US1491932A - Automatic stop for sound-reproducing machines - Google Patents

Description

April 29, 1924.- 1,491,932

0. F STUPPAN AUTOMATIC STOP FOR SOUND REPRODUCING MACHINES Filed Oct. 12. 1921 '2 Sheets-Sheefl FIG. 1

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ENTOR ATV-OR E Apri? 29, 1924. 1,491,932

0. F STUPP'AN AUTOMATIC STOP FOR SOUND REPRODUCING MACHINES Filed Oct. 12, 1921- 2 Sheets-Sheet 2 INVENTOR 0550 FJlu apafi/ ATTORN EY Patented Apr. 29, 1924.

UNITED STATES I P AT in32 I OTTO F. STUPBAN, F MILWAUKEE, WISCONSIN, ASSIGNQR TG'fiOLUMIBIA GRAIHO- IPHONE MANUFACTURING COMPANY, QF BRIDGEPO'RT, CONNECTICUT, A CORPORA- TION OF DELAWARE.

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Application filed October 12, 1921. Serial Ho. 507,268.

To all uihom it may concern Be it known that I Or'ro F. STUP-PAN, t

- citizen of the United states and resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Automatic 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.

The invention relates to automatic stops for sound reproducing machines.

The object of the invention is to provide stop mechanism of a novel character for an: tomatically stopping the drive of the machine when the playing of the record has been completed without the necessity of setting the stop mechanism.

A further object of the invention is to provide a stop mechanism for sound reproducing machines which is automatically operated by a reverse movement of the tonearm on a completion of its inward travel on the record.

The invention further consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings: Fig. 1 is a plan view of a device embodying the invention; Fig. 2 -is a side elevation view thereof.

Figure 3 is a plan view of the device, the full lines showing the position of the parts when the tone-arm is swung to an extreme.

position to release the brake, and the dotted lines showing the position of the parts when the brake is applied, and

Figure 4 is a detail view in plan of parts shown in Figure 3, the coil spring being omitted for the sake of clearness.

In the drawings the numeral 3 designates a brake member or lever pivoted on a pin 4 carried by a base plate '5 and engageable with the flanged edge of the turntable 6 to stop the operation of the machine, the brake being provided with a handle 7 for setting it.

A latch 8 is pivotally mounted on a pin 9 carried by the plate 5 and .is held in engagement with a notch 10 in the brake lever 3 by means of a spring 11 secured at one end toa projection 12 on the brake lever and at the other to an arm 13 on the latch. When the latch 8 engages the lever, said'lever will be held in inoperative position until the latch is released.

F or releasing the latch I provide means which is inoperative while the tone-arm 14 swlnlgs inwardly as the stylus 15 travels inwar ly in the playing groove of the record 16, but which acts upon said latch as soon as the stylus is given a reverse motion upon the completion of thdrendition ofthe record.' For this purpose I provide a lever 17 which is mounted on the pin 9 and operatively connected with the latch 8 by means of friction disks 18. This lever is connected to move with the tone-arm 14 by a pin 19 secured by a clamp 20 to said arm and engaging in a slot 21 insaid lever. When the- QFHCE With this construction the frictional con-.. i

motion between the lever 17 and the latch 8 permits relative movement between said parts when the tonearm 14 moves inwardly while the record is being played and such movement of the lever 17 also acts in conjunction with the spring 11 to hold the latch 8 against the brake lever. When the playing of therecord is completed the outward swing of the tone-arm by the action of the eccentric groove 22 causes the lever 17 to oppose the spring 11 and release the latch 8 from the brake lever, this movement bein very slight but sufiicient to-unhook the late so that the spring 11 may then throw or swing the brake lever 3 into engagement with the turntable to stop its rotation.

After the turn-table has been stopped in the manner just described, the brake may be released and the turn-table again permitted'to rotate, by swinging the tone-arm into the extreme position shown in full lines in Figure 3 of the drawings. In this posi tion of the tone-arm, the latch 8 is swung on its pivot 9 a distance sufiicient to move the spring 11 from one side of the pivot 4 to theother side thereof, and thus cause the spring to rock. the brake member on its pivot in a direction away from the flanged edge of the turn-table. As the tone-arm is moved inwardly from the full line position of Figure 3 towards the outer edge of the record, the latch 8 will be swung upwardly .-noted that it is not necessary to provide any special setting for the release of the latch 8 on the completion -of the record, because this release is automatically effected by the reverse movement of the 'tone-arm, due to the groove in the record. This eccentric groove is nothingbut' a circular groove cutin the record off center so that at one point it meets the last groove of the record and may be easily formed in the usual reords without any special skill on the operators part.

I desire it to. be understood that this invention 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 praying of the record has ceased, brake mechanism, including a member, a detent therefor, and a spring connecting the brake member and detent, and adapted to actuate them to braking and retaining positions, respectively, and means operating on said brake mechanism during the backward swing of the tone-arm to stop the operation of the machine.

2. In a sound reproducing machine, the combination with the tone-arm, of a brake member, a latch pivoted for holding said member in inoperative position, means movable with said tonearm and pivotally mounted to rotate about the pivotal axis of the latch and means exerting axial frictional pressure between the latch, and means whereby the latch is released upon a backward swing of the tone-arm, 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 t e tripping lever of the brake mechanism, the record, the stylus and the tone-arm, of means moving with the tone-arm and having a frictional pivot connection with said lever to operate the same on a backward swing of the tone arm, and means on the record engaged by the stylus when the playing of the record is completed to produce t e backward swing of the 4. In a sound reproducing machine, the combination, with t e tripping lever of the brake mechanism,the record, the stylus and the tone-arm, of a member moving with the tone-arm, asprin washer establish-ingfri'ctional connection etween the lever and said emember, whereb the lever is operated on a backward swing of the tone-arm, and means on the record engaged by the stylus when the playingv of therecord is completed to produce the backward swing of the tonearm.

5, In combination, a brake, ar -detent, a

single spring adapted to move both the brake and the detent to; effective position,

andmeans including the said spring for moving the brake to ineffective position.

6. In combination, a' traveling member, a rotating member, a brake 'for the latter, a pivoted detent, an operating arm-having a pin and-slotconnection with the traveling member and mounted coaxial withthe detent and having frictional connection therewith.

7. In a stop mechanism, a brakemember, a detent for retaining the brake member 'in non-braking position, and a single spring adapted to yieldin ly retain the brake member in brak ng an to move the brake member to non-braking position.

8. 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 inits travel, a pair of coaxially mounted members, one adapted to be movedby said traveling element, and the other adapted to actuate the stop mechanism to stopping position upon movement in one direction, and means exerting pressure coaxially of said member to establish a frictional connection between them, whereby movement of the traveling element in reverse direction moves said actuating member in stop-actuating direction.

9. In a stop mechanism, a rotating ele-,

ment and a traveling element, and means whereby said traveling element is given a reverse movement at a predetermined point in its travel,'a pivoted brake member, a pivoted detent adapted to be moved in one direction to release said brake member, and

a member having frictional connection with .said detent and operatively connected to said traveling element, whereby movement of said travelin element in reverse direct1on operates sal detent to release the brake member.

10. In combination, a-traveling element having forward and backward movements,

11.'In combination, a traveling element Lsanasa I having forward and backward movements, a rotating element, and a brake for the rotating element, and means for a plying the brake operable automatically oniy when the traveling element is given a predetermined, backward movement.

12. In combination, a turn-table for supporting'a record, a tone-arm advanced over the turn-table by the rotation thereof, a brake for causing the rotation of the turntable to cease, and brake-applying means automatically operative only as an incident to a predetermined backward movement of the tone-arm under the influence of the record.

13. In combination, a turn-table for supporting a record, a tone 'arm advanced over the turn-table by the rotation thereof, a

brake for causing the rotation of the turntable to cease, and brake-applying means automatically operativelonly. as an incident to a predetermined backward movement of the tone-arm under the influence of the record, the said means itself causing the release of the brake upon a backward move-. ment' of the tone-arm toward the edge of the record in excess to such predetermined backward movement.

14. In combination, a turn-table for supporting a record, a tone-arm advanced over the turn-table by the rotation thereof, a

brake for causing the rotation of the turntable to cease,

and brakerapplying means automatically ope'rativeonly as an incident to a predetermined backward movement of the tone-arm under the influence of the record, the said means itself causing the release of the brake upon abackward movementpf the tone-arm toward the ed e of the record and being adapted to cause t e brake member to be yieldingly' urged to efiective positionwhen the tone-arm is advanced toward the playing position. v v

15. In combination, a brake lever, a spring having one end connected to the brake lever, a lever connected to the other end "ofthe" spring, the last-named lever whereby the spring is caused to yieldingly urge the brake lever toward operative position, or to yieldingly retain the brake lever in inoperativeposltion. I

16. lln combination, trollinglever for the brake lever, a sprin connectin "the two named members an normally% ing in a line at one side of the pivot point of the lever, and means for shifting the position of the brake-controlling lever, to cause the s ring to cross the pivot point ofthe brake liiver and. to retain the brake lever in inefi'ective position.

and means for shifting a brake lever, a cono'rro r. s'rnrraiv.

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