Patents by Inventor Henricus P. M. Gubbels

Henricus P. M. Gubbels 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).

  • Low pressure mercury vapor discharge lamp with ceramic electrode shield
    Patent number: 6525473
    Abstract: A low-pressure mercury-vapor discharge lamp is provided with a discharge vessel and a first and a second end portion (12a). The discharge vessel encloses a discharge space provided with a filling of mercury and an inert gas in a gastight manner. Each end portion (12a) supports an electrode (20a) arranged in the discharge space. An electrode shield (22a) encompasses at least one of the electrodes (20a) and is made from a ceramic material. Preferably, the electrode shield (22a) is tubular in shape with a lateral slit directed towards the discharge space. The lamp according to the invention has a comparatively low mercury consumption.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: February 25, 2003
    Assignee: Koninklijke Phillips Electronics N.V.
    Inventors: Cornelis J. M. Denissen, Cornelis R. Ronda, Wilhelmus M. P. Van Kemenade, Henricus P. M. Gubbels
  • Low pressure mercury vapor discharge lamp with ceramic electrode shield
    Publication number: 20020074942
    Abstract: A low-pressure mercury-vapor discharge lamp is provided with a discharge vessel and a first and a second end portion (12a). The discharge vessel encloses a discharge space provided with a filling of mercury and an inert gas in a gastight manner. Each end portion (12a) supports an electrode (20a) arranged in the discharge space. An electrode shield (22a) encompasses at least one of the electrodes (20a) and is made from a ceramic material. Preferably, the electrode shield (22a) is tubular in shape with a lateral slit directed towards the discharge space. The lamp according to the invention has a comparatively low mercury consumption.
    Type: Application
    Filed: November 5, 2001
    Publication date: June 20, 2002
    Applicant: U.S. PHILIPS CORPORATION
    Inventors: Cornelis J.M. Denissen, Cornelis R. Ronda, Wilhelmus M.P. Van Kemenade, Henricus P.M. Gubbels
  • Low-pressure mercury vapor discharge lamp with electrode shield
    Patent number: 6359385
    Abstract: A low-pressure mercury-vapor discharge lamp is provided with a discharge vessel and a first and a second end portion (12a). The discharge vessel encloses a discharge space provided with a filling of mercury and an inert gas in a gastight manner. Each end portion (12a) supports an electrode (20a) arranged in the discharge space. An electrode shield (22a) encompasses at least one of the electrodes (20a) and is made from a ceramic material. Preferably, the electrode shield (22a) is tubular in shape with a lateral slit directed towards the discharge space.
    Type: Grant
    Filed: May 4, 1999
    Date of Patent: March 19, 2002
    Assignee: U.S. Philips Corporation
    Inventors: Cornelis J. M. Denissen, Cornelis R. Ronda, Wilhelmus M. P. Van Kemenade, Henricus P. M. Gubbels
  • High-pressure discharge lamp with metal layer on outer surface
    Patent number: 5541480
    Abstract: The invention relates to a high-pressure discharge lamp provided with a discharge vessel with a ceramic wall which has an outer surface on which a metallic coating is present. According to the invention, the coating is a metal layer sintered on the ceramic wall, which sintering process takes place during sintering of the discharge vessel so as to achieve translucence.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: July 30, 1996
    Assignee: U.S. Philips Corporation
    Inventors: Max L. P. Renardus, Henricus P. M. Gubbels, Raghu Ramaiah