Patents by Inventor Jack H. Hughes

Jack H. Hughes 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).

  • Multi-phase failure detector
    Patent number: 4393430
    Abstract: Phase line currents of a polyphase power supply are rectified and applied to a common input terminal of a sine wave detector circuit to sense the presence of a signal current that is injected from a low voltage DC source into any time gaps that are formed between phase currents only when one or more phase line failures occur. Failure of the DC source disables the detector circuit.
    Type: Grant
    Filed: June 8, 1981
    Date of Patent: July 12, 1983
    Inventor: Jack H. Hughes