Patent GB-111511-A (GB)
Title: Improvements in Controlling Mechanism for Power Presses and other purposes.
Inventor: RAILING ADOLPH HARRY
IPC: G05G15/04
Filed: 1916-11-25
Abstract: 111,511. Railing, A. H., Peacock, A., and Hutchinson, T. H. Nov. 25, 1916. Driving-gear for winding and paying-out apparatus.-Relates to clutch-operating gear for use in stamping-presses, cranes, hoists, lifts, conveyers, &c., and in colliery wagon driving-gear in which the clutch is engaged or disengaged by operation of a control-lever, the clutch being automatically disengaged or engaged at the end of one or of any predetermined number of revolutions according to the length of the strip to be pressed or kept constantly in or out of action, according to the adjustment of a handle pivoted on the end of the lever, of a pedal, and of a ratchet counting-apparatus. Figs. 2 and 5 shows opposite sides of the control-lever 1, which carries a spring-pressed plunger 4 adapted to engage a notch 5 in a member 6, directly operating the clutch &c., and bring it to the position shown in the operation of lowering the lever and engaging the clutch. A bar 7 with cam surfaces 8, which is raised and dropped by cam action just before the ram of the press completes its stroke, slides through the plunger 4 and disengages it from the notch 5, so as to allow the clutch to be disengaged by spring action when the bar is held up to its work by supports 10, 15. The block 10 slides on the lever 1 and is connected by a slotted link 39 to a bell-crank lever 38 which is adapted to be moved by a stop 32 adjustable on a ratchetwheel 31 on a stationary bearing; the ratchetwheel is advanced one tooth at each operation of the press by a stop 35 on the bar 7 striking a lever 34 carrying a pawl 36. A pawl 37 prevents reversal of the wheel 31. The support 15 carries a lug 24 adapted to co-operate with the block 10, is moved downwards to the position shown against spring pressure by a pedal and rod 25, and is moved laterally by a handle 11 pivoted on the end of the shaft 1 and operating a block 20 connected to a slide 14 secured to the support 15 by a member 16. The lever 1 is held in its lower position by a gravity catch 55, which is disengaged by a lug 57 on the member 6 when the latter rises. When the handle 11 is moved up into alinement with the lever 1, the support 15 is brought against the block 10, so that, if the pedal is released, the bar 7 is supported by the block 10 and lug 24, and the plunger 4 is withdrawn and the clutch disengaged at the end of the revolution. If the pedal is lowered, the block 10 is released, the bar reciprocates idly and the clutch remains in engagement unless it is disengaged by the counting-mechanism. When the handle 11 is lowered to the position shown, the support 15 is withdrawn and the position of the pedal is immaterial, the clutch being disengaged when the block 10 is moved up by the link 39 to support the bar 7, after a predetermined number of operations determined by the position of the stop 32. Bars 43, 44 on the member 6 trip the pawls 36, 37 and allow the wheel 31 to return to zero under spring action when the lever 1 is lowered for a fresh operation. The pedal, handle, and ratchet-mechanism may he rendered inoperative by inserting a stop below the support 15, by preventing relative movement of the handle 11 and block 20, and by removing the block 35, respectively. A brake may be provided to prevent the ratchet-wheel 31 returning to zero on restarting if the machine is stopped by raising the handle 11 before it has operated the number of times for which it is set, so that it may complete the operations when restarted. When the invention is ap. plied to colliery engines, hoists, &c., a similar result is obtained by connecting the bell-crank lever 38 to the pawl 37 by a chain so that that pawl is only raised when the operations are complete. The lever 1 may be so arranged as to be raised to engage the clutch. Means for interlocking the ram and guard and also feed mechanism as described in Specifications 22104/14 and 111,512, [both in Class 83 (iv), Metals, Working], respectively, may be used