Air-magnetic type circuit interrupter having planar blowout coils and primary conductor mounted puffer means

Claim 1

IN A CIRCUIT INTERRUPTER HAVING A PAIR OF CONTACTS ADAPTED WHEN SEPARATED TO PRODUCE AN ELECTRIC ARC THEREBETWEEN; ARC EXTENGUISIHING MEANS COMPRISING AN ARC CHUTE HAVING A LOWER REGION THROUGH WHICH THE ARC FIRST MOVES AND AN UPPER REGION IN WHICH THE ARC IS THEREAFTER MOVED A FIRST COMPOUND COIL ON ONE SIDE OF SAID ARC CHUTE, A SECOND COMPOUND COIL ON THE SIDE OF SAID ARC CHUTE OPPOSITE SAID FIRST COIL, EACH COIL COMPRISING TWO LOOPS OF CONDUCTIVE MATERIAL, THE FIRST LOOPS BEING LOCATED ON OPPOSITE SIDES OF SAID ARC CHUTE ADJACENT SAID LOWER REGION, THE SECOND LOOPS BEING LOCATED ON OPPOSITE SIDES OF THE ARC CHUTE ADJACENT BOTH THE LOWER AND UPPER REGIONS OF SAID ARCH CHUTE, THE LOOPS IN SAID FIRST COIL BEING SUBSTANTIALLY COPLANAR, THE LOOPS IN SAID SECOND COIL BEING SUBSTANTIALLY COPLANAR, THE PLANES OF EACH OF SAID COILS BEING SUBSTANTIALLY PARALLEL, FIRST AND SECOND ARC RUNNERS POSITIONED WITHIN SAID CHUTE ADJACENT OPPOSITE ENDS THEREOF, AND FIRST AND SECOND SPACED-APART INTERMEDIATE ARC RUNNERS WITHIN SAID CHUTE RESPECTIVELY SPACED INWARDLY AWAY FROM SAID FIRST AND SECOND ARC RUNNERS, EACH OF SAID COILS FIRST AND SECOND ELECTRICAL TERMINALS, SAID FIRST TERMINALS BEING COMMONLY CONNECTED TO SAID FIRST INTERMEDIATE ARC RUNNER, SAID SECOND TERMINALS BEING COMMONLY CONNECTED TO SAID SECOND INTERMEDIATE ARC RUNNER WHEREBY AT LEAST A PORTION OF THE CURRENT CARRIED BY THE ARC IS CONDUCTED IN PARALLEL THROUGH SAID COILS AND MAGNETIC FIELDS ARE THEREBY DEVELOPED BY SAID COILS FOR MAGNETICALLY MOVING SAID ARC UPWARDLY IN SAID CHUTE.