Patents by Inventor Walter G. Steneck

Walter G. Steneck 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 oscillator-inverter ballast circuit for discharge lamps
    Patent number: 4701671
    Abstract: A current fed high frequency oscillator-inverter ballast circuit includes a parallel resonant tank circuit for driving a pair of series connected discharge lamps via a series ballast capacitor. A regenerative power supply switches on when a fluctuating main DC supply voltage drops below a given level thereby providing a constant level auxiliary DC supply voltage to the oscillator inverter to maintain oscillation and lamp operation. When the main DC supply voltage exceeds said given level, the regenerative power supply switches out. The oscillation frequency is f.sub.2 during operation of the main supply and automatically switches to a frequency f.sub.1 when the regenerative power supply takes over. The frequency shift is automatic during each half cycle of a 60 Hz AC supply and is in a direction so as to maintain lamp current relatively constant.
    Type: Grant
    Filed: August 6, 1986
    Date of Patent: October 20, 1987
    Assignee: North American Philips Corporation
    Inventors: Edward H. Stupp, Mark W. Fellows, Walter G. Steneck
  • High-frequency oscillator-inverter ballast circuit for discharge lamps
    Patent number: 4560908
    Abstract: A current fed high frequency oscillator-inverter ballast circuit includes a parallel resonant tank circuit for driving a pair of series connected discharge lamps via a series ballast capacitor. A regenerative power supply switches on when a fluctuating main DC supply voltage drops below a given level thereby providing a constant level auxiliary DC supply voltage to the oscillator inverter to maintain oscillation and lamp operation. When the main DC supply voltage exceeds said given level, the regenerative power supply switches out. The oscillation frequency is f.sub.2 during operation of the main supply and automatically switches to a frequency f.sub.1 when the regenerative power supply takes over. The frequency shift is automatic during each half cycle of a 60 Hz AC supply and is in a direction so as to maintain lamp current relatively constant.
    Type: Grant
    Filed: May 27, 1982
    Date of Patent: December 24, 1985
    Assignee: North American Philips Corporation
    Inventors: Edward H. Stupp, Mark W. Fellows, Walter G. Steneck
  • Magnetic transformer switch and combination thereof with a discharge lamp
    Patent number: 4453109
    Abstract: A magnetic transformer switch which switches its primary flux path upon conduction in its secondary and the combination thereof with a fluorescent lamp in which the heater current is reduced upon lamp ignition by reason of the current in the heater winding in the secondary being reduced upon the primary flux path being switched. A unique construction minimizes both electromagnetic interference and induction losses.
    Type: Grant
    Filed: May 27, 1982
    Date of Patent: June 5, 1984
    Assignee: North American Philips Corporation
    Inventors: Edward H. Stupp, Mark W. Fellows, Walter G. Steneck, Vincent J. Spataro