Electric fuses with regions of reduced cross-sectional area

Details Electric fuses with regions of reduced cross-sectional area Electric fuses with regions of reduced cross-sectional area

1980-09-29

1982-08-24

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337159, 337278, H01H 8502

Patent

active

043463622

ABSTRACT:
An electric fuse according to this invention incorporates metal end caps and an elongate fuse element having regions of reduced cross-sectional area and extending in electrical series between the metal end caps, wherein the fuse incorporates within each end a respective gasket of an absorbent material impregnated with an arc-inhibiting substance. Materials which have been found to be particularly effective for the gaskets are asbestos and absorbent types of paper, including strawboard and cardboard, impregnated with an arc-inhibiting compound constituted, suitably, by sodium silicate.

REFERENCES:
patent: 1120226 (1914-12-01), Murray, Jr.
patent: 1502881 (1924-07-01), Sandin
patent: 2892061 (1959-06-01), Kozacka
patent: 3007020 (1961-10-01), Kozacka
patent: 4001748 (1977-01-01), Salzer
patent: 4158187 (1979-06-01), Perreault

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