Electric circuit breaker with thermalmagnetic tripping allowing for overtravel of the thermal means

Claim 1

IN A THERMAL AND MAGNETIC CURRENT RESPONSIVE DEVICE, THE COMBINATION COMPRISING: (A) A SUPPORT; (B) AN ELONGATED BIMETALLIC STRIP FIXEDLY MOUNTED AT ONE END ON SAID SUPPORT AND HAVING ITS OTHER END MOVABLE; (C) A MAGNETIC FIELD PIECE MOUNTED ON SAID SUPPORT IN CLOSE PROXIMITY TO SAID BIMETALLIC STRIP; (D) AN ARMATURE ADJACENT TO AND MAGNETICALLY ENGAGEABLE BY SAID FIELD PIECE DURING OPERATION OF THE DEVICE UPON PASSAGE OF A LARGE OVERLOAD CURRENT THROUGH SAID BIMETALLIC STRIP; AND (E) MOUNTING MEANS PIVOTABLY MOUNTING SAID ARMATURE ON SAID SUPPORT, SAID ARMATURE BEING ENGAGEABLE BY SAID BIMETALLIC STRIP DURING OPERATION OF THE DEVICE UPON OCCURRENCE OF A PREDETERMINED OVERLOAD CURRENT TO PRODUCE PIVOTAL MOVEMENT OF SAID ARMATURE UPON ELONGATION OF THE HIGH EXPANSION SIDE OF SAID BIMETALLIC STRIP AND RESULTANT BENDING THEREOF, SAID MOUNTING MEANS PROVIDING A FIRST PIVOT FOR INITIAL PIVOTAL MOVEMENT OF SAID ARMATURE RELATIVE TO SAID FIELD PIECE AND A SECOND PIVOT FOR FURTHER PIVOTAL MOVEMENT OF SAID ARMATURE RELATIVE TO SAID FIELD PIECE TO ACCOMMODATE OVERTRAVEL OF SAID BIMETALLIC STRIP.