US1487127A - Stop for sound-reproducing machines - Google Patents

Description

March 18 1924.

o. F. STUPPAN STOP FOR SOUND REPRODUCING MACHINES Fue d Dec. 30. 19 21 WITNESSES Patented Mar. 18, 1924.

OTTO r. sTcrrAn,

or MILWAUKEE, WISCONSIN, Assrenoa 'ro COLUMBIA GRAPHO- PHONE MANUFACTURING COMPANY, or BBIIDGEPORT, CONNECTICUT, A CORPORA- TI01\T OF DELAWARE.

STOP FOR SOUND-REPRODUCING MACHINES.

Application filed December 30, 1921. Serial NO. 526,005.

T 0 all whom it may concern:

Be it known that I, OTTO F. STUPPAN, a citizen of theUnited States, and resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, haveinvented new and useful Improvements in Stops for Sound Reproducing Machines, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification. a

v'lhis invention-relates to stop mechanisms, and, in the embodiment selected as illustrative of the invention, is shown as applied to sound-reproducing machines.

An object of this invention is to provide a reliable, non-set automatic stop mechanism, which is simple, and yet durable, and which will not become disarranged or out of order in ordinary, or even abusive, use.

In'the drawings: Fig.1-is a plan view of azdevice embodying the invention; Fig. 2 is a side elevation view thereof; Fig. 3 is an enlarged detail plan view of the latch-mechanism.

In the drawings'the numeral 4: designates a brake member or lever pivoted on a pin 5 carried by a base plate 6 adapted to .be mounted on the frame of the reproducing machine, saidbrake having a shoe t. engageable with the flanged edge 7 of the turntable 8 of the reproducing machine. to stop the operation thereof, the brake being provided with a handle 9 for setting it.

A latch 10 is pivotally mounted on a pin 11 carried by the plate 6'and is adapted to engage a notch 12 in the brake lever t and is held in engagement with said lever. by means of a spring 13 connected at one end to the ear l4: struck up from the brake lever 1 andat its other end to the car 15 struck up from the base plate 6, said spring being offset to the opposite side of the center of the pin 5 from that of the notch 12 so that it acts to move the lever {t in a.counter-clock- Wise direction to hold the said lever against the toothed projection 16 of the latch.

When the latch 10 engages the lever saidlever will be held in inoperative position until the latch is released. For readily setting the latch to lock the brake, I have provided a projection 17 on the lever 4; which engages a projection 18 on the latch 10 and thereby causes the projection 16 to be moved into the slot '26 in said lever.

thenotch 12 as the brake lever is swung to its inoperative position. For releasing the inwardly as the stylus '20, travelsinwardly 1n the groove of the record 21, but .which acts upon said latch as soon as the stylus is latch, I provide meansinoperative while the tone-arm 19 swings given a-reverse motion upon the completion of the rendition of the record. For this purpose, I provide a lever 22 which is mountedon the pin 11 and operativelyconnected with the latch '10 by means of friction disks 23. This lever i connected to move with the tone-arm 19 by apin 24iqsecured by a clamp 25 to'said arm and engaging in When the playing of the record iscompleted, I provide an eccentric groove 27 in the record which, when traveled over by the stylus 20, causes an outward Or reverse movement of the tonearm 19 fromitsinward playing movement. With this construction the frictional connecplaying of the record is completed the Outtion' between the lever 22 and the latch 10 WtLIClSWlIlg of. the tone-arm by the action ofthe eccentric groove 27 causes thelever 22 to release the latch lO'from brake lever, this movement being very slight. but sulficient to unhook theprojection 16 of thelatch from the notch 12 sothat the spring 13 may then throw or swing the brake lever 4 into engagement with the turntable to'stop its rotation. 'By providing the cooperating projections 17 and 18. the latch may be readily maintained in operative position by holdin the handle 9 while the operator is adjusting, the stylus upon the record preparatory to playing the same, eventhough in moving the tone-arm to its starting position a reverse movement be produced on' the lever 22. Furthermore, the anchoring of the spring upon the frame reheves the latch of any pressure from the spring which would tendto move the latch in a radial direction toward the pin 5 so that the operation of the device ismade more-sensitive than that of my prior construction, as the friction.v disks only have to overcome the force which holds the brake against one side of the projection 16. Y

From the foregoing description it will be noted that it is not necessary to provide any special setting for the release of the latch 10 on the completion of the playing of the record, because this release is automatically effected by the reverse movement of the tone-arm, due to the groove in the record. Phis eccentric groove is nothing but a circular grooi e cut in the record off center so that at one point it meets with last groove of the record, and may be easily formed in the usual records without any special skill on the operators part.

I desire it to be understood that this in 'vention is not to be limited to any specific form or arrangement of parts except in so far as such limitations are specified in the claims.

What I claim as my invention is:

1. In a sound-reproducing machine, the combination of a record with an eccentric terminal groove producing a backward swing of the tone-arm when the playing of the record has ceased, a brake member, a latch for holding said member in inoperative position, an abutment on said member adapted to move said latch for operatively positioning the same with relation to said member on the movement of the brake member to inoperative position and means movable with said tone arm and operatively connected to the latch to release the same on a backward swing of the tone-arm.

2. In a sound-reproducing machine, the combination with the tone-arm, of a springactuated brake, a latch for holding said brake in inoperative position against the action of its spring, said brake and latch having interengaging parts cooperating to bring the latch to locking position when the brake is moved to an inoperative position, means movable with said tone-arm and operatively connected to the latch to release the same on a backward swing of the tonearm, and means causing a backward swing of the tone-arm when the playing of the record is completed.

3. In a sound-reproducing machine, the combination with the tone-arm, the record and the stylus, of a pivoted brake, a spring operatively connected at one end to a fixed part of the machine and at its other end to said brake, a pivoted latch engageable with said brake to hold it in inoperative position, interenga-ging cooperating projections on said brake and latch to move the latch to locking position when the brake is moved to an inoperative position, means moving with the tone-arm and frictionally connected with said latch to move the same to release the brake on a backward swing of the tone-arm, and a groove on the record engaged by the stylus when the playing of the record is completed to produce the backward swing of the tone-arm.

4. In a sound-reproducing machine, the combination with the tone-arm, the record and the stylus, of a base plate provided with a spring mounting, a brake lever pivoted on said plate and provided with a spring mounting, a spring connected to said mounting and disposed to one side of the pivot, a notch on said lever 011 the opposite side of said pivot, a pivoted latch engageable with th notch and cooperating with the spring to maintain said brake lever in inoperative position, interengaging cooperating projections on said latch and lever to move the latch to operative position when the brake member is moved to inoperative position, means moving with the tone-arm and frictionally connected with said latch to move the same to release the brake on a backward swing of th tone-arm, and a groove on the record engaged by the stylus when the playing of the record is completed to produce a backward swing of the tone-arm.

5. In combination, a brake member, a detent, and cooperative means between them adapted upon movement of the brake member to inoperative position, to move the detent into engagement with the brake member.

6. In combination, a brake member, a detent, and means on the brake member adapted to engage the detent upon movement of the brake member to inoperative position, to move the detent into engagement with the brake member.

7. In combination, a pivoted brake member, a pivoted detent adapted to be engaged and disengaged with said brake member to retain or release it, and cooperating means on the brake member and detent adapted to move the detent to brake-retaining position in engagement with the brake member upon movement of the brake member to inoperative position.

8. In combination, a brake member, means adapted to move the brake member to braking position, a detent adapted to be positively engaged with said brake member to retain the same in inoperative position, and cooperating means between said brake member and detent adapted upon movement of the brake member to inoperative position, to move the detent to operative position in engagement with the brake member.

9. In combination, a brake member, a spring adapted to move the brake member to braking position, a detent adapted to be positively engaged with said brake member to retain the same in inoperative position, and cooperatng abutments on said brake member and detent adapted upon movement of the brake member to inoperative position to move the detent t'o operative position in engagement with the brake member.

10. In a stop mechanism, a rotating element and a traveling element, and means whereby said traveling element is given a reverse movement at a predetermined point in its travel, a brake member, a detent adapted to be moved into locking relation with said brake member through the movement of the brake member to inoperative position, and means having frictional connection with said 'detent and adapted to move the detent to release the brake member upon said reverse movement of the traveling element.

11. A brake-lever having a notch and a projection, a catch for the brake-lever having a locking-tongue adapted to engage the notch in the brake-lever, and a projection adapted to be engaged by a projection on the brake-lever whereby movement of the brake-lever causes the catch to be positively moved to bring the locking-tongue thereon into engagement With the notch in the brake-lever.

In testimony whereof, I affiX my signature.

OTTO F. STUPPAN,

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