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:
Apr. 12, 1977
Filed:
Feb. 23, 1976
Thomas H Schwalenstocker, Indiana Township, Glenshaw, PA (US);
William E Zitelli, Middletown Township, Media both of, PA (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
A position control system that interfaces turbine control systems with an electro-hydraulic actuator for inlet valves, is disclosed. The system includes a feedback signal generating means that eliminates the effect of differences in ground potentials which would otherwise cause undesirable valve movement and also a proportional plus integral controller that has independent porportionality and reset parameter adjustment. The system also includes a position characterizer that generates independent line segments in the feedback loop, and which provides for selecting monotonically decreasing slopes, or slopes with inflection discontinuities.