Circuit breaker system

Claim 1

A circuit breaker system comprising at least two circuit breakers, each breaker comprising an insulating housing having a handle-receiving opening, a circut breaker structure supported in each housing and comprising a pair of contacts operable to open and close an electric circuit, a handle protruding through each opening and being manually operable to open and close the contacts, a releasable member in an initial position and movable when released to a tripped position to effect automatic opening of the contacts, an elongated current-carrying bimetal, a magnetic member on the bimetal, a movable magnetic armature in a latching position to effect latching of the releasable member, biasing mounting means for mounting the movable magnetic armature on the bimetal in the latching position, the movable magnetic armature being movable to the magnetic member to effect unlatching of the releasable member upon the occurrence of overload currents in the bimetal, a trip cam in each housing, the trip cams of both housings being interconnected, each trip cam having a cam portion movable from a neutral position to a tripped position upon unlatching of the releasable member, each trip cam having a first elongated member to effect movement of the movable magnetic armature to the unlatched position, and the elongated members of the trip cam in one housing being effective for said movement in response to the movement of the cam portion of the trip cam in the other housing.