Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
August 24, 2010
Patent Application Number
11558017
Date Filed
November 9, 2006
Patent Primary Examiner
Patent 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.
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