US1580561A - Phonograph, talking machine, and the like - Google Patents

Description

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F. B. MSTCHELL PHONOGRAPH, TALKING MACHINE, AND THE LIKE Filed March 25, 1918 I5 Sheets-Sheet '1 April 13, 1926. 1,580,561

F. B. MITCHELL -PHONOGRAPH, TALKING MACHINE, AND THE LIKE Filed March 25. 1918 5 Sheets-Sheet 2 mus 0 M WITNEJS April 13 1926'. 1,580,561

' F. B. MITCHELL PHONOGRAPH, ,TALKING mourns, m was LIKE Filed March 25. 1918 5 Sheets-Sheet 5 Patented Apr. 13, 1926.

UNITED STATES PATENT oFHcE .)v

FRANK B. MITCHELL, OF HOVE, ENGLAND, ASSIGNOR TO THE VICTOR TALKING MACHINE COMPANY, OF CAMDEN, NEW JERSEY.

PHONOGRAPH, TALKING MACHINE, AND THE LIKE.

Application filed March 25, 1918. Serial No. 224,682.

To all whom it may concern:

Be it known that I, FRANK BOWLEY MITCHELL, a subject of the King of England, residing in Hove, Sussex, in England, have invented certain new and useful Improvements in Phonographs, Talking Machines, and the-like, of which the following is a specification.

The invention comprises an automatic repeating and stopping mechanism set into operation by means of. a projection or shoulder on a record disc, and by the arrangement or adjustment of which a record may be played or-reproduced once and then automatically stopped; played twice and then automatically stopped, or the mechanism ma be adjusted to repeat continuously, as esired.

The invention further consists in providing a construction which is adapted to be attached to any well-known type of talking machine, and which by its cooperation with the record will automatically cause the repetition of a reproduction of sound from a r record,'or stop the rotation of the turntable on the completion ofsuch reproduction.

My invention further comprises certain improvements in providing a talking machine with a friction member actuated by a shoulder (projection or depression) on the record surface, to lift the point of the stylus above the surface of the record at the termination of the reproduction of sound therefrom, and to maint-ain'it in such elevated position during thefmovement of the reproducer from a position at. the end of the rec- 0rd groove to a positionat the beginning of the said groove.

The friction member may sometimes be mounted to move on flexible media such as a spring, like the pendulum of a clock instead'of being pivoted.

A part governing or actuating the movement of the friction member is arranged to be moved by coming into contactwith v a shoulder on the moving record disc. The shoulder may be a slight projection up from the surface of the record. It may be a thin piece of metal struck thereon, or it may be the edge of a recess in the record.

I will now describe the invention with reference to the accompanying drawings in which Figs. 1 and 8 are views in elevation of one form'of my invention;

Fig, 2 is a plan View of the same;

Figs. 3 and 4 are elevational views of another form of the device;

Fig. 5 illustrates in perspective a further modification of the invention;

Fig. 6 is a perspective view of an automatic stop for varying the outward move ment of the tone arm and reproducer carried thereby;

Fig. 7 is another form of an automatic stop for positioning the tone arm in its outward movement;

Flgs. 7 a and 7 are detail views in perspective of two of the parts of the adjust-able stop shown in Fig. 7.

Figs. 7 and 7 'are s de elevational and plan views, respectively, of athird part of the stop mechanism shown in Fig. 7.

Figs. 9 and 12' are views partly in section of the mechanism shown on a larger scale in Fig. 6.

Fig, 10 is a plan view of the talking machine provided with my repeating and stopping mechanism;

Figs. 11, 13 and 14 show in side eleva tion a further embodiment of 'my -inven tion, the construction being that shown attached to a talking machine in Fig. 10;

Figs. 15 and 16 show alternate methodsof providing a disc record with shoulders to actuate the repeating and stopping mechanlsm.

Fig. 17 is a showing of a further modification of my invention similar in some respects to that'shown in Fig. 5. 1

The'Figures 1, 2, and'8, show an apparatus intended for use on machines Without a movable stop member to limit the lateral movement of the tone arm. The friction (see dotted lines in Fig. 2). The action is as follows: 1 I

When the arm C is down, as shown by the dotted lines, resting on the record and. holding the friction member C in the inac 2) attached to the block E in which the member'D' is adapted to slide tive position while the record is being played (as shown in Fig, 11 of another type) the spring F will also be down and impinge against the right hand side of the small spring E mounted on the guide E. This will prevent the spring G, having its opposite ends respectively attached to the members B and D, from pulling the member D to the forward position shown in Fig. 8 that is to say, towards the stylus.

When the record is finished, the pawl G which is loosely pivoted at C to the end of the arm 0 and which with said arm C constitutes a feeleror actuating member, engages the shoulder Y on the record VJ (see Fig. 10) and swings the member C on its pivot C throwing the arm C up, as shown in Fig. 1, thus bringing the friction member G down on the record, with the result that the friction member is drawn in the direction in which the record is rotating, and towardthe stylus and under the sound box, raising and holding the tone arm just enough to cause the stylus to be clear of the record, as shown in Fig. 14-, wherein is illustrated another embodiment of my invention.

The rising of the plate 0 lifts the spring F clear of the top of spring E as shown in Fig. 1. This small spring E now springs forward under spring F so that if spring is lowered it will go on top of spring E and the tendency of the member G will not be stopped by the spring E The spring G would now pull the parts D and G to the left, as shown in Fig. 8, but while the friction member C is engaging the record and causing a lateral movement of the tone arm toward the periphery of the record, the stop pin H will prevent the spring G from so acting until the friction member gets over the edge of the disc and arm C again falls free of the stop H N ow the spring G will draw the member D and its parts to the left toward the stylus, as shown in Fig. 8, but with the governing arm C down.

Immediately upon the friction member C getting over the edge of the disc. and the pawl C falling on the surface, the stylus will enter the outermost groove of the still moving record and play again. The dotted circular line in Fig. 2 represents the edge of the record.

hen this second reproduction of sound from the record is completed, the pawl C is again engaged by the shoulder Y, the friction member again lifts the stylus, and the tone arm is again lightly carried outwardly towards the edge of the record but this time not farenough for the friction member to get over the edge of the disc owing to the fact that the friction member is now nearer to the stylus and further from the axis of the tone arm A (see Fig. 8). The disc is therefore brought to a standstill by the fr ction of the friction member, 0*. Fig. 2 shows a screw E to fix the slide in either of its positions when desired for constant repetition or breaking.

To reset the apparatus for repetition it is only necessary to pull out the sliding member 1) until the spring F catches behind the spring E This holds it back until the working of the machine again releases it as before describec The block C (see Fig. 1) is constructed. with a slot to give a swing grip on the adjustment screw of the friction member C so that wherever it is adjusted for height (to suit a different length needle) it will remain at that adjustment without the use of a locknut to fix it. The friction member in some forms has a hard metal braking surface, as a soft surface sometimes hinders the lateral movement of the ton-e arm.

Referring to Fig. 5 a. block B is screw threaded to revolve freely on the screw threaded vertical pin of the clamp B, (here shown in position for mounting on the tone arm) and carries a tubular bearing B in which rotates the axle C carrying a friction member C on one end and a crank C on the other end.

The bearing may be movable around the pin of clamp 13 through a small arc to perm t the friction member to be adjusted toward or away from the stylus in order to cause the device tooperate as a stop oras a repeater.

The nuts B and B are to be locked together in any suitable position of adjustment. The nut 13* carries a pivot pin 13 for the arm C to work on.

vVhen the arm C is thrown up by the pawl catching against the shoulder on the recorc disc (see Y Fig. 4) it will push the crank C down, rotating the friction member C until it is stopped with the part marked X, in contact with the record, and acting as a brake shoe after having raised the tone arm and stylus. The helical formation of the friction member G shown in Fig. 5 is so that the moving disc may help to pull it round into position with the part X in contact with the disc. Any suitable means may he provided for limiting the horizontal arc movement of C and to hold it in position either towards or away from the stylus for the purpose stated. The apparatus shcwn in Fig. 5 may be used to automatically lift the. stylus and tone arm without the rotary member C see Fig. 17 by extending the arm B to form a solidly mounted fric tion member therewith, such as C shown in Fig. 1, for example, to operate on the record as follows: In this case the pin C wou d also be a fixed part of block B (see Fig. 17). The block is screw threaded and freely movable around the pin 13 as before, and then when the arm C is thrown up (if its end at O butts againstthe near side of pin C it will throw the block B and the friction member around the pin through a small arc towards the stylus, and at the same time the block will descend on the screw towards the surface of the record until stopped by the nut 13*.

If the screw threads onthe pin B are made with a strongly inclined helix this lowering of the friction member may be arranged to raise the stylus and tone arm. The friction grip of the moving record will also help.

A spring may be provided to return the friction member to the inactive position when free of the record.

Figs. 3 and 4 show an apparatus in which the two positions are obtained by a link motion instead of by a sliding motion. The action is as follows The spring 13, fixed to the arm B of the clamping member B, holds the arm C in position in the rear of the stylus, as shown in Fig. 3. The spring B tends to. pull it into the position shown in Fig. 4. 25'

During action, when the pawl C catches against the shoulder Y the arm is throwir up and the friction member C lifts the tone arm, as shown in Fig. 14:. This causes the small extension C to push spring 13 up out of abutting action against the pivoted portion of the arm C. The member 0 is then pulled to the right hand a very small. amount by spring B but enough to prevent the spring B again falling to the catching position. The small extension C will prevent right by catching the block B on the under side of spring 13. Thus while the tone arm is being traversed outwards, the friction member will still be in position farthest from the stylus and will carry the arm far enough for it to get over the edge of the record and the stylus to again get in action in the grooves at the outer edge of the record. The end C will now fall on to the surface of the record releasing the extension C from the small block B The spring-:B may now pull the'linlr B s and the friction member to the position nearest the stylus as shown in Fig. 4.

When the record has been played the second time the lifing of the stylus again takes place but as the frictionmember is now near the stylus and more remote from the axis of the tone arm, the tone arm will not have so much outward traverse and the machine will be stopped by its friction as before stated.

In order that the governing arm C may be more forcibly thrown to get the friction member into action on the record disc, the end of the governing arm is provided with a. pawl C pivoted at its end (1*, (see Fig. 13.) The action may be seen from Fig. 4; where the shoulder Y is represented moving in the further movement to the direction of thearrown This shoulder on C down on the disc and raise the stylus as 7 described.

My device-is adopted tobe mounted on a machine in which the tone arm A is mounted on pivots A (see Fig. 12) which are able to move in a circular guideway inside the bearing A*. When the tone arm is lifted it also moves on the said pivots.

The friction member is mounted to swing freely in a bearing mounted crosswise on the top of an adjustably screw threaded pin B, as shown in Fig. 13, for which purpose the top of the friction member is provided with a cylindrical journal C fitting into a horizontal bearing. 22 provided on, the top of the pin B.

B is a block clamped between the ends of a band B, adapted to be clamped by the nuts shown around the neck of the reproducer so that the friction member shall be mounted, as shown in Fig. 14. It has stops not shown to prevent it swinging too far in either direction and it is so balanced that the pawl end hangs lowest as shown in Fig.

11 at A Figure 13 is a full sized view ofbearing A carries the stop member, shown in Fig. 6.

The fixed part .1 of the stop apparatus is rigidly attached thereto. A stout pin A is fixed in the base part A of the arm A. On the fixed part P, a plate-R is pivoted by the pivot P so that it may have'a very free swinging movement and is so balanced that its normal position is that which is shown. in Fig. 9, wherein its lower end normally lies in the path of the pin A A similar swinging plate S is pivoted to the fixed part P on a pivot P and is so balanced that it normally hangs in the position shown in Fig. 6 wherein its lower end holds the plate R above its normal position and out of the path of the pin A The plate S is mounted in such a position with respect to the fixed hearing A that it will limit the lateral movement of the pin A and the tone arm-(see Fig. 12) in such a manner that the stylus shall remain on the surface of the record while the friction member C moves over-and off the edge of the record. For this purpose the friction member C is offset laterally toward the edge of the record, as shown in Fig. 10. When,

however, the plate S has been swung on its wardly to its normal position (as shown in Fig. 9) until the plate S has been moved from in front of it by the pin A The action is as follows The machine is started with the swing arm or friction member C in the position shown in Fig. 11. VI hen the record is finished the stop Y will catch the pawl C and throw the arm up raising the needle, as shown in Fig. 14-.

Owing to the relative positions of the centre of the record, the axis of the tone arm movement and the position of the friction member the arm is now carried outwards by the friction member until stopped by the member S (if it has been for repetition, as shown in F 6). Then, as stated the friction member C will fall over the edge of the record and immediately gravity will cause the arm C to swing into the inactive position. The pawl C still being over the record will now rest thereon, as shown in Fig. 11 and the stylus entering the grooves of the still moving record. the record will again be played.

the stopping of the tone arm takes place the pin A will drive the member S back from the position shown in Fig. (5 to the stop pin P allowing the member it to fall in front of it (see Fig. 12) so that when the pin A is automatically removed the plate R will complete its fall and assume the position shown in Fig. 9. The next time the stop acts pin A will be stopped by the member R which is operative to limit the outward movement of the tone arm and so prevents the friction member from getting over the edge of the record. Then the machine will be brought to a s .andstill by the friction of the friction member upon the surface of the rotating record.

In this construction the pin A will be withdrawn (for the free handling of the tone arm when setting the machine) by simply raising the tone arm, owing to the relation of the pin A to the pivot pins A. of the arm A. If it should be lowered with the pin A butting on the face of the plate S; that plate is mounted so loosely longitudinally of its pivot that it will yield or give away in front of it sliding longitudinally on its pivot to a position against the plate P until the working of the machine and the consequent lateral movement of the tone arm has removed the pin A. as shown in Figs. 9 and 12, when the plate S (see Fig. 6) will again be moved towards the arm base A", if pressed by the plate It. Otherwise the plate will normally stay back on plate I.

R is a screw by turning which the plate B may be fixed so as to give constant repetition when desired (see Fig. 6). By this form of stop arrangement the machine will repeat once only when the plate R has been lifted and the plate S has fallen in front of it (see Fig. 6) then itreturns to the braking position automatically on its next round as described. The pin E (Fig. 6 and 9) is a stop to limit the fall of the plate B.

Fig. '7 illustrates a further modification of the construction member illustrated in Figs. 6 and 9 and in Figs. 7, 7 7, T is illustrated details of the important parts thereof. In this form of the device the outward movement of the tone arm is limited by the pin A? which on its first outward swing in the normal operation of the device engages the shoulder T of the adjustable band T. This band T may be adjusted to and hold in any position on the nxed tube or bearing A by the set screw T W hen the pin A? moves to this position against the shoulder T the outward movement of the tone arm is stopped and the friction member C will have p ssed over and dropped off the edge of the reord as above described, and the pawl C and the stylus will both be on the surface of the record. .ln coming to his position, however, the piif will have first engaged the shoulder U and will have turned it on its pivot T so that it no longer supports the latch or pivoted member V out of the path of the pin A When, therefore. the tone arm next moves inwardly to reproduce sound from the record the second. time. the pin A moves from under the latch or pivoted mem ber V whereupon the said pivoted member V falls downwa 'dly on its pivot V with the forward end V in the path of the pin A and little in advance of the shoulder T on the band T. The next time the arm is moved outwardly toward the periphery or edge of the record the stop pin A will engage the forward end of the latch or pivoted member V limiting the outward movement of the tone arm and preventing the friction member C from falling over the edge of the record, whereupon the friction member will now act as a brake to stop,

the continued rotation of the record.

The pivoted member ll is provided with an adjusting screw U threaded therethrough and having its inner end adapted to bear against the outer surface of the band T so that it will not turn on its pivot when adjusted to the position shown in Fig. 7 until it is engaged by the pin A on the tone arm. The friction between the end of the screw U any be'adjusted by turning said screw bacliwardly or forwardly as desired to produce the amount of friction which ma be required to hold the pivoted member U in such a manne that it will hold the latch V out of the path of the pin i and also so that when it is engaged by the said pin 3 it will readily turn to perniit the latch V to fall upon the withdrawal f I from under the free end V f the latch V.

The screw V is provided for the purpose of holding the latch or pivoted member V in its upward position and when it is desired to have the machine continuously repeat the selection on the .record, and to hold the member V in its lower position when it is desired to have/the device operate as a stop for a single reproduction of sound from the record. I

Either of these forms of friction member may be'used without the repetition apparatus as an automatic brake merely;

In the foregoing description of my invention, it'has' been made plain thatI have provided an attachment adapted to be connected to and operative with well-known types of disc talking machines, the attachment comprising briefly a member depending from a pivot substantially unitary with the sound box, said member having two portions or arms, one adapted to catch on a suitable projection provided on the surface of the record and by its engage-ment therewith to spring said member on its pivot to bring the other portion or record-engaging part there of, normally held out of contact with the surface of the record, into gripping and lifting engagement with the surface of the record to elevate the sound lbOX and stylus carried thereby to a position above the .surface of the record. The point of engagement with the record of said record engaging portion of the member is such that the friction between said member and the sur face of the record 18 effectivelto swing the arm and sound box over the record in the reverse direction to that which they had during the reproduction of sound from the record.

In connection with the 'aboveI have also provided and disclosed several means whereby the extent of the outward movement of.

the tone arm over the record may be varied so as to effect a repetition of the reproduction or a stopping of the rotation of the record, depending uponthe limit set to the out-ward swing of the sound box or tone arm. The mechanisms by which these operations are carried out may be varied but they all fall within the scope and aim of my invention so long as they are defined in the appended claims.

Having thus described my invention what- I claim and desire to protect by Letters Patent of the United States is: 7

1. In a talking machine having a tone arm, adapted to swing inwardly during the reproduction of sound from a record on said machine, a sound box carried by said tone :arm, a stylus, and means to rotate a record,

the combination of a record presenting a shoulder beyond the inner end of the sound record groove and extending transversely to said groove, a member carried by said sound box and lightly resting on the surface of said record during'the reproduction of sound therefrom at a point nearer the center of said record than is the stylus, and friction means drawn by said member, upon its engagement with said shoulder, into engagement with said record whereby said friction means lifts said stylus out of engagement with said record and the friction between said friction means and the surface of said record swings said sound box outwardly over the surface of the record to bring said stylus to a position adjacent the periphery of said record.

2. In a talking machine having a tone arm, a sound box carried thereby, a. stylus and means to rotate a record, the combination of a friction member mounted on a pivot substantially unitary with such'sound box and dependent therefrom, and a'shoulder on said record adapted to swing-said member to bring sa id friction member beneath said sound box and to lift the stylus from the record, whereby the friction between said friction member and the surface of said record swings said sound box and tone arm'outwardly toward the periphery of said record, and means to limit the outward movement of said tone arm, whereby the continued friction between said friction member and the surface of the record near the periphery of the record stops the rotawith said record, and drawn by said feeler.

into engagement'with said recordvwhensaid feeler engages said shoulder tolift the stylus above the surface of the record and maintain the same elevated, the friction between said record engaging means and said record being operative to swing said sound box and tone arm transversely over the record.

4. The combination with -a sound record provided with a sound record groove and with a portion presenting a transverse shoulder beyond the end of said groove, and means to rotate said record, of a pivoted tone arm, a sound box mounted on said arm,

a stylus carried by said sound box, a member ronnected to said sound box and floating on the surface of said record during the'reproduction of sound therefrom nearer. the center of the record than is said stylus, and record engaging means mounted on said sound box normally out of engagement with said record and drawn by said member into engagement with said record when said member engages said shoulder, whereby the friction between said record engaging means and said record lifts said stylus and swings said sound box outwardly to a position adjacent the beginning of said groove and moves said record engaging means over the edge of said record to again bring said stylus into reproducing relation with said sound record groove.

5. The combination with a sound record provided with a sound record groove and with a portion representing a transverse shoulder beyond the end of said groove, and means to rotate said record, of a pivoted tone arm, a sound box mounted on said arm, a stylus carried by said sound box, a member connected to said soundbox and floating on the surface of said record during the reproduction of sound therefrom nearer the center of the record than is said stylus, record engaging means mounted on said sound box normally out of engagement with said record and drawn by said member into engagement with said record when said member engages said shoulder, whereby the friction between said record engaging means and said record lifts said stylus and moves said sound box outwardly to a position adjacent the beginning of said groove and moves said record engaging means over the edge of said record to again bring said stylus into reproducing relation with said sound record groove, and means to prevent said record engaging means from falling over the .edge of the record at the end of the second outward movement of said tone arm and sound box.

6. The combination with a sound record provided with a sound record groove and with a portion presenting a transverse shoulder beyond the end of said groove, and means to rotate said record, of a pivoted tone arm, a sound box mounted on said arm, a stylus carried by said sound box, a member connected to said sound box and floating on the surface of said record during the reproduction of sound therefrom nearer the center of the record than is said stylus, record engaging means mounted on said sound box normally out of engagement with said record and drawn by said member into engagement with said record when said member engages said shoulder, whereby the friction between said record engaging member and said record lifts said stylus and swings said sound box outwardly to a position adjacent the beginning of said groove and moves said record engaging member over the edge of said record to again bring said stylus into reproducing relation with said sound record groove, to reset said floating member and record engaging member and to repeat the reproduction of sound from said record and means cooperating with said record engaging member to stop the rotation of said record after the second reproduction of sound therefrom.

7 An attachment for talking machines comprising a rigid member, means to pivotally support said member at one end so that it depends over a record on said talking machine, the depending end of said member being provided with two arms, the first of said arms being provided with a record engaging end, and the second of said arms normally extending below the level of the first of said arms and provided with a sharp edge adapted to float on a record and engage a shoulder on said record.

8. An attachment for talking machines comprising a rigid member, means to pivotally support said member at one end, the other end of said member being provided with two arms, the first of said arms being provided with a frictional record engaging end and the second of said arms being provided with a sharp edge adapted to float on the surface of a record and normally extending below the level of said first mentioned arm, said sharp edge extending generally toward said record engaging end.

9. The combination with a sound box, a stylus and a tone arm upon which said sound box is mounted, of a sound record tablet having a sound record groove therein and a transverse shoulder beyond and near the end of said sound record groove, means to support said record for rotation, a feeler car ried by said sound box and resting lightly on said record in advance of said stylus in its travel across said record in reproducing sound therefrom, and means actuated by said feeler when the same engages said shoulder to lift the rocord engaging end of said stylus out of said sound record groove and above the surface of said record and to stop the rotation of said record.

10. In a talking machine having a sound box, a stylus, a swinging arm on which said sound box is carried, said sound box and arm being carried across the record during the reproduction of sound by the engagement of said stylus with said record, the combination of a member pivoted to said sound box having a portion normally floating on the surface of said record. in advance of said stylus, and a friction portion normally out of contact with said record, and a shoulder on said record with which said floating portion engages when the stylus is at the end of said groove and operative to swing said friction portion into engagement with the surface of said record to lift said stylus and by the cooperation of said friction portion with said record to swing said sound box and arm in the reverse direction across or over said record.

11. In a talking machine having a tone arm, a sound box mounted thereon, a stylus, a record provided with a sound record groove and a shoulder transverse to said groove, and means to rotate sald record,

12. In a talking machine comprising a, tone arm, asound box and stylus, a record presenting a transverse shoulder at the inner end of the record groove thereof and means to rotatethe record, the combination of afriction member connected with a sound box and normally out of contact with said record, means-connected to, said friction member and engaged to said shoulder at the end of the reproduction of sound from said record to bring said friction member into engagement with said record to lift the sound box and, by reason of the friction between said friction member and said record, to swing said sound box outwardly and said friction member off the periphery of said record and to bring said stylus into the outer end of the record groove, whereupon the reproduction of sound from said record is repeated, and means set by said friction meniber 'at the end of its said first outward swing to limit and stop the second outward movement of said sound box and friction member before the latter reaches the periphery of the record.

13. In atalking machine having a tone,

arm adapted to swing over the record during the reproduction of sound therefrom, a sound box carried by said tone arm, a stylus and means to rotate a record, the combination of a record presenting a shoulder beyond the end of the sound record groove and extending transversely to said groove, a member carried by said sound box at a point nearer the end of the record groove than is said stylus and substantially on the surface of said record, and friction means drawn by said member upon its engagement with said shoulder into engagement with said record whereby said stylus is lifted out of engagement with said record and the friction between the friction means and the surface of said record swings said sound box and arm transversely over the surface of said record.

14. The combination with a sound record provided with asound record groove with a transverse shoulder beyond the inner end of said groove, and means to rotate said record, of a pivoted tone arm, a sound box mounted on said arm, a stylus carried bysaid sound box, an actuating member con'-' nected to said; sound box to move therewith and extending close to the surface of said record during the reproduction of sound therefrom at a point nearer the center of the record than is said stylus, a, friction; member mounted on said sound box normally out of engagement with said. record and adapted to be drawn by said member into engagement with said record when said actuating member engages said shoulder, whereby said stylus is lifted out of engage-- ment with said record and the, friction-between said friction member andsaid'record.

swings said sound box outwardly to the beginning of said sound record groove,eand. moves said friction member over the edge of said record to drop said sound box, and to bring said stylus into said recordgroove, to reset said actuating member and, said friction member and to repeat the reproduction of sound from said record, and

means to prevent said friction member from moving over the edge of said record upon the second outward movement of said, tone arm. l

15. An attachment for talking machines comprising a rigid member having two de pending arms, means to pivotally support said member so that it depends over a record on said talking machine, one of said arms being provided with a record-engaging end normally out of contact with the surface of said record, and the, other of said arms normally extending below the level of said first mentioned arm and adapted to' lie close to the surface of the record and to engage a, shoulder on' said record. V

16. An attachment for talking machines comprising a rigid member, means to pivotally support said member at one end, the other end of said member being provided with two arms, one of said arms being pro vided with an end adapted to frictionally engage a talking machine record and the other of said arms being provided with an end normally extending below and generally toward the end of said first mentioned arm.

17. In a talking machine havinga record, means to rotate the record and sound reproducing means including a stylus, the

combination with a friction member carried by said reproducing means and normally held out of engagement with the surface of said record and having a friction surface and said record carries said member under said reproducing means and against said stop to lift said reproducing means out of reproducing relation with respect to said record and to then hold said member stationary with respect to said sound reproducing means, and whereby the continued frictional engagement of said member with said record swings said sound reproducing means transversely over the record.

18. In a talking machine having a tone arm, a sound box carried thereby, a stylus and means to rotate a record, the combination of a record presenting ashoulder adjacent one end of the sound record groove in said record and extending transverse to said groove, a member operatively connected to said sound box and lightly resting on the surface of said record during the reproduction of sound therefrom, and friction means drawn by member upon its engagement with said shoulder into engagement with said rec 0rd whereby said friction means lifts said stylus from its engagement with said record, and the friction between said means and the surface of said record swings said sound box and arm transversely over the surface of sair record.

19. A stop-motion for motor-driven tall;- ing machines having therein av detector mounted in predetermined relation to the reproducing needle and comprising a part adapted to bear frictionally on the sound record, said detector being displaceable in respect to the record and its mounting by the energy of relative motion of the record and detector whenever the detector is enceun tcred by a part of the record of different character from the sound record proper, in combination with means for stopping the motion as a consequence of the displacement of the detector.

20. A stop-motion detector for talking machines comprising friction device adapted to feel the surface of the record, means adapting the detector to be thrown out of contact With the record by encounter of the friction-device with a surface abnormal to the sound-record surface, and means actuated on displacement of the detector for stopping the machine.

2-1. A stop-motion detector for talking machines comprising a part adapted normally to bear on the surface of the sound-record with a predetermined light pressure, and means whereby an impulse transmitted to said part by an abnormalsurface of the record may cause said part to take and retain another position out of contact with the record.

22. A talking-machine having therein a movable tone-arm, sound-box, and a record reproducing needle carried thereby, in combination with a stop-motion detector adapted to feel the surface of the record and to be displaced by a part thereof within the sound record, a mounting therefor rigid on and uzorable with the tone-arm, and means for stopping the machine controlled by said letector.

A talking-machine having therein a movable tone-arm, sound box, and a recordi-"eproducing needle carried thereby, in combination with a stop-motion detector movable about a pivot substantially tangential to the circular arc swept by the tone arm adapted to feel the surface of the record ahead of; the needle, a mounting for the detector adjustably fixed on the tone-arm, and means for stopping the machine controlled by said detector when displaced about said pivot.

In testimony whereof I have signed my name to this spec1licat1on.

F. B. MITCHELL.

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