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:
Aug. 24, 2010
Filed:
Nov. 09, 2006
Applicant:
Jolyon Michael Crane, Christchurch, GB;
Inventor:
Jolyon Michael Crane, Christchurch, GB;
Assignee:
P G Drives Technology Limited, Christchurch, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H 35/00 (2006.01); H01H 83/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Electrical switch circuitry including a relay with contacts and a transistor. A control circuit switches the transistor ON in response to a voltage difference across the relay contacts reaching a predetermined value, such that in use, electrical current is caused to flow through the transistor while the electrical contacts of the relay are closing or opening. This reduces electrical arcing across the contacts of the relay.