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. 07, 1991
Filed:
Nov. 29, 1989
Benjamin T Humphries, Orlando, FL (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
Method and apparatus for measuring the tightness of generator stator slot wedges and ripple springs with the rotor still in place. A wedge block having a hydraulic cylinder disposed therein is installed within the upper of a pair of parallel grooves in the stator slot. The hydraulic cylinder is activated to press down on a load plate, which in turn contacts a slot wedge within the other pair of parallel grooves. This is turn compresses the ripple spring between the slot wedge and the stator windings. A load cell measures the force required to compress the ripple spring, while four linear variable differential transformers measure the amount of displacement of the slot wedge. These two measurements are then used to derive a measurement for the tightness of the slot wedge and the ripple spring.