Patents by Inventor Eric D. Hendry

Eric D. Hendry 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).

  • Patent number: 4503354
    Abstract: A photoconductive target camera tube provided to operate within a solenoid producing a uniform magnetic focusing field has a grid with a beam width defining aperture therein between the electron gun and the normally provided cylindrical anode. The aperture grid is mounted upon a ring of magnetic material which acts to reduce the magnitude of the focusing magnetic field at the plane of the aperture so to achieve a demagnification of the image of the aperture at the target with a consequent reduction in the beam spot size.
    Type: Grant
    Filed: November 27, 1981
    Date of Patent: March 5, 1985
    Assignee: English Electric Valve Company Limited
    Inventor: Eric D. Hendry
  • Patent number: 4298821
    Abstract: The invention provides a television camera tube having between the gun thereof and its target a baffle member formed as a wall integral with the tube and extending inwardly and towards the gun to provide a particle receiving cavity extending around the path of the beam of the gun for retaining loose particles originating from the gun and which would otherwise land upon the target of the tube when this is operated in a "face-down" position.
    Type: Grant
    Filed: September 12, 1979
    Date of Patent: November 3, 1981
    Assignee: English Electric Valve Company
    Inventor: Eric D. Hendry