Patents by Inventor Alan Griggs

Alan Griggs 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).

  • Collector for an electron beam tube
    Patent number: 5841221
    Abstract: A collector for an electron beam tube includes a ceramic cylinder within which are located rings of a first material, such as copper, and rings of a second material, such as molybdenum, arranged alternately along the longitudinal axis of the cylinder. The ratio of the axial lengths of the rings at the inner surface of the ceramic cylinder is selected so as to provide temperature compensation. The rings of one material surround part of adjacent rings of the other material to confine thermal expansion in a radial direction.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: November 24, 1998
    Assignee: EEV Limited
    Inventor: Alan Griggs
  • Coupled cavity travelling wave tubes
    Patent number: 4746833
    Abstract: A coupled cavity TWT comprises a hollow copper tube having a plurality of tranverse walls of iron which define cavities. The walls each include an aperture on the longitudinal axis of the tube through which an electron beam passes during operation of the TWT. Any energy dissipated by electrons colliding with the surfaces of the apertures is conducted as heat away from the walls along thermal conduction paths which include copper elongate members.
    Type: Grant
    Filed: April 17, 1986
    Date of Patent: May 24, 1988
    Assignee: English Electric Valve Company Limited
    Inventors: Robin C. M. King, Richard G. Carter, Alan Griggs