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:
Jun. 21, 1988
Filed:
May. 09, 1985
William L Miller, West Deer Township, Allegheny County, PA (US);
James F Sutherland, Plum Boro, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
Redundant trip logic microprocessors produce partial trip signals which are voted on by a pair of voters at the power interface to the actuated devices. The logic implemented by each trip logic processor is straight-forward and can be designed for each individual plant. Also included is an automatic tester and testing method which can confirm the accuracy of A/D converters, digital inputs, check the trip points of bistable, verify all the trip and voting logic, and measure the time response of each channel. The test subsystem uses a microcomputer to control the isolation of the analog field sensor signals and digital contact signals from the analog and digital inputs, control the generation and/or injection of various combinations of reference and test signals, and monitor the response of the trip logic processors and voter to the test signals.