Fusible element for electric fuses and electric fuse including t

Details Fusible element for electric fuses and electric fuse including t Fusible element for electric fuses and electric fuse including t

1980-08-12

1983-01-04

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337159, 337296, H01H 8512

Patent

active

043674518

ABSTRACT:
A fusible element for electric fuses including a core or layer of copper, an outer layer of silver plating, and an M-effect overlay on the silver layer of a low fusing point metal, e.g. tin, capable of severing the current path through the plating of silver and the core of copper by a metal diffusion process.
The M-effect overlay is arranged in spaced relation in regard to the point of the fusible element where the highest temperature prevails to maximize the temperature difference, or temperature gradient, between the M-effect overlay and the hottest point of the fusible element when the latter is carrying current.

REFERENCES:
patent: 2809257 (1957-10-01), Swain
patent: 3386062 (1968-05-01), Kozacka et al.
patent: 3543209 (1970-11-01), Kozacka

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