Patents by Inventor Gilles Lemestreallan

Gilles Lemestreallan 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).

  • X-ray tube with a flat cathode and indirect heating
    Patent number: 5044005
    Abstract: Problems of thermal resistance of the cathode of an x-ray tube are solved by constructing a flat cathode in the form of a hollow beam. This ensures rigidity of the cathode which is inherent in its beam shape without being attended by the disadvantages of excessive thermal inertia.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: August 27, 1991
    Assignee: General Electric CGR S.A.
    Inventors: Sixte De Fraguier, Gilles Lemestreallan, Francois Caire
  • Self-limiting x-ray tube with flat cathode and stair-step focusing device
    Patent number: 5033072
    Abstract: Problems of thermal resistance of the anode of an x-ray tube are solved by constructing a flat cathode which is set within a stair-step focusing device. It is shown that, depending on the shape of this device, the heat output on the anode is limited by a saturation value which is lower than a limit of thermal resistance of the x-ray tube. In order to improve the thermal resistance of the cathode, a cathode is constructed in the form of a hollow beam. This ensures rigidity of the cathode which is inherent in its beam shape without being attended by the disadvantages of excessive thermal inertia.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: July 16, 1991
    Assignee: General Electric CGR S.A.
    Inventors: Guillaume Fournier, Francois Caire, Gilles Lemestreallan