Patents by Inventor Leonard R. Guarnera

Leonard R. Guarnera 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).

  • High frequency ballast-ignition system for discharge lamps
    Patent number: 4484108
    Abstract: A high frequency oscillator-inverter ballast-ignition system for a discharge lamp includes a leakage reactance transformer that forms a part of the oscillator-inverter and also couples same to the discharge lamp. An impedance element electrically couples the primary and secondary windings of the transformer in additive phase to provide more reliable lamp ignition over a wider range of voltage and temperature than was heretofore possible. The preheat time period of the lamp cathodes can be better controlled by a proper choice of the transformer heater winding turns.
    Type: Grant
    Filed: August 2, 1982
    Date of Patent: November 20, 1984
    Assignee: North American Philips Corporation
    Inventors: Edward H. Stupp, Mark W. Fellows, Leonard R. Guarnera