Patents by Inventor Douglas J. Lionetti

Douglas J. Lionetti 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).

  • Variable resistance output motor controller
    Patent number: 4755730
    Abstract: In a thermostatic control system a solid state motor controller is provided by reproducing a potentiometer tracking with a CPU producing appropriate complimentary square wave signals having the duty cycle thereof proportional to a sensed temperature. The square wave signals are fed to circuits which are disposed across two output resistors and the effective resistance of the two resistors are varied in response to the duty cycle.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: July 5, 1988
    Assignee: Heat-Timer Corporation
    Inventors: David Sandelman, Douglas J. Lionetti, Daniel E. Shprecher