Patents by Inventor Thomas A. Brewin

Thomas A. Brewin 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).

  • Ruggedized, high power tungsten-halogen lamp
    Patent number: 4023060
    Abstract: A high power tungsten-halogen lamp having a filament arrangement suspended between a pair of alumina bridge members which are supported by a pair of vertically disposed tungsten rods. To provide a ruggedized mount, the free ends of the vertical rods are retained in respective externally protruding cavities provided in the dome of the lamp envelope.
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: May 10, 1977
    Assignee: GTE Sylvania Incorporated
    Inventors: Bernard Pike, Thomas A. Brewin, Charles Kokinos, Jr.
  • Three-electrode short duration flash tube
    Patent number: 4004189
    Abstract: A flash tube having an elongated tubular envelope containing a pair of anode electrodes disposed at opposite ends and a centrally located cathode electrode which is common to both anodes for simultaneously defining two separate arc discharge paths during operation. The three-electrode configuration is particularly useful in photograhic and photocopying applications for minimizing dark spots and providing a shorter flash duration.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: January 18, 1977
    Assignee: GTE Sylvania Incorporated
    Inventors: Robert J. Cosco, John A. Pappas, Thomas A. Brewin