US1154975A - Device for automatically stopping the turn-table of a phonograph. - Google Patents

Description

W. CUTHBERTSON.

DEVICE FORAUTOMATICALLY STOPPING THE TURN TABLEOF A PHONOGRAPH.

APPLICATION FILED MN. 26. 1915.

1,154,975. Patented'Sept. 28, 1915.

WITNESSES: 'IIY VENTOR,

DEVICE eon .AUIOMATICALLY secretive mam aaasm as "a s reamer WILLIAM? outrnnnnrson. on man:stannin1asessionv i s ecification of Letters Patent.

"ii?atente d Sept. 28,1915;

implication filed January 26, 1915. Serial No. 43 55. 1 v

To all who) it may concern I Be it known that 1, WILLIAM Cori-Ionizersox, a citizen of the United States of d ner ica, residing in the city of Pittsfield, county otBerlcshirg.and State of lllassachusetts, haveinvented certain new and useful lnv provennaits in Devices for Automatically Stopping the Turn-T able oi a Phonograph,

of which the following is a spe iiiication. This invention relates'to lI'DPI'OX'CHlEHtS 111 devices for automatically stopping the turn table of a phonograph or a talking machine at thecoinpletion oi the i llaying otthe record.

In many machines 1t is desirable to have some autoniatic device to bring the rotation of the turn table to a standstill at the termination of the playing of the record as the continued rotation of the turn table causes'a disagreeable scratching noise of the needle on the record. I i

The object of my invention is to provide a device that can be used to'stop the rotzr tion of the turn table when records of dif- 'ferentlengths are used,' that is to say, some pieces of music take longer time for them to be rendered than others and my device embodies achustablenieans, whereby the size of the record will not make any difference about automatically bringing the machine to a stop at the proper moment. Broadly, it comprises a plate adapted to be screwed to the casing of the machine, a pivotally mounted piece attached to this plate and provided with a brake lever that is pivoted to the pivotally mounted piece and which carries the pad that engages the turn table, also .an adjustable pointer from which leads a connection to the swinging'arni of the talking machine. whereby the position of this pointer can be adjusted tocorrespond with the size of the record and stop the machine when the 'record is finished.

Referring to the drawings. Figure l is a plan view showing in general the construction and arrangement of inf. improvement, the position of the "which carries the sound reproducing hox heing at the inward end of its travel or atfthe termination of the playing of the piece; Fig. 2 is a plan view on an enlarged scale showing the oresser foot in engagement with the edge of the turn table; Fig. 3 is a view similar to Fig. 2 but showing the position of the device in its-inoperative position; Fig. 4: is a side elevational view illustrating the adjustable nection of the angular-sinped aria.

} which holds the pad ,llange 3, l

turn table. I v l Referring to the drawings vin detail: 1 designates the casing which contains the usual motor parts of the machine, the usual turn table having the downtu-rned a record that is placed on the table 2 during'the playing of. the. same;

The usual arm to which the reproducingbox is connected is s'hown at 6. '7 designates a plate that is securedto the box 1 by means of the screws"indicatedat 8.

Extending upwardly from this plate are stops 9 and 10. Pivotally. secured to thisplate by means of the pin 11 is an angular shaped member 12. This member is formed with a projection 1 that is adapted to engage either one or the other oft'hestops!) orlO according to whether it is in braking or running position of .the table. :2. As shown in Fig. 2. it is in braking. position; and as shown in Fig. 3. it is in running position with the projection 13-..engaging the stop 9. The member lid-is formed, with two downwardly extending lugs'll and Bo. tatably mounted in these lugs is a screw 16 the inner end of which turns in a pivotal bearing 17 in the lug 15 andtheother in a pivotal bearing 18 in the lug ll. Carried by this screw is a pointerlSlywheteby when the milled head .20 is turned the pointer can bemoved baclnvard or forward over a: scale indicated at 21. Attachedtothis .pointer by means of a screw 22 is a chain or otheri'suit able engaging device "23 which leads to the arm (3., as shown in l? lg. 1. Pivotally. attached to the inner end of the angularshaped member 12 is a brake lever 25% to which the friction pad 25 is secured. Ex tending between the brake lever Qiand the inner end of the member 12 is a compression spring .26 which normally tends to forcethe brake lever outwardlyJ The brake lever is.

I pivotally attached tothe member 12 at the my. automatic stopping device its operation its travel, this arm is first swung into a may be Stated as follows: Considering the device in the position shown in Fig. 3','*lit being understood that the arm 6 is at the;

the pivotal memberj12 on its pivot 11. In order to determine at what point on the scale .21 the pointer 19 should be placed, in .order to automatically stop the machine when the-arm 6'reaches the inward end of position with the needle resting on the record corresponding to the end of the piece.

outer or starting edge of the record disk ,as the needle travels radially inward it turns- The pointer 19 is now moved over the scale 1 21 until the chain 23 is taut. Ifthis pointer stands at the numeral 6' for instance, the same numeral'is marked on the face of the record for future reference, preferably in the center portion thereof. Thus, when this record is later played the pointer is first adjusted to correspond with the numeral on the face of the record, as forexample 6.

\Vhen the needle arm reaches the end of the the friction pad25 will be automatically thrown into the stopping position, the spring 26 affording sufficient pressure to bring -the turn table to a stand stilL- When the record is removed and a new one put in its .place the operator of the machine simply, swings the brake device back into the position shown in Fig. 3,.and before the machine is again started with a new record he first adjusts the pointer 19 to correspond with the numeral on the face of the record, as

record the connection 23 will then move and for instance, 10. Then, when the needle reaches the end of the record, without any attention from the operator, the machine will be automatically stopped as before. It

will thus be seen that I have provided abrake mechanism that can be used with any size of record and one that will not in anyway interfere with the normal operation of the machine.

\Vhat I laimis: p 1. A stop device for talking machines comprising, aplate secured to the casing of the machine, a turn table, a swinging arm movable thereover. an angularly shaped member pivot ally attached to said plate, a. ointerdevice adapted to be adjusted along he upper surfaceo-fsaid member, a brake 7 lever pivotally connected to said member and a connecting device between the pointer and the swinging arm of the machine, whereby when the swinging arm reaches the inward position of itstravel the brake lever will be automatically brought into engagement with the turn table and the turn tabl brought to a standstill.

2. A stop device for talking machines comprising, a member-pivotally secured to the casingof'the machine, a turn table, a.

lever attached to said member, a pointer' swinging arm movable thereover, a brake pivotally secured to the-casing of the machine, stops to'limit the outward and inward movements of said member, a: brake lever pivotally attached to the inne ehd of said member and to which a frictional L-lake pad is secured, a compression sprin extendingsbetween the brake] lever and said lever member, a threaded rod,.a pointer attached' thereto whereby the pointer may be V moved intoditferent' positions,a swinging arm and .a connection extending from thepointer to the swinging arm of the machine, whereby when thepointer is set to a predetermined position and'the. swinging arm is at the inward limit of its travel, the fric-' tional pad will be automatlcally thrown against, the turntable and the turn table stopped, asdescrlbed. r

V lVILLIAM CUTHBERTSON;

- Witnesses:

GnoncnA. KENYoN, VVM. BARRQWS.

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