Circuit-breaking device for alternating current arranged for the compensation of electro-dynamic forces

Claim 1

AN ALTERNATING CURRENT CIRCUIT-BREAKER FOR OPENING A CIRCUIT IN RESPONSE TO A FAULT CURRENT HAVING AN OPEN AND CLOSED POSITION COMPRISING FIRST AND SECOND CONDUCTOR MEANS SERVING AS THE INPUT AND OUTPUT CIRCUITS, RESPECTIVELY, FOR SAID CIRCUIT-BREAKER, FIRST AND SECOND MOVABLE CONTACT MEANS PIVOTABLE ABOUT SEPARATE PARALLEL AXIES AND IN GRIPPING CONTACT WITH ONE OF SAID CONDUCTOR MEANS IN SAID CLOSED POSITION, SPRING MEANS FOR PIVOTING SAID MOVABLE CONTACT MEANS ABOUT THEIR RESPECTIVE AXES IN OPPOSITE DIRECTIONS TO SAID OPEN POSITION, SAID MOVABLE CONTACT MEANS BEING CONNECTED BETWEEN SAID FIRST AND SECOND CONDUCTOR MEANS SO AS TO MAINTAINED IN THE CLOSED POSITION IN THE PRESENCE OF APPLIED CURRENT OF AT LEAST MINIMUM MAGNITUDE BY THE ELECTRO-DYNAMIC FORCES GENERATED BY SAID CURRENT IN SPITE OF OPPOSING FORCES APPLIED BY SAID SPRING MEANS.