Electrical protective devices

Claim 1

A FUSED CUTOUT CARTRIDGE COMPRISING AN ELONGATE FUSE TUBE OF INSULATING MATERIAL, STATIONARY CONTACT MEANS AT ONE END THEREOF, A FUSE LINK AXIALLY MOUNTED WITHIN SAID TUBE AND HAVING A LEAD AT ONE END SECURED TO SAID CONTACT MEANS AND A CONNECTOR AT THE OTHER END, A ROD ADAPTED TO BE DETACHABLY SECURED TO SAID CONNECTOR AND EXTEND AWAY FROM THE OTHER END OF SAID FUSE LINK ALONG A LONGITUDINAL AXIS THEREOF, A MOVABLE CONTACT AFFIXED TO SAID ROD, A METALLIC SOCKET ON THE OTHER END OF SAID FUSE TUBE, AN ELONGATE METALLIC CUP ADAPTED TO BE DETACHABLY SECURED TO SAID SOCKET AND HAVING A LONGITUDINAL AXIS ALIGNED WITH THAT OF SAID FUSE TUBE AND FUSE LINK, A PLURALITY OF FIXED RESILIENT CONTACT MEMBERS ELECTRICALLY CONNECTED TO SAID METALLIC CUP AND ENGAGED BY SAID MOVABLE CONTACT, AND MEANS BIASING SAID MOVABLE CONTACT OUT OF CIRCUIT-MAKING ENGAGEMENT WITH SAID FIXED RESILIENT CONTACT MEMBERS TO PROVIDE AN EXPANDING ARC GAP BETWEEN SAID MEMBERS AND SAID MOVABLE CONTACT WHEREBY UPON BLOWING OF SAID FUSE LINK THE ELECTRICAL CIRCUIT BETWEEN SAID STATIONARY CONTACT MEANS AND SAID FIXED RESILIENT CONTACT MEMBERS IS BROKEN BY TWO SERIES ARC-INTERRUPTING GAPS BOTH OF WHICH LENGTHEN IN PROPORTION TO THE MOVEMENT OF THE MOVABLE CONTACT AWAY FROM SAID CONTACT MEMBERS.