Patents by Inventor Jean P. Sembely

Jean P. Sembely 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).

  • Electron gun for cathode ray tube
    Patent number: 4914724
    Abstract: Disclosed is an electron gun for cathode ray tubes successively comprising an electron source electrode or cathode, a control or Wehnelt electrode, a first acceleration electrode or anode carried to an adjustable voltage and at least one focusing or second acceleration electrode in which there is inserted, between the first acceleration electrode and the focusing or second acceleration electrode, an additional electrode which is carried, during operation, to a fixed biase voltage, this electrode forming a low-powered electrostatic lens with the anode electrode and forming a high-powered electrostatic lens with the second acceleration electrode.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: April 3, 1990
    Assignee: Thomson-CSF
    Inventors: Jacques Chevalier, Jean P. Sembely