Patents by Inventor Geoffrey J. Rowlands

Geoffrey J. Rowlands 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).

  • Magnetron having cavity wall vibrated by tuning fork
    Patent number: 4311968
    Abstract: A co-axial magnetron in which the microwave output frequency can be rapidly altered within a particular frequency band. A movable tuning plate is coupled to a mechanical tuning fork which is set into vibration by an alternating voltage applied to a solenoid.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: January 19, 1982
    Assignee: English Electric Valve Company Limited
    Inventors: Alan H. Pickering, Geoffrey J. Rowlands
  • Co-axial multi cavity anode magnetrons
    Patent number: 4246512
    Abstract: In a co-axial multi cavity anode magnetron spurious resonances which would otherwise occur in the space between a magnetic pole piece and an anode shell are suppressed. The resonances may be suppressed by means of short circuit pins located within the anode shell.
    Type: Grant
    Filed: April 25, 1979
    Date of Patent: January 20, 1981
    Assignee: English Electric Valve Company Limited
    Inventors: Alan H. Pickering, Geoffrey J. Rowlands, David R. Tice