Patents by Inventor Winston D. Couwenberg

Winston D. Couwenberg 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 electronic ballast
    Patent number: 6686703
    Abstract: An improved high frequency ballast is disclosed. The high frequency ballast establishes a lamp current for a gas discharge lamp during a starting operation of the gas discharge lamp wherein an operating ampere level of the lamp current facilitates a substantial achievement by the gas discharge lamp of a color specification associated with the gas discharge lamp. Thereafter, during a stable operation of the gas discharge lamp, the high frequency ballast applies a frequency modulation to an operating frequency of the lamp current and/or an amplitude modulation of the lamp current.
    Type: Grant
    Filed: January 10, 2002
    Date of Patent: February 3, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Robert A. Erhardt, Oscar J. Deurloo, Jerzy Janczak, Hendrik A. Van Esveld, Winston D. Couwenberg, Ronald H. Van Der Voort
  • High frequency electronic ballast
    Publication number: 20030127993
    Abstract: An improved high frequency ballast is disclosed. The high frequency ballast establishes a lamp current for a gas discharge lamp during a starting operation of the gas discharge lamp wherein an operating ampere level of the lamp current facilitates a substantial achievement by the gas discharge lamp of a color specification associated with the gas discharge lamp. Thereafter, during a stable operation of the gas discharge lamp, the high frequency ballast applies a frequency modulation to an operating frequency of the lamp current and/or an amplitude modulation of the lamp current.
    Type: Application
    Filed: January 10, 2002
    Publication date: July 10, 2003
    Inventors: Robert A. Erhardt, Oscar J. Deurloo, Jerzy Janczak, Hendrik A. Van Esveld, Winston D. Couwenberg, Ronald H. Van Der Voort
  • Low-pressure mercury vapor discharge lamp
    Patent number: 4546285
    Abstract: Low-pressure mercury vapor discharge lamp having a curved discharge vessel in which a mercury discharge is maintained between the electrodes and in which furthermore an amlagam is provided to control the mercury vapor pressure, the discharge vessel containing a rare gas mixture which contains at least 50 at.% krypton at a pressure of 130 to 520 Pa.
    Type: Grant
    Filed: April 8, 1985
    Date of Patent: October 8, 1985
    Assignee: U.S. Philips Corporation
    Inventors: Jean J. Heuvelmans, Winston D. Couwenberg, Franciscus A. S. Ligthart
  • Low-pressure mercury vapor discharge lamp
    Patent number: 4277720
    Abstract: Low-pressure mercury vapor discharge lamp having a relatively small discharge vessel containing as the buffer gas a rare gas mixture which is rich in helium, but which also comprises a quantity of one or more heavier rare gases, preferably crypton. The heavier rare gases increase the arc voltage.
    Type: Grant
    Filed: November 15, 1979
    Date of Patent: July 7, 1981
    Assignee: U.S. Philips Corporation
    Inventors: Winston D. Couwenberg, Albert Bouwknegt, Franciscus A. S. Ligthart, Jean J. Heuvelmans
  • Low-pressure mercury vapor discharge lamp
    Patent number: 4237401
    Abstract: Low-pressure mercury vapor discharge lamp having a discharge vessel comprising at least two thermally emitting electrodes as well as mercury and a rare gas or a combination of rare gases, the discharge vessel being provided with a glass wall permeable to the ultra-violet radiation generated in the mercury discharge, at least a halide of mercury being present in the discharge vessel.
    Type: Grant
    Filed: October 18, 1978
    Date of Patent: December 2, 1980
    Assignee: U.S. Philips Corporation
    Inventor: Winston D. Couwenberg
  • Low-pressure mercury vapor discharge lamp
    Patent number: 4208604
    Abstract: Low-pressure mercury vapor discharge lamp comprising an U-shaped discharge tube of which at least the legs are accommodated in recesses of a cylindrical body.
    Type: Grant
    Filed: August 18, 1978
    Date of Patent: June 17, 1980
    Assignee: U.S. Philips Corporation
    Inventor: Winston D. Couwenberg