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:
Aug. 09, 1988
Filed:
Apr. 08, 1986
Applicant:
Inventors:
Henry F Cook, Penn Hills Twp., Allegheny County, PA (US);
James F Sutherland, Plum Boro, PA (US);
Ronald J Weisner, Plum Boro, PA (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G21C / ; G01R / ; G08B / ;
U.S. Cl.
CPC ...
376259 ; 376215 ; 3241 / ; 324 / ; 340644 ;
Abstract
A self-testing contact closure test circuit and method in which invalid logic states are artificially created in order to simulate a switch malfunction, and thus to determine whether the testing circuitry correctly identifies the invalid state. The system is designed to be used with switches such as those incorporating form 'C' arrangements having two pairs of contacts which under normal circumstances are in opposite states.