuflicientto enable contact between button 40 and plate 43. Further, cam 41 and lever 44 are so designed that when plate 43 is flexed on each revolution of the turntable it becomes momentarily disengaged spiral terminating groove at the inner edge of the` .vention but is described and claimed record the .pawl 38 is thenl'move'd inwardly so rapidly that during the time interval between the pulses of plate 43 the pawl will be rotated about its pivot causing contact button I to engage plate 43 to close the circuit energizing magnet I6, thus initiating the record changing cycle. The speciiic pulsing mechanism and electrical switch structure does not form a part of the present in in U. S. Patent No. 2,287,726, issued to R. S. Cranmer on June 23,- 1942.

While a-speciilc form of trip mechanism for energizing solenoid I 5 has been illustrated and described, it will be understood that other forms may be used.` For example, the trip mechanism shown in' a copending application of R. S. Cranmer, Serial No. 393,636, iiled May 15, 1941, now

The extension 56 normally seats the head .of an adjustable screw 5'I on yoke 26 so that theelevating or lowering of rod 55 will in turn raise or lower the tone arm head by causing clockwise or counterclockwise rotation of the tone arm as viewed in Fig. 1.

The tone armk having been raised of! the record, zone B of cam gear I5 will now-pass under stud 54. This zone is bounded at the outer and inner edges by upstanding flanges which form a surface of narrowing width suchv that at the end of zone'B the surface is merely Patent Number-2,287,727, issued June 23, 1942,

may be employed. Y

Thus far there has been described themechanism to initiate and control the rotation of the 1 main cam gear I5 through one revolution when the reproducer reaches the terminating groove of a record. In order toplace a new record on the turntable it is necessary that the tone arm be .elevated clear of the record, then swung' laterally to a position to one side of the turntable, then swung inwardly to a position over the edge of the newrecording, then lowered onto the record, and then permitted to move freely over the record during the playing thereof. These ve movements are all controlled by the various surfaces or zones on the main cam gear I5 labeled A to E respectively in Fig. 5. Referring again to Fig.

II the plate 39 will be seen to have a portion 5I bent so'as to carry a second finger 52 below plate Sli in a plane generally parallel thereto.

Finger 52 is resiliently attached to 'portion'. 5I

through a flexible strip 52a so that it can be exed about a transverse axis. An upturned iinger 53 serves to maintain plate 3@ and nger 52 in substantial alignment. At itsfree extremity finger 52 carries a downwardly extending studl a narrow annular channel 58 of large radius at the outer edge of the cam gear. When the stud 55 is in channel 58, linger 52 vand the tone arm22 will have been rotated to a position at one side ofthe record and' turntable so as not to interfere with the feeding of another record to the turntable. Since thezone B of the cam gear is a plane elevated surface, the tone arxn is maintained in its elevated position.

' Stud Ednow engages the `zone C of cam wheelv channel Si) in switch 59 forms a continuation l of channel 58. This is shown in Fig. 5. The

switch member 59 is movable about its pivot between two positions and is normally maintained 54 which always overlies the upper face of the main cam gear I5 (see Figs. 1, 2, and 4) and contacts the same (Fig. 4). In Fig. 2 the cam gear I5 is shown in its normal stationary position with stud 55 in zone E (see Fig. 5). Zone E is a fiat portion of the cam face suchthat movement of stud 55' throughout zone E will not beat all restrained. Asthe tone arm moves inwardly over a record, the stud 54 will move on a generally radial line toward the center of the cam gear I5. When the tone arm causes the energization of the magnet I 3, the cam wheel I5 begins to rotate and zone A of' the cam passes below stud 55. Zone A comprises an inclined plane the entire surface of which is so developed that as it passes beneath stud 5 6 a lifting force is always exerted on stud 54 on a line passing through the axis of stud 54 and the tone arm pivot 23. This is desirable as it prevents lateral movement of stud 55 across the zone A as the cam I5 rotates, such motion being very undesirable. Zlone A of the c am gear I5 thus elevates stud 5B and causes the nger 52 to iiex to elevate the tone arm as will now be described. Y

Referring to Figs.- 4, 11 and 13, the hollow shaft 25 supports within. itself a small rod 55 which extends below shaft 24'and has-at its upperend an oii'set extension 56 as shown. When arm 29 is assembled on shaft 24, the nnger 52 will underlie the lower end of rod 55- (see Fig. 4) and the exing ofnger 52 about its base by the cam gear I5 will elevate rod 55.

in the outer of these positions by a .leaf spring 5I winch urges a stud t3 on switch 59 ainst a stop 6d on cam gear l5. Switch member 59 includes an extending portion 52 arranged to be acted upon by suitable linkages to be described later which are effective to move switch 59 to its inner position when desired. The channel 59 is curved so that when the switch 5 9 yis in its outer position the stud 5d and arm 22 will be moved to position the tone arm over theedge of a record of vlarge diameter when the cam gear I5 has rotated s o that stud 54 is adjacent vthe trailing edge of channel section 60.

As noted, switch 5 9 is pivotally mounted for.

movement to an inner position. This position is determined by the abutment of the stud 63 against a stop on cam gear I5 (Figs. 8 and 9) which are located so that when switch section 59 is in its inner position it will cause the zone D of the cam gear which is tone armto be rotated to a position above the edge of a vsmaller diameter record. Switch member-59 is thus adjustable to index the tone arm for the playing of records of diilerent diameter and the only remaining function for cam gear I5 is that of lowering the tone arm o nto a record. This function is performed by seen to comprise two annular inclined channels Aor tracks 66, 61 the leading edges of which connect with the trailing edge of switch member 59 in its outer and inner positions` respectively.v Channels 6E and 51 are circular and therefore there will be no lateral motion of theftone arm, Vbut these channels lower stud 54 -to the elevation of the zone E thus loweringthe linger 52, rod 55 and tone arm 22 until the latter engages the record. Cam gear I5 having completed one revolution will now be in the position illustrated in Figs; f

1, 4, and 6 andwill remain stationary until the "magnet I 6 is again energized at the completion of the playing of a record asdescribed.

Mechanism is also provided to supply records to the turntable one at a time from a record wherein the cam surfaces through a hence the tone magazine containing a. stack of records. In Fig. 1, one record is shown on the turntable while another record 68 is shown supported above the turntable in a position t`o be dropped'thereon. Records are supported at their center by the spindle 3 which has a flat shoulder 69 formed to engage the record at its center opening. The outer edge of the record is supported at two spaced points byone of two record shelves 18. 1|, (Figs. 1, 2, 5, and 10). Each shelf at its lateral extremities carries studs` 12 shaped to engage the underside and the edge of a recordA as in Fig. 1. The

shelves

18, 1| are pivotally supported at 13 on the upstanding arm 14 of a bell crank comprising arms 14 and 15. The bell crank is pivotally'supported from the base plate will be indexed for records of small diameter. When the record shelf 1| is rotated to its inoperative position the tension on cord 84 will be released and spring 82 will rotate member 80 to its extreme clockwise position in which 1inger 8| will not contact switch member 59 during the rotation of cam gear l5, so that the tone arm will be indexed for records of large diameter. If desired, some other means for controlling the position of member 89 may be provided without modifying the main cam gear I6.

To prevent the accidental discharge of records from the record shelf as the result of vibration of the record changer, a pivotal arm 86 I at pivot 16. If desired some adjustment as at 11 may be used to vary the,angular relation of the Itone arm is off-to one side of the record and hence a record freed from shoulder 69 may drop onto the turntable. Except for the use of the

dual shelves

18 and 1|, thel speciilc type ofA record feeding mechanism above described is well known and no further description thereofis believed necessary.

The shelves 19 and 1| are of different lengths such that the shelf 1| when in operative position extends toward the spindle 3 more than does shelf 19. Both shelves are rotatable about their pivot from operative position to the position' shown in dotted lines in Fig. 1.

Shelf 1| thus supports small diameter records while shelf 10, when shelf 1| is rotated to inoperative position, will support large diameter records.

To adjusting the record changer to play twelve or ten inch records it is necessary to move the desired

record shelf

18, 1| into operative position and in accordance with this invention the adjustment of the record shelves is used to control the position of the switch member 58 to properly index the tone arm for the propel` record diameter. This interlock is best'illustrated in Figs. 2 and 5. A pivoted control member 88 is-mounted beneath the base plate-I adjacent the edge of the main cam gear I6 and carries a, finger 8|- extending toward said gear (Fig. 5). This member 88 is adjustable between two positions determined by suitable stops not shown. The spring 89a normally maintains member 88 in its extreme clockwise position as viewed in Fig. 5. A second linger 82 on member 89 is attached to one end of a tension spring 83, the other end of which is secured to a cord 84. .The cord 84 is guidedby pulleys 85 to the base of arm 14 and then it passes over the pivot of record shelf 1| and terminates at the base of shelf 1| to which 'it `is secured (see Fig. 10). When shelf 1| is placed in operative position, as shown in Fig. 5, cord 84 will rotate memberv 80 to its counterclockwise position where finger 8| will terminate adjacent the periphery or main cam wheel I5; As the cam wheel I6 rotates', switch membery 68 will be moved to its inner position by engagement with the tlnger 8|. Thus when the record shelf 1| is in operative position the .tone-arm (see Figs. 1 and 2). Ihaving a roller 81 on its free end maybe provided. Roller 81 normally will rest on the upper surface oi the top record in the changer. To permit easy removal of records from the turntable,

record shelves

18, 1| and arm 86 may be swung on their pivots to a rearwardly extending position behind arm 14.

It is well known that some means should be 'l provided for moving the tone arm toward the first groove of a record after the stylus has been placed on the edge thereof. The arrangement shownin Figs. 2, 3, and 11 performs this function. A projection 92 on plate 89 isY connected to a projection 88 on member 88 by. a link 84 and spring 85. Theseelements are proportioned to be under slighttension when the tone arm initiallycontacts the outer `edge of the record, so that slight rotation will be given to the tone arm until the first groove of the record is engaged by the stylus. Itis a feature or' this structure that when member 88 is rotated to index the tone arm for records of either diameter the

projections

92, 93 will remain a fixed distance apart. This 'assures a fixed force on spring 95 regardless of the size of the record being played, so that the tone arm is always properly directed into the rst record groove.

In the foregoing description the mechanism necessary for the automatic operation of the recentNo. 2,287,726, and is herein. shown in `Figs.v

2, 3 and 14. A cam element 88 forms part of such mechanism and has an end portion 89 at adiiierent level than the main portion (Fig. 14). A pivoted lever extends between cam element 88 and arm 44 in such relation that when portion 89 engages and depresses one end of lever 90 the other end will elevate arm 44 to lift the pulsing plate 48 out 'of engagement with the roller 42 of the trip mechanism, thus rendering the latter inoperative and permitting manual operation oi the record changer.

In. addition. a switch el eonnected in shunt` with the pulsing plate 48 and tripping pawl 88 may be provided4 to. energize magnet I6 and initiate a record changing cycle at any time.

From the above description of one form of apparatus constructed according to the invention it will be clear that an accurate, inexpensive. simple and dependable phonograph record changing mechanism has been provided.V Numerous details of the structure may, of course, be modied without departing from-the invention as dened in the appended claims.

We claim: 1. In an automaticv phonograph, a turntable,

means for driving said turntable, a tone arm mounted for movement with respect to said turntable to reproduce sound records placed thereon, means for supporting a stack of records above said turntable and operable to feed the records successively onto the turntable, a normally st ationary rotatable cam plate having cam surfaces records at their outer edges and manuallyniovable selectively to an operative position to support" different sized records, a mechanism Afor moving the tone arm off one record and onto a succeeding record, adjustable means on said thereon 'and having a notch therein, means opfor actuating said lever to withdraw. said locking means from said notch and to engage said clutch,

to thereby effect rotation of said cam plate.

2. In an automatic phonograph, a turntable, a tone arm mounted for movement with respect to said turntable to reproduce sound records placed thereon, means-for supporting a stack of records above said turntable and operable to 4i'eed the records successively onto the turntable, said means including a pair of shelf members on a common horizontal pivot arranged to support the records at their outer edges and manually movable selectively to an operative position to` support different/sized records, means for moving the tone arm oi one record and onto a succeeding record, said last-named means being adjustable to adapt` the same for movement of the'tone arm according to the diiferent sized records, and means operable in response to the selective movement of one of said shelf members toits operative position foi` adjusting said tone arm-moving ymeans in correspondence to the selected shelf` member.

= 3. In an automatic phonograph, a turntable, a tone arm mounted for movement with respect to said yturntable to reproduce sound records placed thereon, means for supporting a stack of records above saidturntable and operable to feed the records successively onto the turntable, said means including a pair of shelf members on a common horizontal pivot arranged to support the f records at their outer edges and manually movable selectively to an operative position to support different sized records, a mechanism for moving -the tone arm ofi' one record and onto'a succeeding record, adjustable means on said mechanism to adapt the same for movement of the tone arm according to the diierent sized records, means biasing said adjustable means to one position of adjustment, and means operable in response to the selective movement of one of said shelf members to its operative position for actuating said adjustable means to a different position of adjustment, thereby to adjust said mechanism in correspondence to the selected shelf member.

4. In an automatic phonograph, a turntable, atone arm 'mounted for movement with respect to said turntable to reproduce sound records placed thereon, means for supporting a stack of records above said turntable and operable to feed the records successively onto the turntable, said means including a pair of shelf members on a mechanism to adapt the same for movement of the tone arm according to the different sized records, means biasing said adjustable means to one position of adjustment, and means interconnecting one of said shelf members and said adjustable means and adapted toactuate the latter to a. different position of adjustment whenever said one shelf member is moved to its operative position,

whereby said mechanism is adjusted in correspondence to the shelf member-employed in any instance.

5. In an automatic phonograph, a turntable, a tone arm mounted for movement with respect lto said turntable to reproduce sound records placed thereon, means for supporting a stack of records above said turntable. and operable to feed the records successively ontothe turntable, said means including a plurality of support members on a common horizontal pivot arranged to support the records lat their outer edges and manually movable selectively to an operative position to support different sized records, actuating means for said last-named means to feed the records, actuating means for said tone arm to move the same during the changing of records, a common cam for operating both of said actuating means, adjustable means on said cam to adapt the same vfor movement of the tone arm according to the diierent sized records, and means operable in response to the selective `movement oi? one of said record-support members to its operative position for actuating said adjustable means in correspondence to the selected member.

6. In an automatic phonograph, a turntable, a tone arm mounted for movement with respect to said turntable to reproduce sound records placed thereon, means for supporting a stack of records above said turntable and operable to feed records successively onto the turntable, said means including a plurality of support members on a common horizontal pivot selectively movable-to an operative position to support different sized records, means including a cam member for moving said tone arim off one record andI onto a succeeding record, said cam member having a plurality of tracks for governing the movement of the tone arm according to the size of the records being used, a track-switch elementon said cam member movable to different positions to select one of said tracks, and means operable in response to manual adjustment of said record-supporting means for actuating -said track-switch element to select the proper cam track for the record size corresponding to vsaid manual adjustment.

'7. In an automatic phonograph, a turntable, a tone arm mounted for movement with respect to said turntable to reproduce sound records placed thereon, means for supporting a stack of records above said turntable and operable to feed records successively onto the turntable, said means including a plurality of support members on a common horizontal pivot selectively movable to an operative position to support different sized records, means including a cam member for moving. said tone arm ofi one record and onto a succeedingrecord, said cam member having a plurality of tracks fors governing the movement of the tone arm according to the size of the reccommon horizontal pivot arranged to support the A ords being used, atrack-switch element on said record-supporting means for records of one size for actuating said track-switch element to another of its positions, thereby to select the proper cam track for the said records.`

8. In an automatic phonograph, a turntable, a tone. arm mounted for movement with respect to said turntable to reproduce sound records placed thereon, means for supporting a stack of records above said turntable and operable to. feed records successively onto the turntable, said means including a plurality of support members on a common horizontal pivot selectively movable to an operative ,position to support different sized records, means including a cam member for moving said tone arm ofi' one record and onto a succeeding record, said cam member having a plurality of tracks for governing the movement of the tone arm according toi thesize oi' the records being used, a track-switch element on said cam member movable. to diierent positions to select one of said tracks, means biasing said track-switch element to one of its positions, an actuator for said track-switch element arranged cooperatively with said cam member and movable between effective and ineffective positions, said actuator when in its effective position serving to move said track-switch element to another of its positions, and means responsive to selective movement of one of said support members to its operative position for moving said actuator to its effective position, so as to select the proper cam track for the record size corresponding to the selected support member.

said means including a pair of shelf members on a common horizontal pivot arranged to support the records at their outer edges and manually movable selectively to operative position to support different sized records,v means including a cam member for moving said tone arm oi one ,record and onto a succeeding record, said cam member having inner and outer tracks for governing the movement of the tone arm according to the size of the records being used, a trackswitch element on said'cam member movable to inner and cuter positions to select one of said tracks, means biasing said track-switch element to its outer position, and means responsive to the selection of the shelf member for smaller sized records for moving said track-switch element to -its inner position, thereby to select the inner 9. In an automatic phonograph,A a turntable, a o

tone arm mounted for movement with respect to saidl turntable to reproduce sound records placed thereon, means for supporting a stack of records above said turntable and operable to feed records successively onto the turntable, said means including a plurality of support members on a common horizontal pivot selectively movable to an operative position to. support different sized records, means including a cam member for moving said tone arm on.' one recl ord and onto a succeeding record, said cam member having inner and outer tracks for governing `the movement of the tone arm according to the size of the records being used, Va trackswitch element on said cam member movable to inner and outer positions-tol select one of said tracks, means biasing said track-switch element to its outer position, an actuator for said trackswitch element arranged cooperativelyl with said cam member and movable between effective and ineffective positions. said actuator when in its effective position serving to move said track-switch elementto its inner position, means biasing saidv actuator to its ineifective position, and means responsive to the operative positioning of the support member for smaller sized records for moving said actuator to its effective position. thereby to select the inner cani track for the said records.

10. In an automatic phonograph, a tone arm mounted for movement with respect A to said turntable to reproduce sound records placed thereon, means for supporting a stack of records above said turntable and operable t0 a turntable. 7

cam track for the said records.

ll. In an automatic phonograph, a turntable, a tone arm mounted for movement with respect to said turntable to reproduce, sound records. placed thereon, means for supporting a stack of records above said turntable and operable to feed the records successively onto the turntable, said means including a pair of shelf members on a common horizontal pivot arranged to support the records at their outer edges and manually movable selectively. to operative position to support diierent sized records, means including a cam member for moving said tone arm oil one record and onto a succeeding record, said cam member having inner and outer tracks for governing the movement of the tone arm according to the size of the records being used, a trackswitch element on said cam member movable to inner and outer positions to select one of said tracks, means biasing said track-switch element to its outer position, an actuator for said trackswitch element arranged cooperatively with said cam member and movable between effective and ineffective positions, said actuator when in its effective position serving to move said track-switch element to its inner position, means biasing said actuator to its ineffective position, and means responsive to the selection of the shelf member for smaller sized records for moving said actuator to its effective position, thereby to select the inner cam track for the said records.

l2. In an automatic phonograph, a turntable, a tone arm mounted for movement with respect to said turntable .to reproduce sound records placed thereon, means for supporting a 'stack of records above said turntable and operable to feed the records successively onto the turntable, said means including a plurality of support members on a common horizontal pivot arranged to suport" the records at their outer edges and manually movable selectively'to an operative position to support different sized records, actuating means for said last-named means to feed the records.

actuating means for said tone arm to move the same during the changing of records, a common cam for operating both of said 'actuating means, said'cam having a plurality of tracks for governing the movement of the tone arm accord-` ing to the size of the records being used, a'trackswitch element on said cam movable to diierent positions to select one of said tracks, and means feed the records successively onto the turntable operable in response to selective movement of said support members for actuating said trackswitch element to select the proper cam track for the record size corresponding to the selected -support member.

said meansincludlns a plurality o! support members on a common horizontal pivot arranged to 'support the records attheir outer 189s andv manually movable selectively to an operative position to support dlerent slled records. a can:v

plate havingcam surfaces on itsy opposite faces.

means operable by the cam surface on one face l of said plate for actuatingA said record-supporting means to feed records, means operable hy the cam surface on the other face o! said plate for kxxxot'i'n'gailiti during the changing I orrecord's. said other lace' having a plurality or tracks'for eoverninzthemovemet o! the tone 'arm-aocordlngtothesineottherecordshelng. t uned.atrack-switchelementensaidcompiutei movable todlilereut positions` to select `one of said v tracks. aud means operable ln response tctse vlectlve movement of sald support members for actuating` said' track-switch element to select the l0 proper cam track for the record size correspondlng to the selected support member.

. mcrnmpgs.

A. Jr.