Fuse having helically wound fusible element and support therefor

Details Fuse having helically wound fusible element and support therefor Fuse having helically wound fusible element and support therefor

1978-04-12

1980-01-08

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337158, 337279, H01H 8538

Patent

active

041830040

ABSTRACT:
An electric fuse has rod supports for the helically wound fusible element which are of a laminate of glass cloth and a synthetic resin. This is a material which is slightly gas evolving. The rods have inserts of a material which is highly gas evolving, and they provide a substantial spacing between the path of the fusible element--and the arc path--and the surface of the rod supports for it. The limited gas evolving capacity of the rods combined with the large gas evolving capacity of the inserts and combined with the spacing between the arc path and the surface of the rods allows proper operation of the fuse in the absence of any ceramic insulators or ceramic supports for the fusible element.

REFERENCES:
patent: 3573699 (1971-04-01), Salzer
patent: 3881161 (1975-04-01), Kozacka
patent: 3925745 (1975-12-01), Blewitt
patent: 4093932 (1978-06-01), Kozacka

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