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专利名称：ACTUATING MECHANISM FOR OPERATING
HANDLE OF ELECTRICAL SWITCHING DEVICE
发明人：NEIL R. PALMER,JOSEPH R. KARGE,KENNETH
W. ERICKSON
申请号：US3688228D申请日：19710921公开号：US3688228A公开日：19720829
摘要：A remote-control actuating mechanism for the handle of an electric circuitbreaker. A single-pole double-throw switch selectively controls the direction of rotationof a gearmotor output shaft and of a crank arm resiliently connected thereto by a flatovertravel spring. The crank arm is provided with a cross member connected to the circuitbreaker handle. A pair of alternately operated normally closed ON and OFF limitswitches interrupt the flow of current through the motor of the gearmotor respectivelyin opposite directions. An operating member for the limit switches is disposed betweentheir depressible operating buttons and is provided with a lost-motion connection eitherto the crank arm or to the flat overtravel spring, the lost-motion enabling the circuitbreaker handle to move to tripped position without affecting the limit switches. Frictionholds the limit switch operating member in position when the circuit breaker trips andalso when the driving force thereon in either direction is released by the opening of thecircuit through the motor. The frictional force on the limit switch operating member isgreater than the restoring force on the depressible operating button of a limit switch,and hunting, i.e., repeated starting and stopping of the motor, is eliminated.
申请人：SQUARE D CO.
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