Circuit breaker operator with defeates interlock mechanism

Claim 1

Circuit breaker operator mechanism including a frame constructed to be fixedly mounted to an enclosure having a circuit breaker therein with a main section operatively positionable in front of and generally parallel to a circuit breaker housing surface having an operating handle extending forward thereof, a main operating handle including a manually engageable portion positioned in front of said main section and pivotally mounted with respect thereto, a cam unit disposed to the rear of said main section and connected to said main operating handle for operation thereby about a main axis generally at right angles to said main section, said cam unit including a portion engageable with a circuit breaker handle mounted for movement in a plane generally at right angles to said main section, a latch unit positioned behind said main section and including a cover latch portion for engaging and holding closed a cover of a circuit breaker enclosure, said cam unit including means to engage said latch unit and operate said cover latch portion to a cover releasing position when said main operating handle is in a first position, biasing means urging said latch unit to a blocking position, said cam unit having means engageable with said latch unit in its blocking position to prevent operation of said main operating handle to a second or circuit breaker closing position, said latch unit being moved to an unblocking position by engagement of said cover latch portion with an enclosure cover when the latter is in its closed position.