Method of making miniature plug-in fuses of different fuse ratings

摘要

A method is disclosed for making a plug-in fuse assembly like that disclosed and claimed in U.S. Pat. No. 3,909,767, granted Sept. 30, 1975 for Miniature Plug-In Fuse and having different desired fuse ratings. The method comprises the steps of providing a blank of fuse metal which is initially provided throughout its length with a continuous central portion of reduced thickness having a fixed thickness dimension for making fuses of a variety of fuse ratings, and blanking the blank of fuse metal to contain a pair of laterally spaced coplanar terminal forming blade portions which are interconnected by a transverse web of reduced thickness having a fixed thickness dimension, coplanar current carrying extensions thereof and an interconnecting fuse-forming link portion of reduced thickness having a fixed thickness dimension located in a coplanar platelike body of a plug-in fuse element. The interconnecting fuse-forming link portion of fixed reduced thickness dimension, provided by the blanking of the blank of fuse metal, is arranged in a desired location and is provided with a desired configuration, including width and length dimensions, to provide the desired fuse rating. The method also includes inserting over said blanked blank a synthetic plastic housing by way of an opening at the inwardly facing side thereof with the current carrying extensions of the blank and the interconnecting fuse- forming link portion of fixed reduced thickness dimension within the housing and with the pair of terminal blade portions of the blank, which are interconnected by the transverse web of fixed reduced thickness dimension, extending outwardly from the housing element through the opening therein, securing said blank in the synthetic plastic housing, and blanking the exposed transverse web of fixed reduced thickness dimension interconnecting the terminal blade portions to complete the formation of the coplanar plate-like body having a pair of aterally spaced coplanar terminal portions and of the plug-in fuse assembly.