Patents by Inventor Claude Henrion

Claude Henrion has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Switching equipment
    Patent number: 6023110
    Abstract: Switching equipment with a contactor (CE) and a circuit breaker (BR) located ahead of the contactor. For detection of welded-together contacts of the contactor, this is provided with means (SC) adapted, a certain time after an opening order to the contactor, to apply a voltage pulse to the operating coil (12) of the contactor and to compare the current response of the operating coil with a comparison level for forming a detection signal (s.sub.d), which is supplied to the circuit breaker. Upon detection of welded-together contacts, the detection signal triggers an opening of the circuit breaker for disconnection of the contactor.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: February 8, 2000
    Assignee: ABB Research Ltd.
    Inventors: Claude Henrion, Gunnar Johansson, Paul Stephansson, Harald Vefling