The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 1980
Filed:
Sep. 20, 1978
Applicant:
Inventor:
Robert M Hruda, Horseheads, NY (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
2001 / ;
Abstract
A low voltage, high continuous current dc vacuum switch has at least three internal contacts, including an electrically floating center contact and two movable end contacts. The multiple contacts provide electrically serial multiple arc paths so that the switch is operable to interrupt an arc at a dc arc voltage above the arc voltages at which an arc could otherwise be interrupted for a single arc path. Arc shield means are provided to prevent deposition of contact material on predetermined switch envelope internal surfaces.