High interrupting capacity circuit breakers with electrodynamic latch release

Claim 1

A MULTIPOLE CIRCUIT BREAKER HAVING A COMMON OPERATING MECHANISM, PLURAL CONTACT ARM CARRIERS IN RESPECTIVE POLES OPERABLE IN UNISON BY SAID OPERATING MECHANISM FOR OPENING AND CLOSING ALL THE POLES OF THE CIRCUIT BREAKER CONCURRENTLY, PLURAL OVERLOAD RELEASE DEVICES IN SAID POLES, RESPECTIVELY, ARRANGED TO CAUSE AUTOMATIC OPENING OPERATION OF SAID OPERATING MECHANISM IN RESPONSE TO AN OVERLOAD IN ONE OR MORE OF THE POLES, CONTACT ARMS IN EACH OF SAID POLES, INTERPOSED MEMBERS IN EACH POLE PIVOTALLY SUPPORTING ONE OF SAID CONTACT ARMS AND PIVOTALLY CARRIED BY ONE OF SAID CONTACT ARM CARRIERS, RELEASABLE LATCHING MEANS INCLUDING NORMALLY ENGAGED PARTS ON EACH CONTACT ARM AND ON THE RELATED INTERPOSED MEMBER IN THE LATCHED FOR HOLDING EACH SAID ARM AGAINST CONTACT-OPENING MOVEMENT RELATIVE TO ITS INTERPOSED MEMBER IN THE LATCHED CONDITION OF SAID LATCHING MEANS, INDIVIDUAL RESILIENT BIASING MEANS ACTING ON EACH CONTACT ARM IN THE CONTACT-OPENING DIRECTION AND EFFECTIVE TO MOVE SUCH CONTACT ARM IN THAT DIRECTION UPON RELEASE OF SAID LATCHING MEANS, A PAIR