Patents by Inventor Watson L. Courtney

Watson L. Courtney 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).

  • Refrigeration system with load balancing control for at least three centrifugal compressors
    Patent number: 4248054
    Abstract: An improved load balancing control circuit for at least three electric motor-driven centrifugal refrigerant compressors comprises a current transformer secondary 90', 91', 92' and a respective load resistor 93', 95', 97' in series to form the legs of a circuit in which the legs are connected in a delta, each leg having a shorting switch 110', 111', 112' connected across it, and a balancing resistance network including balancing resistors 94', 96', 98' are connected in a wye circuit with the delta circuit.
    Type: Grant
    Filed: February 14, 1979
    Date of Patent: February 3, 1981
    Assignee: Westinghouse Electric Corp.
    Inventors: Thomas E. Watson, Watson L. Courtney