Abstract: A fuse assembly includes multiple fuse elements included in one single multiphase grooved shaft member thereof so that the fuse assembly may be used more than once as a safe electrical connection without the need to replace the whole fuse assembly each time a fuse element thereof is blown out. The fuse assembly can therefore be more convenient and practical in use and more economical and effective in cost.

Abstract: A method of manufacturing a chip fuse includes the steps of depositing a plurality of columns of electrically conductive metal film on a green, unfired ceramic substrate, and disposing a plurality of wire elements on the substrate over the film columns and perpendicular to the film columns. A cover of green, unfired ceramic is bonded to the substrate over the wire elements and film columns to form a laminate. The laminate is then die cut into individual fuses, which are then fired to cure the ceramic and form an intermetallic bond between the wire elements and the metal film. End termination coatings are then applied to the fuses to facilitate connecting the fuses in an electrical circuit. The invention relates to a chip fuse manufactured according to the method.

Abstract: A flip chip Surface Mount Fuse is disclosed. This fuse is comprised of a generally rectangular insulating member having a groove across its full length. A fuse element is placed inside the elongated groove and thick film metallizations are provided, through printing techniques, on opposite sides of the insulating member inside the groove to secure the fuse element and to provide termination to the insulating member. The opening of the groove is filled with an electrically insulating coating. The coating can be applied to form a time delay fuse or a fast acting fuse. Fuses can be manufactured in any desired size.

Abstract: A fuse for handling normal load currents substantially in excess of about 80 amps, the fuse comprising a metal portion formed of an integral piece of metal having outermost, spaced terminal-forming portions with bolt-anchoring holes therein and a fuse link-forming intermediate portion between the terminal-forming portions. The terminal-forming portions of the metal piece has a rectangular configuration having inner margins spaced from one another. The fuse link-forming portion of the metal piece has an S-shape with one face thereof being co-planar with one of the faces of the terminal-forming portions thereof. The thickness of the S-shaped fuse link is only a fraction of the thickness of the terminal thickness and has outermost legs respectively extending from the opposite sides of the innermost margins of the terminal-forming portions of the metal piece and a central link interconnecting the outermost legs.

Abstract: SMD fuses having consistent operating characteristics are fabricated by forming a repeating lithographic fuse element pattern on an insulative substrate, passivating the structure, bonding a protective glass plate over the passivation layer, slicing the assembly so formed, terminating the slices and cutting the slices into individual fuses. Fuses thus manufactured may be of any desired dimensions, including standard and non-standard chip sizes.

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 holder for an electric fuse is provided with a Hall-effect sensor arrangement which is integrally mounted in the fuse holder in close proximity to the current path through the holder. The Hall-effect sensor provides an output voltage responsive to the magnetic field resulting from the flow of current along the current path. The output from the Hall sensor is then processed to provide an indication of whether current is flowing through the fuse holder.

Abstract: A high voltage fuse comprised of a fuse element wrapped about a core, enclosed in a housing member, and surrounded by a granular quartz material is disclosed. The core has a plurality of cutouts along its outer surfaces having preselected dimensions relative to the width of a fuse element of such values as to assure that at least one cutout is interposed between adjacent turns of the fuse element. The interposed cutouts increase the creepage between the adjacent turns of the fuse element. The preselected dimensions of the cutouts relative to fuse-element width provide a single core that is capable of accommodating numerous types and different numbers of fuse elements. The core is also provided with a gas evolving material attached to the cutouts and separated from the fuse element by a predetermined amount to provide controlled release of arc-quenching gas, when arcing inside the fuse occurs.

Abstract: A thermal fuse apparatus comprising an insulating body and a fuse having a fuse body and a pair of connecting wires. The wires are inserted through passages in the insulating body, and the body includes recesses intersecting said passages so that a portion of the fuse wires are exposed exteriorly of the insulating body and excessible to counter contacts in an electrical appliance.

Abstract: In a glass-tube fuse comprising a glass tube, conductive caps on opposite ends of the tube and a fuse element enclosed in the tube and connected between the caps, the fuse element comprises a plurality of cores extending between the caps and at least one braiding strand of metallic material coiled alternately around the cores in opposite directions and connected at its ends to the end caps.

Abstract: A current limiting fuse of the general purpose type utilizes a mandrel which has a plurality of longitudinally oriented and radially spaced ceramic rods around which is wound a fuse element. Gas evolving clamps are disposed along the mandrel to hold the fuse element against the rods of the mandrel. This arrangement tends to maintain the spacing of any given portion of the wound fuse element relative to the other portions thereof. In addition, the gas evolving material evolves arc quenching gas in localized regions between the clamps and the rods during a fusing operation. The pressure of the gas as it is expelled from the localized regions tends to prevent the formation of fulgurites in the regions after the fusing operation has been completed. A fulgurite if formed would enhance the opportunity for a restrike of the arc which is undesirable.

Abstract: An insulating support for fusible elements in ribbon form having points of drastically reduced cross-sectional area which reduces the dimensional stability of the fusible elements to such an extent that they are not capable of supporting themselves. The support consists of a strip of electric insulating material arranged in spaced relation from, and parallel to, the fusible element. The strip has a plurality of arms projecting transversely from the former. Each of said plurality of arms supports the fusible element at a region situated between points of drastically reduced cross-sectional area thereof.

Abstract: In fuses embodying this invention each of the terminal elements has a port for the passage of fluid through the casing of the fuse during normal operation thereof, i.e. while the fuse is carrying current. A tubular fusible element conductively interconnects said port in each of said terminal elements. The fuse further includes a toroidal body of quartz sand filling the space between said casing and said tubular fusible element. The fusible element has perforations covered by annular structures of electric insulating material precluding said quartz sand from penetrating into said tubular fusible element during the normal operation of said fuse. The fuse is further provided with a pair of check valves which open during normal operation of said fuse and then allow the flow of fluid through said tubular fusible element and close on occurrence of a build-up of a predetermined amount of pressure inside of said tubular fusible element and then inhibit said flow of fluid.

Abstract: A ferrule fuse terminal clip with a pivoted U-shaped rejector member extending between its complementary curved clip legs. The pivotable rejector member facilitates the insertion and removal of a low rated-current cartridge fuse having a grooved ferrule end terminal and prevents the insertion of a non-grooved ferrule terminal of a cartridge fuse having a higher rated current. The rejector member is easily installed in a conventional ferrule fuse terminal clip and cannot be removed therefrom utilizing common tools without rendering the fuse terminal clip unusable.

Abstract: A fusible electric contactor having a plurality of cavities and a movable member having a path of movement into the cavities. A fuse assembly is removably inserted within the cavities to occupy a volume within the confines of the height, width, and length of the contactor.