Patents by Inventor Louis L. Daigle

Louis L. Daigle 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).

  • Microprocessor controlled multifrequency AC converter
    Patent number: 4481456
    Abstract: An AC converter changes the frequency of an incoming voltage waveform to operate an induction motor driving a ventilation system at one or several different speeds. A program followed by a microprocessor utilizes the phase-to-phase incoming voltage waveform in a step-by-step sequence to generate control signals for the switches in a switching matrix. A full-speed subroutine, a three-quarter speed subroutine and a half-speed subroutine are disclosed for the microprocessor.
    Type: Grant
    Filed: January 24, 1983
    Date of Patent: November 6, 1984
    Assignee: United Technologies Corporation
    Inventors: Russell G. Meyerand, Jr., Louis L. Daigle, Donald C. Paine