Fusible protective devices for cable protection

Claim 1

A FUSIBLE PROTECTIVE DEVICE FOR THE PROTECTION OF CABLE NETWORKS COMPRISING A TUBULAR CASING OF HEAT-RESISTANT INSULATING MATERIAL; A PULVERULENT ARC-QUENCHING FILLER WITHIN SAID CASING; A PAIR OF TGERMINAL ELEMENTS CLOSING THE ENDS OF SAID CASING, EACH OF SAID PAIR OF TERMINAL ELEMENTS INCLUDING A BLOCK OF SOLID METAL; TUBULAR CABLE CONNECTOR MEANS ARRANGED IN COAXIAL RELATION TO SAID CASING FORMING AN INTEGRAL PART OF AT LEAST ONE SAID PAIR OF TERMINAL ELEMENTS; MULTIPERFORATED RIBBON FUSE LINK MEANS OF A METAL HAVING A FUSING POINT IN THE ORDER OF 1000 DEG. C. SUBMERSED IN SAID FILLER ADN CONDUCTIVELY INTERCONNECTING SAID PAIR OF TERMINAL ELEMENTS; OVERLOAD-RESPONSIVE FUSE-LINK-SEVERING MEANS OF A METAL HAVING A FUSING POINT IN THE ORDER OF 300 DEG. C. ARRANGED ADJACENT THE CENTER OF SAID FUSE LINK MEANS FOR SEVERING UPON FUSION THEREOF BY A METALLURGICAL REACTION THE CURRENT-PATH THROUGH SAID FUSE LINK MEANS, AND SOLDER JOINTS OF A METAL HAVING A FUSING POINT IN THE ORDER OF 300 DEG. C. FOR ESTABLISHING CURRENT PATHS OF LOW RESISTANCE BETWEEN SAID PAIR OF TERMINAL ELEMENTS AND SAID FUSE LINK MEANS.