Patents by Inventor James C. Widdis

James C. Widdis 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).

  • Aircraft engine electric start system without a separate exciter field inverter
    Patent number: 5546742
    Abstract: An aircraft engine start system eliminates the need of a separate exciter field inverter by rearranging the exciter field windings and by utilizing external AC power. The aircraft engine is started by external AC power and once the engine has started, the engine can supply power back to a variable frequency AC bus as well as back to a constant frequency AC bus through the start/generator converter mode.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: August 20, 1996
    Assignee: AlliedSignal Inc.
    Inventors: Sampat Shekhawat, John J. Tumpey, James C. Widdis