Patents by Inventor Andrew J. T. Holmes

Andrew J. T. Holmes 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).

  • Tandem accelerator
    Patent number: 5293134
    Abstract: A tandem accelerator for producing a beam of positively charged particles in which the positive ion producing and accelerating region of the apparatus is operated under vacuum conditions.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: March 8, 1994
    Assignee: United Kingdom Atomic Energy Authority
    Inventors: Andrew J. T. Holmes, Gary Proudfoot
  • Charged particle control device
    Patent number: 5030885
    Abstract: A plasma source of charged particles includes a particle extraction control device consisting of an electrode having an exit hole in it and a planar solenoid arranged to produce, when energized, a magnetic field across the exit hole in the electrode, the magnitude of the magnetic field and potentials applied to extraction electrodes being variable so as to enable different charged particles to be emitted by the source.
    Type: Grant
    Filed: August 22, 1989
    Date of Patent: July 9, 1991
    Assignee: United Kingdom Atomic Energy Authority
    Inventor: Andrew J. T. Holmes