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US 4,553,007 AGranted
Arc resistant vapor condensing shield for vacuum-type circuit interrupter
AssigneeWestinghouse Electric Corp.
InventorPaul O. Wayland
Life of this patent
Estimating the term…
Abstract
A vacuum-type circuit interrupter is provided having a vapor condensing shield which at least in the arcing area is comprised of the same two metallic components as the separable metallic electrical contacts.
Claims6
A vacuum-type circuit interrupter including in combination:
- (a) means defining an evacuated envelope;
- (b) a pair of two-component metallic electrical contacts disposed within the evacuated envelope, said contacts being separable to establish arcing;
- (c) a vapor condensing shield disposed within said evacuated envelope to prevent the deposition of metal particles, emitting from the arcing region, on the envelope and to prevent heat flux from damaging the envelope;
- and
- (d) at least that portion of the vapor condensing shield adjacent to said separable contacts and within the arcing area being comprised of the same two metallic components as the separable electrical contacts.
2 more elements
Dependencies are inferred from the claim text.