Patents by Inventor Franciscus M. P. Oostvogels

Franciscus M. P. Oostvogels 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).

  • Irradiation device comprising a short arc discharge lamp
    Patent number: 4757427
    Abstract: The irradiation device comprises a short arc discharge lamp, in which a pair of electrodes are arranged, between which a discharge path extends. An optical conductor is sealed with its first end into the wall of the lamp vessel in such a manner that its light entrance window is arranged laterally of the discharge path and is directed to the discharge path.
    Type: Grant
    Filed: October 21, 1986
    Date of Patent: July 12, 1988
    Assignee: U.S. Philips Corporation
    Inventors: Franciscus M. P. Oostvogels, Charles C. E. Meulemans, Adrianus P. Severijns, Petrus J. W. Severin
  • Low-pressure alkali metal vapor discharge lamp with arc tube gettering
    Patent number: 4588919
    Abstract: A low-pressure alkali metal vapor discharge lamp has a getter for bi- and triatomic gases and a getter holder in the arc tube near at least one electrode. The electrodes need be heated less strongly during evacuation of the prior to final dosing, as a result of which no emitter material of the electrodes is lost. The ignition voltage is considerably lower than that of conventional lamps without a getter.
    Type: Grant
    Filed: April 9, 1984
    Date of Patent: May 13, 1986
    Assignee: U.S. Philips Corporation
    Inventors: Wiggert Kroontje, Franciscus M. P. Oostvogels
  • High-pressure discharge lamp
    Patent number: 4233542
    Abstract: High-pressure discharge lamps, having a sealed discharge vessel surrounded by a sealed glass envelope, are known in which an oxidizable metal foil (e.g. of molybdenum) is located, in the space between the vessel and the envelope substantial on the axis of the vessel and is electrically in series with the discharge path. If the envelope is fractured for any reason and the lamp is subsequently ignited, the temperature of the foil is increased due to the discharge current passing through it. The foil is oxidized, and hence fractured, by the air which has permeated said space and the lamp is, extinguished. Such oxidation and fracture normally takes about ten minutes. In accordance with the invention, the foil (14) in the space between the envelope (1) and vessel (2) is arranged close to the wall of the vessel adjacent to an electrode (6) so as to be heated mainly by heat generated in the vessel. This reduces the fracturing time to about one minute.
    Type: Grant
    Filed: October 18, 1978
    Date of Patent: November 11, 1980
    Assignee: U.S. Philips Corporation
    Inventors: Franciscus M. P. Oostvogels, Gustaaf Melis, Aime P. A. M. Van Laarhoven
  • Low-pressure mercury vapor discharge lamp
    Patent number: 4129802
    Abstract: A low-pressure mercury vapor discharge lamp having an internal transmissive starting strip with two separate parts. The separation between the parts is bridged by a narrow straight or helix-shaped conductive connecting strip to bring the total resistance of the starting strip to a value between 50,000 and 150,000 ohms.
    Type: Grant
    Filed: September 6, 1977
    Date of Patent: December 12, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Louis E. Vrenken, Franciscus M. P. Oostvogels, Rein W. VAN DER Wolf