Patents by Inventor Fransiscus Arnoldus Vermeulen

Fransiscus Arnoldus Vermeulen 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).

  • Method and device for driving a metal halide lamp
    Patent number: 7432665
    Abstract: A method for driving a lamp is described includes generating a light controlling DC electric field E with a desired direction and a desired strength inside the lamp such as to obtain a desirable ion distribution inside the lamp. The lamp is supplied with a commutating current with a DC component, having a constant current intensity and a duty cycle differing from 50%. By setting the duty cycle, it is possible to set a certain average value of the lamp current, allowing the efficacy and/or color temperature of the lamp to be influenced.
    Type: Grant
    Filed: April 22, 2003
    Date of Patent: October 7, 2008
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Johannes Jacobus Franciscus Geijtenbeek, Johan Leopold Victorina Hendrix, Fransiscus Arnoldus Vermeulen
  • Gas discharge lamp
    Patent number: 7233109
    Abstract: A metal halide lamp (101) is described, the lamp being designed such that, when the lamp is operative in a vertical orientation, the location of the salt pool is close to the top of the discharge chamber (5). In an embodiment, the coldest spot is close to the top of the discharge chamber. Means are provided enabling more heat to be supplied to the bottom part than to the upper part. In a lamp assembly (10), comprising a lamp (101) arranged inside a bulb (11), additional heat generating means (90) may comprise a radiation coil (91).
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: June 19, 2007
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Johannes Jacobus Franciscus Geijtenbeek, Fransiscus Arnoldus Vermeulen
  • Metal halide lamp
    Patent number: 6841938
    Abstract: Metal halide lamps have a discharge vessel operable at a high coldest spot temperature. The discharge vessel encloses a discharge space comprising an ionizable gas filling and, in addition to Hg, also an alkali iodide of Na of Li or a combination of both. According to the invention, the filling also comprises TbI3 or GdI3 or a combination thereof.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: January 11, 2005
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Josephus Christiaan Maria Hendricx, Joseph Leonardus Gregorius Suijker, Antonius Arnoldus Duisters, Fransiscus Arnoldus Vermeulen
  • Metal halide lamp
    Publication number: 20040095071
    Abstract: The invention relates to metal halide lamps having a discharge vessel with a ceramic wall. The discharge vessel encloses a discharge space comprising an ionizable gas filling and, in addition to Hg, also an alkali iodide of Na or Li or a combination of both. According to the invention, the filling also comprises TbI3 or GdI3 or a combination thereof.
    Type: Application
    Filed: June 30, 2003
    Publication date: May 20, 2004
    Inventors: Josephus Christiaan Maria Hendricx, Joseph Leonardus Gregorius Suijker, Antonius Arnoldus Duisters, Fransiscus Arnoldus Vermeulen
  • Metal halide lamp
    Patent number: 6597116
    Abstract: Metal halide lamps are disclosed having a discharge vessel with a ceramic wall. The discharge vessel encloses a discharge space comprising an ionizable gas filling and, in addition to Hg, an alkali iodide of Na or Li or a combination of both. The filling also includes TbI3 or GdI3 or a combination thereof.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: July 22, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Josephus Christiaan Maria Hendricx, Joseph Leonardus Gregorius Suijker, Antonius Arnoldus Duisters, Fransiscus Arnoldus Vermeulen
  • Metal halide lamp
    Publication number: 20010004191
    Abstract: The invention relates to metal halide lamps having a discharge vessel with a ceramic wall. The discharge vessel encloses a discharge space comprising an ionizable gas filling and, in addition to Hg, also an alkali iodide of Na or Li or a combination of both. According to the invention, the filling also comprises TbI3 or GdI3 or a combination thereof.
    Type: Application
    Filed: December 7, 2000
    Publication date: June 21, 2001
    Inventors: Josephus Christiaan Maria Hendricx, Joseph Leonardus Gregorius Suijker, Antonius Arnoldus Duisters, Fransiscus Arnoldus Vermeulen