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:
Feb. 10, 1976
Filed:
May. 21, 1974
Donald M Demarest, Wallingford, PA (US);
General Electric Company, Philadelphia, PA (US);
Abstract
An alternating current static switch comprising two branch circuits connected in inverse parallel circuit relation and having at least three semiconductor devices in series in each branch circuit has anode-to-cathode cross connections between oppositely poled devices at each voltage level. A single gate pulse transformer having secondary windings equal in number to the number of cross connections supplies positive gate current pulses to all semiconductor devices in both branch circuits once each half cycle of impressed circuit voltage. Each secondary winding has its negative terminal connected to one cross connection and its positive terminal connected to the gates of all devices having cathodes connected to the same cross connection.