Patents by Inventor Johannes R. Gelens

Johannes R. Gelens 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
    Patent number: 4383200
    Abstract: Low-pressure mercury vapor discharge lamp comprising a, preferably folded, discharge tube located within a lamp envelope and having electrodes and an electric stabilization ballast, which is partly surrounded by a thin-walled lamp base, which is connected to the envelope.In the region of the connection between the lamp base and the lamp envelope there is a metal plate for cooling the ballast, this heat sink being at the same time a mounting plate for further components in the lamp such as a starter switch.
    Type: Grant
    Filed: February 26, 1981
    Date of Patent: May 10, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Adrianus J. H. J. Van Zon, Johannes R. Gelens
  • Flashbulb unit
    Patent number: 4208700
    Abstract: A flashbulb unit comprising a housing, a plate-shaped support in the housing and an electrical circuit which is provided on the support and in which flashbulbs and break switches are incorporated. The unit comprises pushbuttons which are incorporated in a wall of the housing and which are arranged each opposite to a break switch and operate the break switch when being depressed.
    Type: Grant
    Filed: February 28, 1978
    Date of Patent: June 17, 1980
    Assignee: U.S. Philips Corporation
    Inventors: Bauke J. Roelevink, Johannes R. Gelens