Holder for a tubular safety fuse

Details Holder for a tubular safety fuse Holder for a tubular safety fuse

1990-09-12

1991-06-11

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337188, 439622, H01H 8502, H01H 8546, H01R 1368

Patent

active

050235885

ABSTRACT:
A holder for a tubular safety fuse providing an insulating ring that surrounds the safety fuse which prevents short circuits during removal of the fuse. It can occur that when the safety fuse blows, an axially displaceable contact piece which is wired to a first terminal welds to a back contact cap of the safety fuse. When the safety fuse is thereafter pulled, there is a risk that the back contact cap, adhering to the displaceable contact piece, will come into electrical contact with a middle contact which is wired to a separate terminal pin. If the first terminal pin and the separate terminal pin are at different electrical potentials a sparking can result. The insulating ring prevents this electrical contact between the back contact cap and the middle contact.

REFERENCES:
patent: 3659252 (1972-04-01), Brown
patent: 4762509 (1988-08-01), Schaefer

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