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:
Sep. 02, 1980
Filed:
Sep. 08, 1978
John Rosa, Penn Hills, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
Tap changing apparatus including a plurality of electrical inductive windings, each having an intermediate tap which divides each winding into two sections with the voltage of one section being twice that of the other section. Gate-controlled electronic switches, disposed between the ends and the intermediate tap of each winding and each of two output terminals, are selectively triggered to form a conductive path which will cause either or both sectons of each tapped winding to be connected into a circuit so that it will aid, oppose or bypass the circuit. The switching sequences provide a full range of positive to negative output voltage magnitudes for each winding in incremental unit steps.