Patents by Inventor Daniel Pigache

Daniel Pigache 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 operating by secondary emission under ionic bombardment
    Patent number: 4777370
    Abstract: The electron gun comprises an ionization chamber, adjacent to a high voltage chamber. In the wall common the both chambers provision is made for an extraction grid. On the opposite side, the ionization chamber comprises an outlet window for the electrons similar in shape to the extraction grid, and accompanied by a fine metallic foil. The high voltage chamber comprises a cathode brought to a high negative voltage. By giving the two grids the shape of similar parallel strips, a masking effect and a focusing effect are obtained at one and the same time which allows the efficiency of the electron gun to be increased.
    Type: Grant
    Filed: November 18, 1986
    Date of Patent: October 11, 1988
    Assignee: Office National d'Etudes et de Recherche Aerospatiales (ONERA)
    Inventors: Daniel Pigache, Francois Danel