Time delay fuse

Details Time delay fuse Time delay fuse

1993-07-19

1994-09-06

Donovan, Lincoln

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337166, H01H 8504

Patent

active

053452100

ABSTRACT:
A time delay fuse and various subassembly components for that time delay fuse. The fuse includes a housing made of an insulating material. The housing encloses a short-circuit fusible element, preferably a copper or copper alloy strip having a plurality of slots. The housing also encloses one or more rigid meltable fusible elements, preferably a plurality of solder bars. A body of resilient, compressible insulating material has at least one passageway through which each of the time delay fusible elements extends. When the rigid meltable fusible elements melt, the circuit through the fuse opens. In addition, the passageway which surrounded the rigid meltable fusible elements collapses upon its melting. This provides protection against "arc-back."

REFERENCES:
patent: 4533895 (1985-08-01), Kowalik et al.
patent: 4636765 (1987-01-01), Krueger

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