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US 4,544,908 AGranted
Fuse with electro-negative gas interrupting means
AssigneeWestinghouse Electric Corp.
InventorsDonald D. Blewitt, Tapan K. Gupta
Life of this patent
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Abstract
There is provided by this invention a current limiting fuse having a fuse element wound about support means consisting of a non-stoichiometric oxide core that produces an electro-negative gas when heated by the melting fuse element. The generation of the electro-negative gas results in more rapid and efficient arc extinction.
Claims4
A fuse, comprising:
- (a) an insulating housing;
- (b) electrically conductive terminal means at each end of said insulating housing for sealing the ends thereof;
- (c) an elongated core traversing the entire length of the insulating housing;
- (d) a fuse element helically wound around and in continuous surface-to-surface contact with the core and electrically connected to the electrically conductive terminal means;
- and
- (e) the elongated core being composed of a non-stoichiometric oxide for evolving an arc extinguishing, electro-negative gas when heated by the combination of the heated fuse element and a resulting arc during current interruption.
3 more elements
Dependencies are inferred from the claim text.