Drawout type circuit interrupter with interlocked levering mecha

Details Drawout type circuit interrupter with interlocked levering mecha Drawout type circuit interrupter with interlocked levering mecha

1975-04-02

1977-01-11

Scott, James R.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

H01H 922

Patent

active

040028658

ABSTRACT:
An enclosed circuit interrupter includes a removable drawout unit mounted within an enclosure and sealed by an enclosure door. The drawout unit is movable between a connected position and a disconnected position by a levering mechanism operated by a levering crank. A shutter prevents insertion of the levering crank unless the circuit interrupter is tripped by actuation of a trip plate. An interlock prevents removal of the inserted levering crank when the drawout unit is at any position intermediate the completely connected and completely disconnected positions. Closing of the enclosure door is prevented when the levering crank is inserted.

REFERENCES:
patent: 2273002 (1942-02-01), Mahoney
patent: 2617862 (1952-11-01), Caswell
patent: 2777024 (1957-01-01), West
patent: 2921998 (1960-01-01), Pokorney et al.
patent: 3219771 (1965-11-01), Umphrey
patent: 3578925 (1971-05-01), Drown et al.
patent: 3783209 (1974-01-01), Cleaveland et al.

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