Patents by Inventor Theodorus J. H. Smeelen

Theodorus J. H. Smeelen 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).

  • Electrodeless discharge lamp with rapid light build-up
    Patent number: 4622495
    Abstract: An electrodeless fluorescent lamp having a core of magnetic material surrounded by a coil for producing a high-frequency magnetic field in a lamp vessel surrounding the core and coil. An amalgam holder is located in the vessel, in the region surrounding the core where the electric discharge is formed so that the amalgam is heated directly by the discharge. Substantially all the mercury contained in this amalgam is released quickly after the lamp is turned on, so that the light output rises rapidly.
    Type: Grant
    Filed: March 9, 1984
    Date of Patent: November 11, 1986
    Assignee: U.S. Philips Corporation
    Inventor: Theodorus J. H. Smeelen