Abstract: A circuit breaker having separable contacts, thermal and magnetic trip means, a flexible conductive braid connecting the contacts and the trip means, and a latch mechanism for producing a series of vibrating impacts upon overcurrent conditions also includes a latch member of electrically insulating material to prevent undesirable parallel current paths and to increase the interruption current rating of the breaker.

Abstract: A multi-pole circuit breaker system includes a plurality of individual circuit breakers and at least one tripping action transfer device disposed between adjacent circuit breakers. The tripping action transfer device includes a lever pivotally supported at one end and carrying a rod shaped transfer member at its other end. The transfer member extends into the interior of the housings of adjacent circuit breakers and cooperates with their tripping mechanisms. A tripping operation of one circuit breaker engages the transfer member and causes actuation of the tripping mechanism of the adjacent breaker to initiate simultaneous tripping thereof.