Patents by Inventor Wolfgang E. Thouret

Wolfgang E. Thouret 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).

  • Incandescent lamp with high pressure rare gas filled tungsten-halogen element and transparent thick walled safety envelope
    Patent number: 4591752
    Abstract: An incandescent lamp unit in which a light emitting element of the tungsten-halogen type is placed within an outer, safety protecting transparent envelope. The element, being protected by the outer envelope, is filled with a gas at a high pressure, thereby increasing its efficiency, and the space between the element and the outer envelope is also preferably filled with a gas having good heat conductivity properties. The outer envelope also can have a coating of a material which transmits visible range energy and reflects infrared energy.
    Type: Grant
    Filed: October 14, 1983
    Date of Patent: May 27, 1986
    Assignee: Duro-Test Corporation
    Inventors: Wolfgang E. Thouret, Rudolph Kaufman, Harry Kee
  • Energy-efficient incandescent lamp with improved filament characteristics
    Patent number: 4461973
    Abstract: An energy-efficient incandescent lamp has a transparent heat mirror placed on the envelope. A diode is connected in series with the filament. This reduces the voltage across the filament and increases the current passing through it, so that shorter and greater diameter filament wire is used. This makes a stronger filament than is used in a conventional incandescent lamp with no diode, and makes the filament more resistant to displacement by mechanical forces.
    Type: Grant
    Filed: March 19, 1982
    Date of Patent: July 24, 1984
    Assignee: Duro-Test Corporation
    Inventors: Rudolph Kaufman, Wolfgang E. Thouret