Patents by Inventor Robert L. Kelling

Robert L. Kelling 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).

  • Ceramic envelope plug and lead wire and seal
    Patent number: 3992642
    Abstract: A metal vapor arc lamp comprises an alumina ceramic arc tube having an end sealed by an apertured ceramic plug. A metal lead wire extending through the aperture is sealed therein, and supports an electrode within the arc tube. Thermal isolation of the lead wire seal from the electrode is necessary and is achieved by providing a loop in the supporting conductor intervening between the electrode and the lead wire seal region.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: November 16, 1976
    Inventors: Charles I. McVey, Robert L. Kelling