US1577453A - Nonset stop - Google Patents

Description

March 23 1926. WAEE F. H. DOERR NONS T STOP Filed June 8 1923 2 Shee'ts Sh i l fizz/ ,225?" 11/3 5 March 23 1926. 1,577,453

F. H. DOERR NONSET STOP Filed June a, 1923 2 Sheets-Sheet 2 Patented Mar. 23, 1926.

UNITED STATES 1,577,453. rarest orriee.

FRED H. DOERR, F GRAND RAPIDS, MICHIGAN, ASSIGNOR T0. CHENEY TALKING MACHINE COMPANY, OF CHICAGO, ILLIN Q 5, A CORPORATION OF ILLINOIS.'

NONSET STOP.

Application filed June 8,

To all whom it may concern:

Be it known that I, FRED H. Donna, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new; and useful Improvements in Nor-set Stops, of which the following is a specification.

This invention relates to a new and improved non-set stop for phonographs and more particularly to a stop of this character which is adapted for application to existing machines.

Various types of non-set stops have heretofore been devised which require large operating mechanism or alterations in the machine structure. Others have been devised which make an unsightly addition to the phonograph.

It is an object of the present invention to provide a new and improved non-set stop which is. compact and efficient and which is adapted for application to existing machines without material alteration thereof.

It is an additional object to provide a device of this character which may be frictionally driven by the turn-table and operated through contact with an arm swinging with the. tone arm.

It is also an object to rovide a non-set stop of the type described inwhich the automatic stop feature is inoperative with the stylus over the outer portion of a record and in which the brake may be manually applied at any time.

Other and further objects will appear as the description proceeds.

Various types of machines are nowin use having an arm swinging with the tone arm and adapted to engage a stop member which must beset at the desired stop position. In the. present construction, my device may be substituted for the set stop without other alteration of the machine, the non-set stop being controlled by contact with the arm swinging with the tone arm and driven by the turn-table.

In the drawingst Figure 1 is a plan view of the device, the arts being shown in starting position, ragmentary portions of the associated phonograph being shown in order to make clear the; application of the device thereto; Figure. 2 is a plan view of thedevice, the partsbeing in position ready to stop;

1923. Serial No. 644,111.

Figure 3 is a section taken on line 33 of Figure 1; r

Figure 1 is a section taken on line l4 of Figure 2; and I Figure 5 is a view on an enlarged scale taken on line 55 of'Figure 1.

The device is mounted upon the base plate llrwhich may be secured to the motor board 12 by means of screws 13. The drive shaft 14; is provided with the friction disk 15 adapted to contact with the underside of a phonograph turn-tabler An intermediate portion of the shaft is supported in the bearing 16 which is carried in the upturned end portion 17 of the base plate 11. The bearing 16 is thrust upwardly by means of spring 18 so as to yieldingly press the disk 15 against the underside of the turn-table.

The inner end of the shaft 14 is formed with the spiral thread 19 coacting with the gear 20. The inner end of the shaft 14 is supported in the bearing 21 struck up from the base plate 11. The shaft is restrained against longitudinal movement by the split washer 22 fitted in a circumferential groove formed in the shaft.

The gear is mounted upon the stud 23 and the cam disk 24 is secured to and rotated with the gear. This disk carries the positioning cam 25 and the brake cam 26. The bell crank release lever 27 is pivotally supported at 28 and is provided with the down- 'wardly directed flange 29 adapted to coact with the cams 25 and 26. The spring 30 is secured to the lever 27jby means of screw 31 and, as best shown in Figure 3, this spring 30 is provided with the downwardly extending foot 32 which engages the arcuate arm 33 of the friction lever 34-. The spring 30 is alsoprovided with a portion 35 bent down into a vertical plane. This-portion 35 is provided with a curved end 86 adapted to engage a cam ortion 87 formed on the friction arm 33 ora purpose to be described hereinafter. V

The stop 38 is struck up from plate 11 and serves to limit inward swinging movement of the arm of the lever 27. Thebell crank release lever 27 is provided upon its arm 39 with the downwardly extending projection 40 adapted to engage the latch lever 41.

The friction lever 34 is pivotally supported upon screw 42,which screw carries a spiral spring having one end 43 engaging a lug 4 1 struck up from the lever. The ac tuating arm 45 is also pivoted upon screw 42 and is provided with a struck up lug 46 engaged by the opposite end 47 of the spiral spring. The tendency of the spring is to maintain the lugs 44 and 46 in contact but to yieldingly permit their separation. The

. stop 65 is adapted to limit inward swing movement of the friction lever 34. The lever 34 is provided with a setting arm 48 having a cam surface 49.

The setting lever 50 is pivoted upon stud 51 and is provided with upturned end 52 adapted to engage the cam surface 49. The latch lever 41 is also pivoted upon stud 51 and is provided with extension 52 adapted to engage lug 53 to limit movement of the lever. The arm 41 is provided with the latch notch 54 adapted to engage the catch arm 55 of the brake lever 56.

This brake lever 56 is pivoted upon the screw 42 and is provided with the operating handle 57 and the brake pad 58, the latter being adapted to engage the rim 59 of the turn-table.

The brake lever is provided with the linger 60 adapted to engage the setting lever 50. The stop.6l is provided to limit outward movement of the brake arm. The brake lever is also provided with the arm 62 to which is secured one end of spring 63. The opposite end of this spring is secured at 64 to the latch lever 41.

Referring to Figure 1, the tone arm 66 is supported upon fixed collar 67 by means of movable collar 68 and adjustable studs 69. The movable collar 68 thus rotates with the tone arm. The finger 70 is secured to the collar 68 and is adapted to contact with the upwardly extending member 71 carried by the lever 45 during the latter portion of the playing of a record on the machine.

In the operation of the stop, in order to start the machine, the lever 57 is swung in the counterclockwise direction in order to move the friction pad 58 from contact with the turn-table rim 59. As the lever is moved in this direction, the catch finger 55 moves along the adjacent surface of the latch lever 41 until it engages behind the latch notch 54. Movement of this lever in the same direction is continued for a short are and the finger 60 engages the setting lever 50 causing it to rotate in the clockwise direction about its pivot 51. As this lever 50 is swung in this direction, its lug 52 engages cam surface 49 of the friction arm 34 and swings that arm to the position in which it is shown in Figure l abutting against the stop 65. The lever 57 may now be released and its clockwise motion is stopped by the engagement of the arm 55 with notch 54.

The turn-table will now start to revolve and the shaft 14 will be revolved due to the contact of the friction disk 15 with the turn-table. The direction of this rotation is such as to rotate gear 20 and cam disk 24 in the counterclockwise direction. The cam 25 will engage the down-turned portion 29 of lever 27 and rock that lever in a counterclockwise direction about its pivot 28.

This movement is suflicient to bring the downturned end 40 of the lever arm 39 substantially into contact with the latch lever 41 but is not such as to cause movement of the latter lever.

Immediately after the cam 25 clears the downturned portion 29, the lever 27 is rocked in the clockwise direction and restored to its former position by means of the spring portion 35, the end 36 of which is pressed in the clockwise direction by the cam 37 on the end of the friction arm 33 of lever 34.

The operation just described is repeated for each revolution of the cam disk until the finger 70, swinging inwardly with the tone arm, engages the projection 71 on lever 45.

As the tone arm continues to swing in the clockwise direction under the influence of the spiral groove upon the record, the en-- gagement of finger 70 and lever 45 causes the friction arm 33 to be rotated in the counterclockwise direction. As soon as this movement is started, the cam 37 is carried out of engagement with the portion 36 of: the spring 35 and the lever 27 is consequently no longer periodically restored by action of this spring.

However, the spring 30 is also provided with the down-turned portion 32 as shown in Figure 3 which portion makes frictional en gagement with the arm 33. Consequently, so long as the tone arm continues to swing inwardly, its motion is transmitted to lever 45 and by the friction arm 33 to the lever 27 by means of this frictional contact. This movement is suflicient to restore the down wardly extending portion 29 of lever 27 to its inner position against cam disk 24 in a period less than one revolution of that disk.

Consequently, the portion 29 is not engaged by cam 26.

However, as soon as the tone arm ceases to swing upon the stylus needle reaching the inner end of the record groove, no restoring motion is imparted to lever 27 and when thrust outwardly by cam 25 it remains in the outer position. It is then subsequently engaged by cam lug 26 which engagement thrusts the lever 27 to the right, thus rotating it in the counterclockwise direction about its pivot.

This rotation is such that the downturned portion 40 on arm 39 of the lever 27 thrusts the latch arm 41 a sufficient distance to release the catch finger 55. Upon this re lease the force of spring 63 exerted through its connection to the brake lever rotates that lever in the clockwise direction until the friction pad engages the depending edge of the turntable and stops the rotation of the turn-table. y

It will be observed that the automatic stop cannot function while-the tone arm and consequently the sound box and stylus are over the outer portion of the record. However, the arc of effective operation is suflioient so as to take care of a wide variation in the length of the record groove in various types of records. This lack of operation with the tone arm over the outer edge is of important value since the stop will not go into operation if the tone arm is momentarily held stationary while placing the stylus upon the record groove.

The engagement between the finger 55 of the brake lever and its notch 54 is preferably somewhat rounded so that if it is de sired to manually apply the brake during the operation of the record, this may be done by simply swinging the lever 57 in the clockwise direction.

I claim:

1. In combination with a rotating disk and a traversing member, means driven by contact with a lateral face of said disk and controlled by the movement of the traversing member adapted to release a brake for the disk upon cessation of movement by the traversing member.

2. In combination with a rotating disk and a traversing member, a brake lever for said disk, latch means for said brake, release means associated with the latch and with the brake lever whereby the latching movement of the brake lever serves to restore the latch release means to inoperative position.

3. In combination with a rotating disk and a traversing member, a brake lever for said disk, latch means for said brake, release means associated with the latch and with the brake lever whereby the latching movement of the brake lever serves to restore the latch release means to inoperative position, and means moving with the traversing member adapted to engage the release means to control its operation.

4. In combination with a rotating disk and a traversing member, a brake lever for said disk, latch means'for said brake, re lease means associated with the latch, said means comprising a release lever, means for moving said lever, and a friction lever adapted to be moved by means associated with the traversing member, spring means carried by the release lever and engaging the friction lever whereby in one position of the friction lever said spring means returns the release lever to normal position.

5. In combination with a rotating disk and a traversing member, a brake lever for said disk, latch means for said brake, re lease means associated with the latch, said means comprising a release'lever, meansfor moving said lever, and a friction lever adapted to be moved by means "associated with the traversing member, an arcuate arm upon the friction lever, and aspring carried' by the release lever and engaging the arm whereby movement of the friction lever is yieldingly transmitted to the release lever.

6. In combination with a rotating disk and a traversing member, a brake lever for said disk, latch means for said brake, release means associated with the latch, said means comprising a release lever, means for moving said lever, and a friction lever adapted to be moved by means associated with the traversing member, an arcuate arm upon the friction lever, a spring carried by the release lever and engaging the arm whereby movement of the friction lever is yieldingly transmitted to the release lever, and means driven by the disk adapted to impart a reverse movement to the release lever.

7. In combination with a rotating disk and a traversing member, a brake lever for said disk, latch means for said brake, release means associated with the latch, said means comprising a release lever, means for moving said lever, and a friction lever adapted to be moved by means associated with the traversing member, an arcuate arm upon the friction lever, a spring carried by the release lever and engaging the arm whereby movement of the friction lever is yieldingly transmitted to the release lever, means driven by the disk adapted to impart a reverse movement to the release lever, and in one position of said lever to engage it and thrust it to effect a release of said brake.

8. In combination with a rotating disk and a traversing member, a brake for said disk, a latch for said brake, and means for automatically releasing said latch upon cessation of movement by the tone arm, said means comprising a latch releasing lever, a frictional connection between said lever and a friction lever, means adapted to swing the friction lever during a portion of the movement of the traversing member, a cam and stop lug driven by the disk, the cam thrust ing the release lever in position for engagement with the stop lug, and movement of the friction lever in one direction serving to move the lever out of position for engagement with the stop lu 9. In combination with a rotating disk and a traversing member, a brake for said disk, a latch for said brake, and means for automatically releasing said latch upon cessation of movement by the tone arm, said means comprising a latch releasing lever, a frictional connection between said lever and a friction lever, means adapted to swing the friction lever during a portion of the movement of the traversing member, a cam and stop lug driven by the disk, the cam thrusting the release lever in position for engagement with the stop lug, movement of the friction lever in one direction serving to move the lever out of position for engagement With the stop lug, and associated means upon the friction and release levers Whereby in one position of the friction lever, the release lever is automatically moved out of position for engagement with the stop lug. 10

Signed at Grand Rapids, Michigan, this 4th day of June, 1923.

FRED H. DOERR.

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