Westinghouse Electric Corporation

Lawrence B St Clair

Charles R Paton

John G Salvati

An electrical switching device characterized by an enclosure containing a switch operable between ON and OFF positions by a handle releasably lockable in the OFF position; the handle being disposed between the enclosure and a handle guard, the guard having an opening, the handle having a tab engaging a shoulder surface in the opening when in the OFF position; an interlock plate for releasably latching an enclosure cover in place and the plate being releasable by movement of the handle in the OFF position; and the handle being movable to the ON position only by manipulation of the interlock plate, whereby accidental movement of the handle is avoided.

Electrical switching device

A molded case circuit breaker enclosed in a metal cabinet with an openable cover. An operating mechanism has a mounting plate secured to the face of the circuit breaker and a sliding plate movably supported on rollers by the mounting plate at the side of the circuit breaker. A handle mechanism is secured to the sliding plate with a portion extending through an aperture in the cabinet cover. A gasket is disposed between the handle mechanism and the interior of the cabinet cover. The handle mechanism is spring-loaded against the gasket and interior of the cabinet cover to provide a dust-tight seal.

Growing community of inventors

Beaver, PA, United States of America

Lawrence B St Clair