Abstract: A fuse including a fuse body, a fusible element disposed within the fuse body providing an electrically conductive pathway extending between a first end of the fuse body and a second end of the fuse body, and a heat shield disposed within the fuse body intermediate an interior surface of the fuse body and an exterior surface of the fuse body for mitigating heat flow therebetween.

Abstract: Cooling rings of resilient thermally conductive material are installed over a current limiting fuse prior to insertion in a canister housing. The cooling rings provide a heat conduction path from the fuse to the canister wall, thereby reducing heat build up within the canister. The cooling rings are provided with recesses to reduce pressure build-up during fuse insertion in a canister.

Abstract: A sub-miniature fuse for electrical protection includes an assembly of an outer tube and an inner tube made of insulating material. The inner tube has electrodes and a fusible metal link sputtered onto its outer surface. The assembly of inner and outer tubes is terminated electrically at its ends with axial leads, or with surface mounting pads, or with radial leads.

Abstract: A protective fuse assembly for a current limiting fuse of the type, including a dielectric housing enclosing the fuse, an end cap secured to the lower end of the fuse by a pyrotechnic charge assembly, the end cap supporting the housing on the fuse, an end cap mounted on the upper end of the fuse for centering the housing on the fuse, and an electrically conductive wire connecting the charge to the fuse whereby the charge is detonated when the fuse senses a fault current to release the lower end cap from the fuse so that the housing drops to the bottom of the fuse.

Abstract: An electrical component, particularly a fuse for a surface-mount component, is formed by sputtering an electrical conductor onto a square tube, sleeving the tube into an outer tube, filling the assembly with a room-temperature vulcanizing silicone sealant, cutting the assembly into segments, and metallizing the ends of each segment.

Abstract: A sub-miniature fuse for electrical protection includes an assembly of an outer tube and an inner tube made of insulating material. The inner tube has electrodes and a fusible metal link sputtered onto its outer surface. The assembly of inner and outer tubes is terminated electrically at its ends with axial leads, or with surface mounting pads, or with radial leads.

Abstract: A sub-miniature fuse for electrical protection includes an assembly of an outer tube and an inner tube made of insulating material. The inner tube has electrodes and a fusible metal link sputtered onto its outer surface. The assembly of inner and outer tubes is terminated electrically at its ends with axial leads, or with surface mounting pads, or with radial leads.

Abstract: A miniature cartridge-type fuse comprises a sub-assembly of an inner insulating housing made of a transparent glass or glass-like material which cannot withstand the forces of a short circuit overload, and end cap terminals at the ends of the housing. A transparent encapsulating body is preferably molded immovably around the inner housing and covers, seals and physically interconnects the exposed exterior surfaces of the inner housing and terminals. The encapsulating body prevents the hazardous destruction of the fuse under all overload conditions and enables the fuse element to be seen through the encapsulation body and inner housing.

Abstract: A pressure- and weather-resistant fuse tube having fiberglass reinforcement which cannot interfere with arc-extinguishment and which does not require an insert or liner of arc-extinguishing material. The fuse tube is molded from a thermosetting material which includes an effective amount of an arc-extinguishing material. The fuse tube includes an inner bore-defining portion and an outer weather-resistant portion which are simultaneously molded along an interface at which is located a layer of porous fiberglass cloth, or filament. The fiberglass is sufficiently porous to permit the material of both portions to pass through and thoroughly impregnate it, thereby locking both portions to each other and to the fiberglass which is located well away from the bore thereof.

Abstract: Pad-mounted double-fused switchgear especially adapted for use in underground distribution systems is provided which includes an oil tank having manually operable vacuum switch apparatus therein in conjunction with closely adjacent, series-connected, combination current limiting fuse-expulsion link protective fuse structure for maintaining the required momentary electrical rating of the overall switch apparatus notwithstanding of a relatively low-rated switch element, and for providing thermal protection for the switchgear. Double-fusing within the oil tank also serves to reduce electrical duty on upstream and downstream equipment, increases the interruption rating of the switchgear, and enhances overall system coordination.