Patent ID: 6388860
Filing Date: 2002-05-14
Classification: A01F,H01H

Abstract:
A quick stop circuit for a quick stop mechanism coupled to an electrically operated actuator, the actuator being de-energized to move the quick stop mechanism to a stop position and the actuator being energized to move the quick stop mechanism out of its stop position, the circuit comprising:a potential source; a control unit; a normally closed switch connected between the potential source and the actuator; a normally open switch having a first terminal connected to the potential source and a second terminal connected to the control unit, the normally closed switch and the normally open switch being simultaneously operable via a common switch member, the control unit generating a shut down control signal in response to closing of the normally open switch and in response to opening of the normally closed switch; and a driver unit which controls energizing of the actuator, the driver unit being operatively connected to the normally closed switch and to the control unit, the driver unit de-energizing the actuator in response to the shut down signal and in response to opening of the normally closed switch.