Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
David Scott S. Maclennan0
Reginald Albert A. Drake0
Date of Patent
September 22, 2009
0Patent Application Number
118448790
Date Filed
August 24, 2007
0Patent Primary Examiner
Patent abstract
A controller for a vacuum contactor or the like measures barometric pressure and provides a short impedance characterizing pulse to the coils of the vacuum contactor coils to assess proper operating conditions of the coils and to check for coil or sensor faults.
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