Method of manufacturing a fuse with an envelope of non-porous ri

Details Method of manufacturing a fuse with an envelope of non-porous ri Method of manufacturing a fuse with an envelope of non-porous ri

1988-11-09

1990-01-02

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

29846, 29613, 164 91, 164 98, H01C 1702

Patent

active

048903809

ABSTRACT:
A high power current-limiting fuse comprises a cylindrical envelope which closely surrounds a metallic fusible element in the form of a wire or ribbon. The cylindrical envelope is made of high density rigid ceramic such as Alumina of formula Al.sub.2 O.sub.3, and Beryllium oxide of formula BeO. The two ends of the envelope are metalized to form two terminals respectively connected to the ends of the fusible element, whereby the current-limiting fuse is connectable to an electric circuit to be protected through the two so formed terminals. A sheath of fiberglass or ceramic can be mounted around the cylindrical envelope so as to increase the mechanical rigidity of the current-limiting fuse.

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A. J. Marriage and B. McIntosh: "High Speed Thick Film Fuses", Adelaide, Australia, Hybrid Circuits, No. 9, May, 1985.

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