Auxiliary operator for circuit interrupting apparatus with inter

Details Auxiliary operator for circuit interrupting apparatus with inter Auxiliary operator for circuit interrupting apparatus with inter

1990-05-21

1991-05-28

Scott, J. R.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

H01H 922

Patent

active

050196766

ABSTRACT:
A removable control unit of a motor control center has an auxiliary operator handle linked to a molded case circuit breaker handle for control of the circuit breaker externally of the motor control center cabinet. An interlock slide bar is driven by the auxiliary handle to an extended position to block removal of the unit with the circuit breaker in the ON condition, and follows the handle by gravitational force to a withdrawn position upon movement of the handle to an OFF condition of the circuit breaker, the slide bar abutting a fixed stop prior to the handle reaching the OFF condition to separate the handle from the slide bar in the OFF condition. A spring carried on the interlock slide bar is engaged by the handle to effect driving engagement, compression of the spring occurring only as the handle is nearly in the ON condition.

REFERENCES:
patent: 4034169 (1977-07-01), Armstrong et al.
patent: 4074091 (1978-02-01), Bischaf et al.
patent: 4760220 (1988-07-01), Fritsch et al.
patent: 4789919 (1988-12-01), Cox et al.

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