Patents by Inventor Murray Robert Ellsworth

Murray Robert Ellsworth 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).

  • Bypass circuit to prevent arcing in a switching device
    Patent number: 7342754
    Abstract: A device is provided for preventing arcing between contacts of a switching device as the contacts of the switching device are opened. The device includes a coil suppression circuit connected in parallel with the coil. The coil suppression circuit dissipates the energy stored in the coil in response to the de-energization of the coil. A first solid state switch has a gate operatively connected to the coil suppression circuit and is connected in parallel with the contacts. The first solid state switch is movable between an open position preventing the flow of current therethrough and a closed position in response to the dissipation of energy by the coil suppression circuit.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: March 11, 2008
    Assignee: Eaton Corporation
    Inventors: Robin Fitzgerald, legal representative, Sean Tillman Sande, Murray Robert Ellsworth, Edward Aloysius Fitzgerald