Patents by Inventor Robert C. English

Robert C. English 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).

  • Quick warm-up cathode heater for high average power magnetrons
    Patent number: 5130601
    Abstract: An uncoated radiative heating filament wire is electrically and thermally isolated from the cathode of a high power magnetron. The filament wire helically surrounds the cathode support rod and is suspended above the support rod surface by ceramic members. A reflective shell envelops the helical filament wire and cathode support rod. The shell reflects radiated heat from the filament wire evenly upon the cathode support rod.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: July 14, 1992
    Assignee: Litton Systems, Inc.
    Inventors: Christopher M. Walker, Geoffrey Thornber, Robert C. English
  • High impedance circuit for injection locked magnetrons
    Patent number: 5045814
    Abstract: A high impedance circuit has radially disposed first vanes and radially disposed second vanes interdigitating between the first vanes. The first vanes and the second vanes are each interconnected by a first toroidal strap and a second toroidal strap, respectively. The first strap and the second strap are dipsosed co-axially on opposite sides of the vane structure. The vanes and straps are dimensioned so that the circuit has a single cavity impedance commensurate with a predetermined interaction impedance for the oscillator which is sufficient to sustain oscillation for a preselected injection locking bandwidth of the oscillator.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: September 3, 1991
    Assignee: Litton Systems, Inc.
    Inventors: Robert C. English, Geoffrey Thornber, Christopher M. Walker
  • High impedance circuit for injection locked magnetrons
    Patent number: RE34863
    Abstract: A high impedance circuit has radially disposed first vanes and radially disposed second vanes interdigitating between the first vanes. The first vanes and the second vanes are each interconnected by a first toroidal strap and a second toroidal strap, respectively. The first strap and the second strap are disposed co-axially on opposite sides of the vane structure. The vanes and straps are dimensioned so that the circuit has a single cavity impedance commensurate with a predetermined interaction impedance for the oscillator which is sufficient to sustain oscillation for a preselected injection locking band-width of the oscillator.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: February 21, 1995
    Assignee: Litton Systems, Inc.
    Inventors: Robert C. English, Geoffrey Thornber, Christopher M. Walker