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:
May. 15, 1979
Filed:
Nov. 25, 1977
Thomas A Fancy, Westminster, MA (US);
General Electric Company, Schenectady, NY (US);
Abstract
The reliability of any system can be enhanced by redundancy. In a turbomachine control system, increased reliability through redundancy is particularly desirable in view of the consequences of an unscheduled shutdown. One area of a turbomachine controls system which is particularly suited to redundant modeling is the speed control circuits. Speed pick-up probes may be subject to severe duty and are critical to the speed control of a turbomachine since they provide the speed feedback signal. The present invention is a solid state circuit which provides an output signal even if either one of two redundant speed feedback probes should fail. This circuit also allows probe replacement while the turbomachine remains in service.