Electrical fuse with response indicator

Details Electrical fuse with response indicator Electrical fuse with response indicator

1983-02-07

1985-04-16

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337241, H01H 8530

Patent

active

045118760

ABSTRACT:
An elongated fuse housing includes a fusible wire longitudinally extended and coaxially mounted within a housing having end terminals. A spring indicator unit is secured to one end and includes a relatively large diameter loosely wound section forming a helical compression spring in combination with an integral, coaxial and tightly wound elongated indicator coil which extends axially of the spring. The spring/indicator unit is located within the housing with the coil spring held compressed by the fusible wire. The one end terminal includes an opening aligned with the wire-wound indicator coil. Disruption of the fusible wire releases the coil spring which expands within the housing to rapidly separate the fuse wire and simultaneously move the elongated wire-wound indicator coil through the opening, thereby indicating operation of the fuse.

REFERENCES:
patent: 2165636 (1939-07-01), Lemmon
patent: 4032877 (1977-06-01), McAlister

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