Composite fusible element for electric current-limiting fuses

Details Composite fusible element for electric current-limiting fuses Composite fusible element for electric current-limiting fuses

1980-07-31

1982-02-09

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337161, 337162, 337295, H01H 8508, H01H 8510

Patent

active

043152350

ABSTRACT:
A composite fusible element of silver and copper includes an inlay of silver and a base formed by a thicker strip of copper than the inlay of silver. The strip of copper is severed by a pair of juxtaposed incisions, so that the entire current is carried at this particular point only by the strip of silver. Moreover, the incisions penetrate into the strip of silver, producing in it a point of reduced cross-section. The strip of copper is preferably provided with a concave groove. The strip of silver is preferably convex and fits into the concave groove of the strip of copper. The composite fusible element may include several parallel strips of silver in a joint base of copper.

REFERENCES:
patent: 2781434 (1957-02-01), Swain
patent: 2809257 (1957-10-01), Swain
patent: 3543209 (1970-11-01), Kozacka

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