Electric fuse with sealed indicator

Details Electric fuse with sealed indicator Electric fuse with sealed indicator

1976-10-26

1977-11-29

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337248, H01H 8530

Patent

active

040607860

ABSTRACT:
A current-limiting power fuse has an indicator mechanism which includes a conductive support cup mounted on one terminal cap and containing an indicator button disposed telescopingly in the cup with an outer hermetically closed end. A spring inside the button biases the outer end face away from the support cup. The outer end of the button is held in place by a fusible indicator wire.
The button is a bellows with the inner end hermetically sealed to the bottom of the support cup to isolate the fusible indicator wire from ambient gas.

REFERENCES:
patent: 3636491 (1972-01-01), Cameron
patent: 3895338 (1975-07-01), Gray et al.

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