Thermal electric circuit breaker

Claim 1

IN AN ELECTRICAL SWITCH, THE COMBINATION OF: A CASE; A FIXED CONTACT MOUNTED IN SAID CASE; A MOVING CONTACT CARRIED ON A CONTACT ARM FOR ENGAGEMENT WITH SAID FIXED CONTACT; A PIVOT ARM MOUNTED IN SAID CASE FOR PIVOTING MOVEMENT BETWEEN CONTACT CLOSED AND OPEN POSITIONS DURING NORMAL OFF-ON OPERATION OF THE SWITCH, WITH SAID CONTACT ARM PIVOTALLY CONNECTED TO SAID PIVOT ARM AT A PIVOT POINT SPACED FROM SAID MOVING CONTACT; AN OVERCENTER SPRING CONNECTED BETWEEN SAID CONTACT ARM AND A POINT FIXED RELATIVE TO SAID CASE FOR URGING SAID CONTACT ARM TO THE CLOSED POSITION WHEN SAID SPRING IS ON ONE SIDE OF SAID PIVOT POINT AND TO THE OPEN POSITION WHEN SAID SPRING IS ON THE OTHER SIDE; AND AN ACTUATING MEMBER MOUNTED IN SAID CASE FOR MOVEMENT BETWEEN CONTACT CLOSED AND OPEN POSITIONS, SAID ACTUATING MEMBER INCLUDING MEANS FOR ENGAGING SAID PIVOT ARM TO ROTATE SAID PIVOT ARM AND MOVE SAID PIVOT POINT TOWARD THE OVERCENTER CONDITION AS SAID ACTUATING MEMBER IS MOVED BETWEEN CONTACT CLOSED AND OPEN POSITIONS, PRODUCING A TRANSLATING MOTION OF SAID CONTACT ARM AS SAID PIVOT POINT APPROACHES THE OVERCENTER CONDITION.