Patents by Inventor William M. Labadini

William M. Labadini 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).

  • Discharge lamp operating apparatus and method
    Patent number: 4523795
    Abstract: A process for operating a discharge lamp with an arc drop of not less than about 75% of a given service voltage includes the steps of series connecting a ballast and discharge lamp, coupling the series connected ballast and discharge lamp to a service voltage source and shunting the discharge lamp with a means for developing a pulse potential at or near the beginning of each half-cycle of the service voltage. Also, a series connected inductive ballast and discharge lamp are connected to a service voltage source and a non-linear dielectric element and preheat switching means each shunting the discharge lamp.
    Type: Grant
    Filed: August 10, 1984
    Date of Patent: June 18, 1985
    Assignee: GTE Products Corporation
    Inventors: Stephen G. Johnson, William M. Labadini
  • High intensity discharge (HID) lamp starting apparatus
    Patent number: 4513227
    Abstract: Apparatus for starting and operating a high intensity discharge lamp includes a pair of terminals connectible to an AC service voltage source and coupled by a ballast to an HID lamp with a series connected gated switch and a non-linear dielectric element shunting the HID lamp, a series connected resistor and capacitor shunting the HID lamp and a bidirectional switch coupling the junction of the resistor and capacitor to the gate electrode of the gated switch whereby a delayed pulse of increased magnitude is applied to an HID lamp.
    Type: Grant
    Filed: January 10, 1983
    Date of Patent: April 23, 1985
    Assignee: GTE Products Corporation
    Inventors: William M. Labadini, John A. Scholz
  • Method of pulsing incandescent lamp filaments
    Patent number: 4020383
    Abstract: One or more pulses of electrical energy are applied to the tungsten wire filament of an incandescent lamp in order to improve lamp performance.
    Type: Grant
    Filed: December 31, 1975
    Date of Patent: April 26, 1977
    Assignee: GTE Sylvania Incorporated
    Inventors: William M. Labadini, Edmund M. Passmore, Warren A. Anderson
  • Method of flashing tungsten filament
    Patent number: 4012659
    Abstract: The tungsten wire filament of an incandescent lamp is flashed to a recrystallized structure by applying pulses of electrical energy thereto.
    Type: Grant
    Filed: December 31, 1975
    Date of Patent: March 15, 1977
    Assignee: GTE Sylvania Incorporated
    Inventors: Edmund M. Passmore, George L. Duggan, Warren A. Anderson, William M. Labadini