GB775330A - Improvements in or relating to an electric drive mechanism for a machine, such as a nut former or the like - Google Patents

Abstract

775,330. Electric motor driving arrangements. WATERBURY FARREL FOUNDRY & MACHINE CO. May 18, 1955 [May 24, 1954], No. 14336/55. Class 35. The crank-shaft 11 driving the gate of a nutforming machine is secured to a gear-wheel 12 engaged by a pinion 13 fixed to a jack shaft 14 upon which a pulley 17 is freely mounted, this pulley being adapted to be clutched to the shaft 14. A main motor 20 drives the pulley 17 through belting 18 and its shaft is extended to an air-operated clutch 21 by which the motor shaft may be secured to the shaft of a gear reduction unit 23, this unit being driven in turn by a reversible auxiliary motor 25. Thus, when the main motor is de-energized the auxiliary motor may drive the shaft 11 at low speed so that it may be inched in either direction in order to set up the tools of the machine. The motor 25 may also be used for slow starting, for overcoming the initial inertia before the main motor is energized to drive the mechanism at its normal operating speed. When a valveplunger 46 is in the position shown, a pipe 32 is in communication with line 50 so that air is supplied through conduit 31 to an inflatable clutch member 28, whereby pulley 17 and pinion 13 are clutched together. A pipe 42 communicates with pipe 51 through the valve in this position but the actuating member 39 of an air-operated brake is not effective unless pedal 54 is depressed. Actuation of an emergency push-button energizes solenoid 55 and the plunger 46 is moved to the right so that line 32 is connected to vent 45 and the clutch is released, permitting the pulley 17 to rotate idly on the shaft 14. At the same time, pipe 42 is connected to pipe 49 and the brake is set.