Patents by Inventor Lowell J. Fox

Lowell J. Fox 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).

  • Electron beam scrambler
    Patent number: 4621219
    Abstract: In an electron beam tube such as a gyrotron, electron dissipation on the collector wall is often quite non-uniform due to radial concentrations of the electrons. The dissipation is made more uniform by pseudo-random scrambling of trajectories by transverse magnetic fields which are non-uniform in transverse and axial dimensions.
    Type: Grant
    Filed: July 17, 1984
    Date of Patent: November 4, 1986
    Assignee: Varian Associates, Inc.
    Inventors: Lowell J. Fox, Joseph J. Manca
  • Waveguide load having reflecting structure for diverting microwaves into absorbing fluid
    Patent number: 4593259
    Abstract: A calorimetric load for very high microwave power at very high frequencies is formed by a metallic, cylindrical chamber into which the wave-guide carrying the power opens. Inside the metallic cylinder is a coaxial dielectric cylinder, with a space between full of circulating wave-absorbing fluid such as water. The incoming wave may be in a higher-order mode. To make it disperse rapidly into the absorbing fluid, a conical reflector is located inside the dielectric cylinder to reflect the wave outward.
    Type: Grant
    Filed: July 27, 1983
    Date of Patent: June 3, 1986
    Assignee: Varian Associates, Inc.
    Inventors: Lowell J. Fox, John Dimeff