Patents by Inventor Richard H. Treacy

Richard H. Treacy 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).

  • System for supression of underdamped oscillations in ac power drawn by synchronous motors driving Ward-Leonard generators
    Patent number: 4494050
    Abstract: A method and apparatus for reducing oscillations in input electrical power to a Ward-Leonard drive system which is subject to variations in mechanical loading, the technique utilizing a notch filter in the feedback path to the dc generator, the notch filter being turned to match the resonant frequency of the synchronous motor.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: January 15, 1985
    Assignee: The Broken Hill Proprietary Company Limited
    Inventors: Noel R. Godfrey, Larry S. Parkes, Richard H. Treacy