Fuse with helical fuse element

Details Fuse with helical fuse element Fuse with helical fuse element

1978-06-21

1981-02-24

Harris, George

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337252, 337290, H01H 8504

Patent

active

042530806

ABSTRACT:
A current limiting fuse has a helically coiled fuse element of ribbon-like material extending within a tubular casing between metallic end caps. The ribbon-like material is edge on to the axis of the helix for permitting a greater length of fuse element than if the ribbon-like material had its flat side towards the axis. In a preferred form, the ribbon-like material has ripples or indentations across it with the ripples having a greater displacement at the edge of the ribbon-like fuse element nearer the axis.

REFERENCES:
patent: 4001748 (1977-01-01), Salzer
patent: 4020441 (1977-04-01), Jacobs, Jr.
patent: 4117441 (1978-09-01), Wycklendt

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