Patents by Inventor Denver W. Smith

Denver W. Smith 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).

  • Method of testing the windings and insulation system of a motor by applying the test voltage before completing a path to ground
    Patent number: 4340853
    Abstract: An electrically surge protected motor having a submersible housing (10) can be manufactured and tested for insulation weaknesses by first assembling the motor components in the housing (10) without completing a path to ground therethrough. Then the windings (11, 12) of the motor may be subjected to a voltage surge greater than the voltage magnitude at which the motor is to be surge protected. After completion of the test, a path to ground through an impedance device (17) which establishes the voltage magnitude at which the motor is to be protected may be completed. Several alternative grounding devices (23, 24, 25, 26 or 28) may be provided externally of the housing (10).
    Type: Grant
    Filed: October 17, 1979
    Date of Patent: July 20, 1982
    Assignee: McNeil Corporation
    Inventors: John L. Braun, Denver W. Smith, William J. Ekey