Patents by Inventor Robert C. Kilpatrick

Robert C. Kilpatrick 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).

  • Method and apparatus for saving energy
    Patent number: 4156166
    Abstract: A method and apparatus for regulating the output flux generated by a lamp with the degeneration of the voltage from a power source such as a battery. The regulating circuit maintains a constant luminous flux output from a lamp over a substantial range of voltages by switching the voltage to the lamp on and off at a preselected and controlled duty cycle. The duty cycle varies with the variations in the lamp electrical operating parameter provided to the regulating circuit. The regulating circuit permits the useful life of a power source to be substantially increased before requiring replacement.
    Type: Grant
    Filed: December 20, 1976
    Date of Patent: May 22, 1979
    Assignee: Royal Industries, Inc.
    Inventors: Haskell Shapiro, Robert C. Kilpatrick