Patents by Inventor Johannes Adrianus Josephus Maria Van Vliet

Johannes Adrianus Josephus Maria Van Vliet 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).

  • Electric device provided with a metal vapor discharge lamp
    Patent number: 4117371
    Abstract: A metal vapor discharge lamp includes a discharge tube with main electrodes at each end. A starting electrode extends around at least an axial portion of the tube intermediate the main electrodes, one main electrode is connected to the starting electrode by a first resistance and the other main electrode is connected to the other electrode by a second resistance. At least one of the resistances has a temperature dependent characteristic which is substantially more positive than the other resistance.
    Type: Grant
    Filed: January 7, 1977
    Date of Patent: September 26, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Johannes Adrianus Josephus Maria Van Vliet, Pieter Hendrik Broerse
  • Method of operating a self-stabilizing discharge lamp
    Patent number: 4039880
    Abstract: The invention relates to a method of operating a self-stabilizing discharge lamp provided with a discharge tube which is filled with sodium and xenon.According to the invention the discharge lamp is operated in such a manner that a sodium pressure is produced in the discharge space which results in a high luminous efficacy.
    Type: Grant
    Filed: December 18, 1975
    Date of Patent: August 2, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Louis Benjamin Beijer, Mijndert Koedam, Jacobus Marinus Maria Claassens, Johannes Adrianus Josephus Maria Van Vliet