US1604598A

US1604598A - Clutch mechanism for power presses

Info

Publication number: US1604598A
Application number: US723023A
Authority: US
Inventors: Osswald Herman
Original assignee: V & O Press Co
Current assignee: V & O Press Co
Priority date: 1924-06-28
Filing date: 1924-06-28
Publication date: 1926-10-26
Anticipated expiration: 1943-10-26

Description

Oct. 26 ,1926.

H. OSSWALD CLUTCH MECHANISM FOR POWER PREssEs Filed June 28. 1924 INVENTOR ATTORNEYS Patented Oct. 26, 1926.

UNITED STATES PATENT OFFICE;

HER-MAN OSSWALD, OF NIVERVILLE, NEVT YORK, ASSIGNOR TO THE V 8c PRESS COMPANY, OF HUDSON, NEW YORK, A CORPORATION OF NEW YORK.

CLUTCH MECHANISM FOR POWER PRESSES.

Application filed .Tune 28, 1924. Serial No. 723,023.

This invention relates to novel means for controlling the action of a power press of the type illustrated in United States Letters Patent No. 769,955, dated September 13th, 190st, where means are illustrated for look ing the operating shaft to the drive wheel by the clutch dog, and in United States Letters Patent. No. 880,289, dated February 25th, 1908, where means are illustrated for preventing the locking of the operating shaft to the drive wheel for more than a single revolution of the operating shaft in the event the operator should keep the shaft controlling treadledepressed a longer time than is necessary. p

This invention is particularly directed to means adjustable for wear for disengaging the latch from the switch plate after the switch plate has been moved a predetermined distance by the latch, due to the depression of the operating treadle.

This invention comprises a lever pivotally mounted on an eccentric bushing, said lever having one arm projecting into a circumferential groove inthe operating shaft in position to be engaged by the clutch dog when the shaft is clutched to the drive wheel, the other arm of the lever being located in position to engage a cam surface on the latch, said eccentric bushing being rotatively adjustable to bring the lever arms into accu rate position with respect to the operating shaft and the latch, and to compensate for wear on the parts.

A practical embodiment of my invention is represented in the accompanying drawings, in which Fig. 1 represents a power press of well known construction with my latch disengaging lever applied thereto, the parts being in the positions they assume when the treadle has been depressed to release'the slide from the clutch dog, and the clutch dog has moved around into position to engage the lever and move it to release the latch from the slide.

Fig. 2 represents an enlarged detail view of the same, with the parts in their normal position.

Fig. 3 represents a view similar to Fig. 2 with the parts in the positions shown in Fig. 1.

Fig. 41: represents a detail section taken in the plane of the line IV-IV of Fig. 2.

The pedestal 1 is surmounted by the frame 2, in which frame are mounted the drive wheel 3 and the operating shaft 4 which is arranged to be clutched to the drive wheel by the spring pressed clutch dog 5 which is moved nto engagement with the drive wheel by its spring (not shown herein) when the dog is released by the outward movement of the switch plate 6, which switch plate is slidably mounted in its guide frame 7 and yieldingly held at the limit of its inward movement by the usual springs 8 for holding the clutch dog released.

The treadle 9 which is pivoted at 10 to the pedestal lis yieldingly held at the limit of its. raised position by the spring 11. This treadle is connected by a rod 12 to a rock arm 13 pivoted at 14 to the frame 2.

A latch 15 is pivoted at 16 to the rock arm 13, the hook-end of which latch is arranged tobe engaged with and disengaged from an abutment 17 on the switch plate 6. This latch 15 is yieldingly pressed toward the abutment 17 by a spring actuated presser pin 18. v

The parts above described are substantially like the parts illustrated and described in the United States Letters Patent No. 880,239, hereinbefore referred to and a specific description of their operation will therefore be unnecessary, the present invention being directed to the novel adjustable control device for releasing the latch when the switch plate has been withdrawn to release the clutch dog, which device is constructed, arranged and operated as follows:

A latch releasing lever is pivotally mount-- ed on an eccentric bushing 19, one arm 20 of which lever engages the operating shaft 4 within a circumferential groove 21 in said shaft, across which groove the spring pressed clutch dog 5 extends. The other arm 22 of the latch releasing lever engages a cam surface 23 on the latch 15.

The eccentric bushing 19 is rotatively mounted on the shank of a screw bolt 24:, said bushing being provided with a flange 25 outside the hub of the lever,the peripheral surface of which flange is preferably knurled and provided with holes for facilitating the rotative adjustment of the bushing to bring the contacting surfaces of the

arms

20 and 22 of the lever into accurate position with respect to the operating shaft and the latch and to compensate for wear on said parts. After such adjustment the screw bolt 24; may be tightened to clamp the bushing in its rotativel adjust-ed position.

It will be understood that when the switch plate 6 is withdrawn by the latch 15, the clutch dog is moved by its spring to clutch the shaft to the drive wheel and at the same time it will form an abutment. in the said groove 21, so that as the shaft rotates the portion of the clutch dog located within the groove will come into engagement with the arm 20 of the latch operating lever and swing it outwardly, thereby swinging the arm 22 of the lever inwardly to release the latch from its engagement with the switch plate and permit the switch plate to be moved inwardly by its springs, to slide the clutch dog out of its locking engagement with the drive wheel and thereby disconnect the operating shaft therefrom.

From the above description it will be seen that I have provided a very simple and effective means for ensuring the release of the latch from the switch plate to prevent the drive wheel from rotating the operating shaft more than a single revolution, even though the treadle be held depressed.

It is evident that various changes may be resorted to in the construction, form and arrangement of the several parts without departing from the spirit and scope of my invention; hence, I do not wish to be limited to the particular embodiment herein shown and described, but what I claim is 1. The combination with the drive wheel, the operating shaft, the clutch dog carried thereby by locking the shaft to the drive wheel and the reciprocating switch plate for operating the dog, of an abutment on the switch plate, a latch engaging said abutment for holding the switch plate out of operation, and a latch releasing lever having oppositely disposed arms, one of said arms being arranged to be engaged by the dog in the rotation of the shaft and the other arm located in position to coact with said latch, whereby the actuation of the first named arm will cause the other arm to throw the latch out of engagement with the abutment on the switch plate.

2. The combinationwith the drive wheel, the operating shaft, the clutch dog carried thereby for locking the shaft to the drive wheel and the reciprocating switch plate for operating the dog, of an abutment on the switch plate, a latch engaging said abutment for holding the switch plate out of operation, a latch releasing lever having oppositely disposed arms, one of said arms being arranged to be engaged by the dog in the rotat-ion of the shaft and the other arm located in position to coact with said latch, whereby the actuation of the first named arm will cause the other arm to throw the latch out of engagement with the abutment on the switch plate, and means for moving the latch releasing lever to adjust the position of the arms with respect to the dog and latch.

3. The combination with the drive wheel, the operating shaft, the clutch dog carried thereby for locking the shaft to the drive Wheel and the switch plate for operating the dog, of an abutment on the switch plate, a latch engaging said abutment for operating the switch plate, a latch releasing lever operated by the dog in the rotation of the shaft for throwing the latch out of engagement with the abutment on the switch plate, and means for adjusting the position of the lever comprising a rotatively adjustable eccentric bushing on which the lever is pivotally mounted. I

f. The combination withthe drive wheel, the operating shaft, the clutch dog carried thereby for locking the shaft to the drive wheel and the switch plate for operating the dog, of an abutment on the switch plate, a latch engaging said abutment for operating the switch plate, a latch releasing lever operated by the dogin the rotation of the shaft for throwing the latch out of engagement with the abutment on the switch plate, means for adjusting the position of the lever comprising a rotatively adjustable eccentric bushing on which the lever is pivotally mounted, and means for clamping the bushing in its adjusted position.

5. The combination with the drive wheel, the operating shaft, theclutch dog carried thereby for locking the shaft to the drive wheel and the switch plate for operating the dog, of an abutment on the switch plate, a latch engaging said abutment for operating the switch plate, a latch releasing lever operated by the dog in the rotation of the shaft for throwing the latch out of engagement with the abutment on the switch plate, means for adjusting the position of the lever comprising a rotatively adjustable eccentric bushing on which the lever is pivotally mounted, and means for clamping the bushing in its adjusted position comprising a screw bolt on which the bushing is mounted.

6. The combination with the drive wheel, the operating shaft, the clutch dog carried thereby for locking the shaft to the drive wheel and the switch plate for operating the dog, of an abutment on the switch plate, a latch engaging said abutment for operating the switch plate, and a latch releasing lever, one arm of which engages the latch and the other arm of which is located in position to be moved by the dog in the rotation of the shaft for throwing the latch out of engagement with the abutment on the switch plate.

7 The combination with the drive wheel, the operating shaft, the clutch dog carried thereby for locking the shaft to the drive wheel and the switch plate for operating the dog, of an abutment on the switch plate, a latch engaging said abutment for operating the switch plate, and alatch releasing lever, one arm of which has a cam enga ement with the latch and the other arm of W iich is located in postition to be moved by the dog in the rotation of the shaft for throwing the latch out of engagement with the abutment on the switch plate.

8. The combination with the drive wheel, the operating shaft having a circumferential groove therein, a clutch dog carried by the shaft for locking the shaft to the drive wheel and a switch plate having a cam engagement with the dog within said groove for operating the dog, of an abutment on the switch plate, a latch engaging said abutment for operating the switch plate and a latch releasing lever, one arm of which engages the latch and the other arm of which is located in the groove in position to be engaged and rocked by the dog in the rotation of the shaft for throwing the latch out of engagement with the abutment on the switch plate.

9. The combination with the drive wheel, the operating shaft having a circumferential groove therein, a clutch dog carried by the shaft for locking the shaft to the drive wheel and a switch plate having a cam engagement with the dog within said groove for operating the dog, of an abutment on the switch plate, a latch engaging said abutment for operating the switch plate, and a latch releasing lever, one arm of which has a cam engagement with the latch and the other arm of which is located in the groove in position to be engaged and rocked by the dog in the rotation of the shaft for throwing the latch out of engagement with the abutment on the switch plate.

In testimony, that I claim the foregoing as my invention, I have signed my name this 26th day of June, 1924.

HERMAN OSSWALD.