Patents by Inventor Edward S. Andrejko

Edward S. Andrejko 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).

  • Electronic speed error signal processing circuit
    Patent number: 4211931
    Abstract: An electronic speed error signal processing circuit is provided which attenuates rapid fluctuations ocurring in the speed error signal used to control the fluid inlet valve of a fluid driven prime mover. Such fluctuations contribute greatly to valve wear by causing "valve flutter," the continual rapid opening and closing of the inlet valve as the speed control system of a prime mover instantaneously responds to any small speed error signal fluctuation. By attenuating these rapid fluctuations, valve flutter is reduced.
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: July 8, 1980
    Assignee: General Electric Company
    Inventors: Charles W. Eichelberger, Edward S. Andrejko