Littelfuse, Inc.

Jon McAlear

Robert J Tait

An improved electrical fuse comprises an oppositely open ended insulating housing in the form of a cylindrical sleeve having a fuse element disposed therein. A pair of cup-shaped end caps close the ends of the sleeve and are electrically and physically connected to the ends of said fuse element. An external lead is connected to each of the end caps and extends outwardly therefrom. A quantity of solder in each end cap is fused to make electrical contact between the end cap and the adjacent end of the fuse element. An adherent insulating coating layer is disposed over the sleeve, end caps and leads to cover, seal, and physically interconnect the exposed exterior surfaces of said sleeve, said pair of end cap means and a portion of each lead adjacent to said pair of end cap means.

Electrical fuse

An improved electrical fuse having axial leads and comprising a fuse wire in a cylindrical sleeve supported at its ends by lead carrying end caps is coated over the length of the fuse body by an adherent insulating layer (FIG. 4). Improved humidity resistance and mechanical strength are achieved. The necessity for plating the end caps to achieve corrosion resistance is eliminated. Control of coating thickness produces a substantially moderated profile and facilitates application of color coding bands to the coated fuse.

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Barrington Trails, IL, United States of America

Jon McAlear