Heavy-duty time-delay fuse

Details Heavy-duty time-delay fuse Heavy-duty time-delay fuse

1985-01-25

1986-09-09

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337163, H01H 7120, H01H 8504

Patent

active

046111921

ABSTRACT:
A heavy-duty, time-delay fuse includes a pair of heat sinks having mutually facing, generally planar contact surfaces normally eutectically soldered to each other. A spring between the heat sinks is operative for urging the contact surfaces apart from each other in a direction generally perpendicular to the planes in which the contact surfaces lie in the event of an overload condition in which an overload electrical current causes a pair of fusible links to generate sufficient heat to melt the eutectically soldered interconnection between the contact surfaces after a predetermined time delay proportional to the amount of heat absorbed and dissipated by the heat sinks.

REFERENCES:
patent: 2577531 (1951-12-01), Laing
patent: 3046374 (1962-07-01), Wright
patent: 3291943 (1966-12-01), Kozacka

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