Patents by Inventor Norman R. Franzen

Norman R. Franzen 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).

  • Accelerating and scan expansion electron lens means for a cathode ray tube
    Patent number: 4623819
    Abstract: A post-deflection accelerating and scan expansion lens system (10) is disclosed which may be used in a cathde ray tube (12). The lens system comprises an accelerating and scan expansion lens (70) of the quadrupole type including a pair of coaxial cylindrical electrodes (72, 74) and first and second compensating lenses (66, 78) on opposite ends thereof to provide a bright image of the desired size in sharp focus and great detail on a fluorescent screen in such tube. The first compensating lens (66) is supported adjacent the input of the accelerating and scan expansion lens to provide a linear magnification of the amount of electron beam deflection produced by the vertical and horizontal deflection plates (46, 48 and 50, 52).
    Type: Grant
    Filed: August 12, 1985
    Date of Patent: November 18, 1986
    Assignee: Tektronix, Inc.
    Inventors: Bozidar Janko, Norman R. Franzen, Myron A. Bostwick, Jr.