Patents by Inventor Peter Robert Davis

Peter Robert Davis 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).

  • Travelling wave tube having an improved magnetic focussing field
    Patent number: 4057749
    Abstract: The magnetic field produced by the periodic permanent magnets of a travelling wave tube is shaped to improve the transmission ratio of the electron beam. The first zero magnetic field occurs within the magnet region, and the first peak magnetic field occurs at the first minima of the diameter of the electron beam.
    Type: Grant
    Filed: April 2, 1976
    Date of Patent: November 8, 1977
    Assignee: English Electric Valve Company Ltd.
    Inventor: Peter Robert Davis
  • Travelling wave tubes
    Patent number: 4057748
    Abstract: A travelling wave tube having a periodic permanent magnetic focusing structure is provided with ferromagnetic plates having copper inserts which conduct heat away from the electron beam path and reduce the formation of hot spots.
    Type: Grant
    Filed: February 17, 1976
    Date of Patent: November 8, 1977
    Assignee: English Electric Valve Company Ltd.
    Inventor: Peter Robert Davis
  • Travelling wave tubes
    Patent number: 4041349
    Abstract: A travelling wave tube having cavities coupled for the fundamental mode uses a periodic permanent magnetic focussing structure. Ferromagnetic plates which carry the magnetic field to the electron beam path are provided with axial extensions adjacent to the electron beam to increase the magnetic field strength.
    Type: Grant
    Filed: February 17, 1976
    Date of Patent: August 9, 1977
    Assignee: English Electric Valve Company Limited
    Inventor: Peter Robert Davis