Low voltage cartridge fuse design

Details Low voltage cartridge fuse design Low voltage cartridge fuse design

H - Electricity

01

H

306/138

H01H 85/36 (2006.01) H01H 85/055 (2006.01) H01H 85/18 (2006.01)

Patent

CA 1155154

LOW VOLTAGE CARTRIDGE FUSE DESIGN Abstract of Disclosure This invention relates to electric fuses meeting the requirements of Underwriter's RKl classification. It includes a high-current interrupter in the form of a fusible element having serially arranged points of reduced cross-section and a low-current interrupter in the form of a plunger soldered to the high-current interrupter. The plunger is spring biased, and when the solder joint softens, the plunger separates under the action of the spring from the fusible element leaving a large gap between them. The separation of the plunger from the fusible element is allowed to be particularly large on account of the fact that the plunger may be allowed to move into a special fuse cap, known as a cap having a rejection feature as described, for instance, in U.S. Patent 2, 943, 295 to V. N. Stewart; 06/28/1960 for REJECTION TYPE FUSE CLIP and in many other patents. -1-

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