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. 07, 1987
Filed:
Jul. 12, 1985
William W Billings, Lima, OH (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A solid state power controller including a switching device which has a first impedance in an ON state and a second, higher impedance in an OFF state is provided with a leakage current shunt circuit. The solid state power controller includes a control circuit for turning the switching device on and off. This control circuit is operatively associated with a shunt circuit operating means which turns the shunt circuit on following a transition of the switching device from an ON state to an OFF state and which renders the shunt circuit inoperative prior to a transition of the switching device from an OFF state to an ON state. The shunt circuit thereby acts to clamp the voltage appearing at a pair of solid state power controller load output terminals.