H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/327
H01H 71/66 (2006.01) H01H 3/30 (2006.01)
Patent
CA 1075749
11TR04219 ABSTRACT OF THE DISCLOSURE An operating device for an electric circuit breaker comprises a closing spring and a rotatable spring- controller mounted for rotation between first and second dead-center positions with respect to the spring. The spring is charged by transmitting rotational forces to the spring-controller through a main pawl mounted on the spring- controller and an abutment on a rotatable driving member. The main pawl is released from driven engagement with the abutment at the end of a spring-charging operation. Normal circuit-breaker closing is affected by allowing the spring to quickly discharge after a charging operation. A manual slow-close operation of the circuit breaker is effected through an auxiliary pawl mounted on the spring-controller in a position angularly-spaced from the main pawl. During normal spring-charging and discharging operations, this auxiliary pawl is prevented from engaging the abutment on the driving member. But when a manual slow- close operation is to be effected, engagement between the auxiliary pawl and the abutment is allowed. Rotation of the driving member during such engagement rotates the spring- controller through a slow-close operation. This slow-close operation is affected without assistance from the closing spring since prior to the manual slow-close operation, the closing spring is disabled while in its charged condition and held disabled during the slow-close operation.
283210
Barkan Philip
Barton Robert S.
LandOfFree
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