Patents by Inventor John J. McStay

John J. McStay 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).

  • Apparatus including a plurality of spaced transformers for locating short circuits in cables
    Patent number: 4110683
    Abstract: A cable fault locator for sensing faults such as short circuits in power cables. The apparatus includes a plurality of current transformers strategically located along said cable. Trigger circuits are connected to each of the current transformers for placing a resistor in series with a resistive element responsive to an abnormally high current flowing through that portion of the cable. By measuring the voltage drop across the resistive element, the location of the fault can be determined.
    Type: Grant
    Filed: July 8, 1977
    Date of Patent: August 29, 1978
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Robert L. Cason, John J. McStay