US1467793A - Nonset phonograph stop - Google Patents

Description

Sepa. u, 1923.., www@ L.. s.` HOPKINS NONSET PHONQGRAPH v STOP Filed oct. 2s 192; v 2 sheets-sheetA 1 Sept. M, E925 f L.. S. HPKINS NoNsET PHQNOGMPH sToP Filed oct. 2e. 1921 2 Sheets-Sheet 2 Patented Sept, lll, i923.

Ubllill@ LUTHER S. HOPKINS, OF DUBUQUE, IOWA.

NONSET PHONOGBAPH STOP.

Application filed October 28, 1921.y Serial No. 511,032.

all w iwf/nl t may concern.'

Be it known that l. LUTHER S. HorKiNs,

a citizen oi' the United States, and a resident ot the city of Dubuque, in the county of 5 Dubuque and State orl Iowa have invented certain new and useful lmprovements in a Nonset Fhonograph Stop; and l do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals ot' reference marked thereon, which t'orm a part of this specification.

This invention relates to an improved type ot an automatic non-set phonograph stop wherein a mechanism attached to the phonograph tone arm is adapted to cause automatic operation ot' a slidable bar tc kmove a brake shoe on said bar into trictional contact with the phonograph turntable to stop the operation ot' the phonograph motor when the tone arm ceases to move radially across a record being played.

lt is an object otf this invention to provide a phonograph stop which will automatically stop the rotation of a record carrying turntable when the playing needle reaches the innermost groove ot the record.

lt is also an object of the invention to provide a phonograph stop mechanism which need not be set to cause automatic stopping o'l the phonograph when the end of a record is reached.

lt is a further objectof the invention to provide a non-set phonograph stop mechanism which is adapted to be released by means oi a projection on the phonograph turntable shatt to stop the phonograph turntable when the phonograph needle and tone arm cease moving toward the center of a record being played. y v

.another object oit the invention is the c'onstruction ol a non-set phonograph stop mechanism having a means carried by the tone arm to cause automatic stoppingl of 'the phonograph motor at the completion ot' the playing` ot a record.

It is furthermore an object of the invention to provide a phonograph with a stop mechanism requiring no setting to cause the phonograph turntable to stop revolving when the tone arm stops moving toward the center of a-record being played.

It is an important object of this invention to provide a phonog 'aph with a stop mechanism embracing a slidable starting bar having a control means mounted thereon adapted to bek operated when the phonograph tone arm stops to cause the starting bar tol return to normal position to move a brake shoe carried thereby into trictional engagement with the phonograph turntable t0 stop the' same.

It is also an important object of the invention to provide a non-set automatic phonograph stop wherein a member actuated by la turntable spindle and means carried by a tone arm are adapted to coact with control means on a slidable brake shoe bar to cause automatic stopping of the phonograph motor at apredetermined time.

Other and further important objects of this invention will be apparent from the .disclosures in the specification and the drawings.

The invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure l is a top plan view of a phonograph showing the record and turntable partly broken away to disclose a non-set stop mechanism embodying the principles of this invention.

Figure 2 is a plan View of the non-setv phonograph stop mounted on a fragmentary portion ot the motor board showing the turntable rim and spindle in section.

Figure 3 is an enlarged detail section taken on the line 3--3 of Figure l, with the tone arm omitted.

Figure 4 is an enlarged/section taken on line lot' Figure l.

Figure 5 is a fragmentary plan view similar to Figure 2 showing the mechanisms in a position ready to release the brake bar.

Figure G is a fragmentary plan view of a modified form of the device.

As shown on the drawings:

The reference numeral 1 indica-tes a phonograph casing or cabinet provided with a motor boardv 2 for supporting the motor within the cabinet. Projecting upwardly through theI motor board 2 is a turntable sha'it or spindle 3 on the upper end of which a turntable 4f is removably supported. The turntable vis provided with a peripheral Flange 5. A grooved phonograph record 6 is positioned upon the turntable 4: ready to be played. Mounted upon the motor board 2 is a standard or base 7 for pivotally supporting one end of a swinging tone arm 8.

" By loosening the set screws 14 thek bracket 13 may be adjusted longitudinally with respect to the arm 11. A conveXly curved bow spring 15 has the end portions thereof looped and the ends secured to opposite l. sides of the channel member 13 by screws 16 or other suitable means.

Radially positioned uponthe motor board 2 below the turntable is a slidable starting or brake bar 17, the outer end of which projects beyond the periphery of the turntable and is provided with an integral thumb piece 18. Struck upwardly from the slidable brake bar 17 is a bracket or holder 19, the upper end of which is hook-shaped and rigidly holds a hard rubber or fibre brake shoe 20 in a position to engage the inside of the turntable flange 5. The brake bar 17 is provided with a straight longitudinal guide slot 21 near the bra-ke shoe holder 19 .and with a J-shaped slot 22. A screw 23 27, the other end of which is secured to the motor board 2. l

Disposed at an angle to the inner end of the brake bar 17 is an integral extension 28 bent upwardly at 29 toa-fiord a raised support 30 having stop lugs 31 and 32 integrally formed thereon. Rotatably mounted upon the brake arm extension 28 is a star 33 on onev of the points of which vertical pin 34 is secured. Attached to the turntable spindle 3 is a projection or finger 35 adapted to contact. the various points or arms of the star 33, thereby causing the star to revolve when the turntable. spindle rotates and when the brake bar 17 is in release or its inner aosition to permit the phonograph to play.

ivotally mounted upon theraised support 30 of the brake bar extension is an oscillating lever 36, having a felt tip or pad 37 secured on one end thereof for coaction with the bow spring 15 on the `arm 11 carried by the tone arm. A spring 38 has one end secured to the lever 36, while the other end presses against the stop 31 to normally hold the lever projected away from the stop 31 and against the stop 32, as illustrated in Figure 2. The' opposite end of the lever 36 is notched to aflord an inclined flange 39 and a lug 40.

Figure 6 discloses a modified form of non` set phonograph stop mechanism. 1n this case one end of an arm 41 is secured to the phonograph tone arm 8, while the other end projects beneath the turntable 4 and has a rigid convexly curved head 42 secured thereto. Frictionally contacting the convex surfacey of' the head 42 is a pad 43 carried on the free end of' a flat spring 44 which is secured to one end of a/lever 45. The lever 45 is pivotally mounted intermediate its ends on a support 46 which is rigidly secured upon the motor board 2. Stop lugs 47 and 48 are integrally formed on the support 46 to limit the throw of the lever 45. One end of a spring 49 is secured to the lever 45, while the other end ofsaid spring bears against the lug 47 to hold the lever 45 projected away from the lug 47 and against the lug 48. The other end of the lever 45 is notched at 50 and is provided with a short inclined flange and a lug similar to the construction hereinbefore described and illustrated in Figure 3. A pro-- jection or linger 51 is mounted on the turntable spindle 3 to coact with av star 52 rotatably mounted on the inner end of a slidable brake bar 53. A vertical pin 54 is secured on one of the arms or points of the star 52 to coact with the notched end of the lever 45 when the slidable brake arm is in its inner position to permit the phonograph to play. The outer portion of the brake arm 53 is constructed similar to the brake arm 1".

The operation is as follows:

The non-set automatic phonograph stop is adaptable for use on practically all types of phonographs and similar devices and in this case is associated with a brake controlled spring motor phonograph. A record 6 to bc played is placed upon the turntable 4 to permit the stylus 10 to be engaged in the outermost groove of the record. l/Vhen the tone arm 8 is swung into the position illustrated in Figure 1, the arm 11 is moved therewith, thereby positioning the bow spring'15 beyond the lever pad 37 and out of engagement therewith.

Normally the brake bar 17 is in its outermost position wherein the brake shoe 20 is in contact with the turntable fiange 5, thus holding the turntable and the phonograph motor mechanism stationary. The motor may be wound up in the customary manner. To start the phonograph motor operating, the brake bar 17 is pushed inwardly by pressing against the thumb piece 18 until the curved end of the slot 22 is reached, when the spring 27 acts to pull the brakfe bar sidewise to permit the screw 25 to seat in the curved end of slot 22 to hold the brake` bar in its inner position. The brake shoe 20 is thus moved out of engagement with the turntable Hange 5. The motor is thereby permitted to operate to rotate the spindle 3 and the turntable 4 carrying the record 6. Rotation of the spindle 3 causes the projection 35 thereon to engage one of the points of the star 33 at each revolution of' said spindle, thereby rotating the star which of course is moved into the field of operation of the spindle projection when the brake bar 17 is pushed inwardly. When the pin 34 on the star is moved into a position to contact the flange 39 of the lever 36, said lever is temporarily swung inwardly toward the stop 31 against the action of the spring 38. The pin 34 is vthus permitted to pass: said lever flange whereupon the spring 38 acts automatically to swing the lever back into normal position. This action occurs with each revolution of the star 33.

As the tone arm and the stylus travel inwardly over the record 6, the bow spring 15 is gradually brought into moving rictional contact with the lever pad 37, thereby acting with the spring 38 to return the lever 36 back into normal position against the stop 32 each time the lever is actuated by the star pin 34.

When the stylus 10 finally reaches the last groove of the record the tone arm 8 and the arm 11 stop moving inwardly, thereby causing the bow spring 15 to stop moving over the lever pad 37. Since the relative movement of the bow spring 15 with respect to the lever pad 37 is stopped, the lever when next swung inwardly by the star pin 34 against the stop 31 is held in such position as illustrated in Figure 5. With the next revolution of' the star the pin 34 is brought into contact with the lever lug 40, thereby holding the star against rotation causing the spindle projection 35 to throw the slidable brake bar slightly toward the spindle whereby the curved end of the J- slot is moved away Jfrom the screw 25, allowingthe spring 27 which was tensioned when the brake bar 17 was pushed inwardly, to act'automatically to slide the brake bar 17 outwardly into normal braking position with the brake shoe 2O frictionally contacting the turntable flange 5 to hold the turntable stationary thereby also stopping the phonograph motor.

lWith the parts positioned as shown in Figure 1, the tone arm and the auxiliary arm 11 carried thereby are permitted to be swung through a clearance arc to allow the stylus or needle 10 to be placed upon the outer portion of the record 6 withoutI effecting release of the brake bar mechanism.

In case a record being played is damaged and so prevents the tone arm from continuing inwardly toward the center of the record, the lever 36 will be held in position against the stop 31, thereby automatically causing the brake bar 17 to be projected outwardly into braking position when the star pin 34 is brought into engagement with the lever lug 40.

The stop mechanism is automatic and need not be set each time a record is to be played. |The brake mechanisms are automatically moved into the fields of operation of the spindle projection 35 and the member 15 on the auxiliary arm 11 when the brake bar 17, which is also the starting bar, is pushed inwardly. The brake shoe 2() is automatically moved into braking position against the turntable flange when the end of a record is reached or at any other time that the phonograph needle or stylus 10 fails to vadvance inwardly due to scratches, cracks, record defects or any other causes.

rlhe operation of the modified form of the non-set stop mechanism illustrated in Figure 6 is substantially the same as that already described. ln this case, however, it will be noted that the lever 45 is not mounted on the slidable brake bar 53 but is mounted on the motor board 2 supported on the stationary support 46. In this case the resilient member 44 is supported on the lever 45, while a rigid member 42 is attached to the arm 41 carried by the tone arm.

l am aware that numerous details of con-- struction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted l (Y) l) otherwise than necessitated by the prior art'.

claim as my invention:

1. In a phonograph, the combination with the phonograph tone arm and spindle, of a brake mechanism, members mounted on said brake mechanism, means on said tone arm adapted to frictionally move over one of said members, and means on said spindle adapted to actuate said members to automatically cause release of the brake mechanism and stop the phonograph when said tone arm ceases to move inwardly on a record being played, and stops the relative movement of the means on the tone arm with respect to one of said members.

2. The combination with a phonograph, of a friction mechanism controlled by the phonograph tone arm, and a slidable brake mechanism coacting therewith, adapted to be automatically operated to stop the phonograph when the friction at the friction mechanism is increased by the phonograph l tone arm ceasing to move inwardly on a record being played.

3. In a phonograph, the combination with the spindle, tone arm and turntable of the phonograph, of a slidable bar, a brake shoe thereon, controlling means on said. bar, a pivoted lever actuated thereby, resilient means on said spindle to actuate said controlling means, and means actuated by the tone arm having frictional engagement with said lever.

4. A non-set phonograph stop comprising a slidable bar, a control spring connected thereto, a brake shoe on said bar, a rotatable member on said bar, a member mounted on a phonograph spindle lor rotating said rotatable member, a spring controlled pivoted lever adapted to be actuated by said rotatable member, and means carried by a phonograph tone arm adapted to frictionally engage said lever and cause release to permit said spring to slide the bar into a position wherein 'the brake shoe will stop the phonograph when the tone arm stops mo ving inwardly across a record.

5. A non-set phonograph stop comprising a spring controlled slidable stopping bar, a. rotatable member on said bar, means mounted on. the phonograph spindle adapted to rotate said. member, a lever adapted to be actuated by said rotatable member, and means trietionally co-acting with said lever adapted at a predetermined time to hold said lever in a position to interfere with the rotation ot said. rotatable member thereby causing release of said slidable bar and stoppingof the phonograph.

G. A non-set phonograph stop comprising means actuated by the movement of a phonograph' spindle, a resilient mechanism attached to and movable with lthe phonograph tone arm adapted to 'trietionally co-aet with said means, and a brake device co-acting with said means and said mechanism. adapted to cause stopping ot the phonograph when thertone arm stops moving.

7. A phonograph stop device comprising a slidable brake means adapted to be manually moved into a position. to permit a phonograph to play, a rotatable member on said means, a member actuated by the phonograph motor adapted to cause rotation ot said rotatable member, a spring controlled pivoted member adapted to be actuated by said rotatable member, and means carried by the phonograph tone arm adapted a'tter a portion of a record has been played to .trictionally move over said spring controlled pivoted member until the tone arm stops moving when said tone arm means acts to hold the pivoted member in. a position to stop rotation o'l the rotatable member whereby the slidable brake means is automatically released to stop Ithe phonograph motor.

8. A phonograph stop mechanism comprising the combination with mechanisms actuable by the phonograph spindle and tone arm, or" a brake, and apivoted member adapted to be actuated by said mechanisms and co-acting therewith to cause .automatic .brake shoe supported thereon and normally held in engagement with the phonograph turntable to hold the same stationary, a control' spring connected to said bar and to the phonograph motor board, a star rotatably mounted on said bar, a pin carried by said star, a pivoted lever, a pad on one end thereof ttor co-action with the means on the` tone arm, an inclined flange and a lug4 integrally 'formed on the other end of said lever, stops for limiting the swing of said lever, a spring attached to said lever and contacting one oit said stops to normally hold said lever in a position to permit the star to be rotated,and means for holding said bar locked in a release position to permit the turntable to rotate and positioning the star and lever in the fields of operation of said spindle member and said tone arm means respectively to cause automatic unlocking of the brake bar and return of the same to braking position by said control spring to stop the turntable when the tone arm stops moving across a record being played.

l0. rlhe combination with a phonograph spindle and tone arm, of a'b'ralre, mechanisms connected therewith adapted to be actuated by the spindle, and means carried by the tone arm adapted to be frictionally moved over said mechanisms. I l ll. rllhe combination with a phonograph brake mechanism and tone arm, of members connecting the brake mechanism with the tone arm and havingrelative trictional movement with respect to one another when the tone arm swings and adapted to cause release or' the brake mechanism when said relative frictional movement is discontinued due to the stopping of the tone arm.

ln testimony whereof I have hereunto subscribed my name in. the presence of two subscribing witnesses.

LUTHER S. HOPKINS.

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