Patents by Inventor Robert S. Symons

Robert S. Symons 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).

  • Patent number: 7165413
    Abstract: An integrated liquid cooling device for electronic components addresses the need for efficient cooling created by ever increasing power densities of electronic components. The integrated liquid cooling device has a housing enclosing the electronic component, cooling liquid contained in the housing, a motor immersed in the cooling liquid and mounted to the housing, an impeller driven by the motor, and cooling surfaces on the exterior of the housing. The motor driven impeller creates a turbulent flow in the cooling liquid and a high velocity liquid flow over the electronic component, which rapidly transfers heat from the electronic component and distributes it throughout the interior of the housing. The cooling surfaces on the exterior of the housing dissipate this heat, either by free or forced convection, into the surrounding environment.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: January 23, 2007
    Inventor: Robert S. Symons
  • Patent number: 7162887
    Abstract: An integrated liquid cooling device for electronic components addresses the need for efficient cooling created by ever increasing power densities of electronic components. The integrated liquid cooling device has a housing thermally connected to the electronic component, cooling liquid contained in the housing, a motor immersed in the cooling liquid and mounted to the housing, an impeller driven by the motor, and cooling surfaces on the exterior of the housing. The motor driven impeller creates a turbulent flow in the cooling liquid, which rapidly transfers heat from the electronic component and distributes it throughout the interior of the housing. The cooling surfaces on the exterior of the housing dissipate this heat, either by free or forced convection, into the surrounding environment.
    Type: Grant
    Filed: July 9, 2004
    Date of Patent: January 16, 2007
    Inventor: Robert S. Symons
  • Publication number: 20030141448
    Abstract: A high-current, high-gradient, high-efficiency, multi-stage cavity cyclotron resonance accelerator (MCCRA) provides energy gains of over 50 MeV/stage, at an acceleration gradient that exceeds 20 MeV/m, in room temperature cavities. The multi-stage cavity cyclotron resonance accelerator includes a charged particle source, a plurality of end-to-end rotating mode room-temperature cavities, and a solenoid coil. The solenoid coil encompasses the cavities and provides a substantially uniform magnetic field that threads through the cavities. Specifically, the MCCRA is provided with a constant magnetic field sufficient to produce a cyclotron frequency a little higher than the RF of the accelerating electric field. A plurality of input feeds, each of which respectively coupled to a cavity, are also provided. According to an embodiment of the invention, the beam from the first cavity passes through a cutoff drift tube and is accelerated further with a cavity supporting a still lower radio-frequency electric field.
    Type: Application
    Filed: March 1, 2001
    Publication date: July 31, 2003
    Inventor: Robert S. Symons
  • Publication number: 20010011924
    Abstract: A linear amplifier comprises an electron gun assembly having a cathode, and an anode spaced from the cathode. A relatively high voltage potential is applied between the anode and the cathode, and the cathode provides an electron beam in response to the relatively high voltage potential. A control grid is spaced between the cathode and the anode, and is coupled to an input port adapted to receive the input signal. The input signal causes the control grid to density modulate the beam. The control grid is also coupled to a bias voltage source to preclude transmission of the electron beam during the negative half cycle of the input signal. A plurality of collector stages are provided with a respective electric potential thereto ranging between a potential of the cathode and a potential of the anode to efficiently collect the electrons of the beam after passing the anode.
    Type: Application
    Filed: July 3, 1997
    Publication date: August 9, 2001
    Inventor: ROBERT S. SYMONS
  • Patent number: 5604402
    Abstract: A harmonic gyro-TWT is provided that has only one possible mode of operation. The harmonic gyro-TWT comprises a waveguide and an electron beam projected through the waveguide and encircling an axis of the waveguide. A plurality of evenly spaced electrical conductors are disposed within the waveguide parallel to the axis and spaced a fixed distance from an inner wall of the waveguide. The electrical conductors are connected together at an end of the waveguide. The electrical conductors are excited in phase with an AC signal connected between the electrical conductors and the inner wall of the waveguide. As a result, a multipole field having an order equal to twice the number of electrical conductors is defined within the waveguide. A plurality of support rails couple the inside surface of the waveguide to each respective one of the plurality of electrical conductors.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: February 18, 1997
    Assignee: Litton Systems, Inc.
    Inventor: Robert S. Symons
  • Patent number: 5469022
    Abstract: An extended interaction output circuit is provided for interacting with a modulated electron beam and for outputting RF electromagnetic energy. The circuit comprises a plurality of linearly disposed cavities having an axially extending beam tunnel to permit the traveling therethrough of the modulated electron beam as well as to couple electromagnetic energy between the successive cavities. Each of the cavities is separated by an annular disk having a hole providing the axial beam tunnel. The hole diameters increase in steps so that the impedance of the successive cavities decreases along the axial extent of the circuit. The diameter of the successive cavities is also increased as the associated width is decreased to maintain the same mid-band resonant frequency. The linearly disposed cavities act as an RF filter having successively tapered impedances to reduce reflections of the electromagnetic energy propagating through the circuit.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: November 21, 1995
    Assignee: Litton Systems, Inc.
    Inventors: Syeda R. Begum, Robert S. Symons
  • Patent number: 5469024
    Abstract: A leaky wall filter for use in an EIK comprises a plurality of guidelets intersecting perpendicularly with a wall of an output waveguide of the EIK. The guidelets would propagate 2.pi. mode oscillation frequencies from the EIK out of the output waveguide. A load matched to the 2.pi. mode disposed at the end of the guidelets provides termination for the 2.pi. mode oscillation frequencies and prevents the initiation of oscillation. The load comprises a plenum disposed at an end of the guidelets opposite to the output waveguide, a window having a first surface within the plenum, and a water load provided at a second surface of the window. The 2.pi. mode oscillation frequencies propagating through the guidelets are impedance matched by the window and coupled into the water load for termination. Since a portion of the operating frequency power also leaks through the guidelets into the plenum due to insertion loss, this combined RF power also couples into the water load and is converted into thermal energy.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: November 21, 1995
    Assignee: Litton Systems, Inc.
    Inventors: Mark F. Kirshner, Robert S. Symons
  • Patent number: 5391998
    Abstract: A modulator for producing repetitive short high voltage pulses is provided. The modulator includes a high voltage power supply, a plurality of pulse forming networks each capable of being charged to a potential equal to twice the voltage of the high voltage power supply, and a plurality of switches interconnecting the pulse forming networks. The switches have a first state connecting the pulse forming networks in parallel with the high voltage power supply to charge the pulse forming networks, and a second state connecting the pulse forming networks in series to discharge the pulse forming networks into a load. The pulse forming networks are charged by use of a resonant charging technique. The modulator further includes an input configured to receive a triggering pulse, the triggering pulse causing the switches to change from the first state to the second state.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: February 21, 1995
    Assignee: Litton Systems, Inc.
    Inventor: Robert S. Symons
  • Patent number: 5304942
    Abstract: An extended interaction output circuit interacts with a modulated electron beam and outputs RF electromagnetic energy. The circuit comprises a plurality of linearly disposed cavities each having a gap permitting the traveling therethrough of the modulated electron beam. A first pair of the linearly disposed cavities is coupled by a single side cavity, a second pair of the linearly disposed cavities is coupled by a pair of side cavities radially disposed 180 degrees apart, and a third pair of the linearly disposed cavities is coupled by three side cavities radially disposed 120 degrees apart. The linearly disposed cavities act as an RF filter having successively tapered impedances to reduce reflections of the electromagnetic energy propagating through the circuit. RF energy is extracted from the fourth cavity through four waveguide sections that are radially disposed 90 degrees apart.
    Type: Grant
    Filed: May 12, 1992
    Date of Patent: April 19, 1994
    Assignee: Litton Systems, Inc.
    Inventors: Robert S. Symons, Syeda Begum
  • Patent number: 4931694
    Abstract: A coupled-cavity circuit for a microwave electron tube is shown having one or more cavities whose cross-sections are polygonally shaped, such as rectangles. Located in one or more corners of the polygonally shaped cavities are irises which have a higher resonant frequency. These irises are generally triangularly shaped with rounded corners and one leg of the triangle rounded about the drift tube of the microwave electron tube.
    Type: Grant
    Filed: June 1, 1988
    Date of Patent: June 5, 1990
    Assignee: Litton Systems, Inc.
    Inventors: Robert S. Symons, Mark F. Kirshner
  • Patent number: 4931695
    Abstract: There is provided a high performance extended interaction output circuit [EIOC] having two cavities. The EIOC of the present invention has an image impedance which is twice the magnitude of its output load resistance. The EIOC of the present invention also includes a three cavity EIOC which has two image impedances, the second image impedance being one half the magnitude of the first image impedance while the output load impedance of the three cavity EIOC is one third the magnitude of the first image impedance.
    Type: Grant
    Filed: June 2, 1988
    Date of Patent: June 5, 1990
    Assignee: Litton Systems, Inc.
    Inventor: Robert S. Symons
  • Patent number: 4800322
    Abstract: A klystron having floating cavity clusters, each with two or more closely spaced cavities.
    Type: Grant
    Filed: October 1, 1987
    Date of Patent: January 24, 1989
    Assignee: Litton Systems, Inc.
    Inventor: Robert S. Symons
  • Patent number: 4531103
    Abstract: In a gyro-monotron oscillator a single, "monotron" cavity is used to interact with the electron beam. To handle very high powers without excessive cavity loss, the cavity is excited in a higher order mode such as TE.sub.0m1. Other modes can be resonant in the cavity, interfering with the operation when their frequency is near the operating frequency.To increase the mode separation, an upstream section of the cavity is made smaller, to support only a lower-order mode such as TE.sub.011. Also, the beam is pre-bunched by this lower order, interference-free mode so has less tendency to interact with spurious modes in the higher order cavity.
    Type: Grant
    Filed: December 10, 1982
    Date of Patent: July 23, 1985
    Assignee: Varian Associates, Inc.
    Inventors: Steven J. Evans, Robert S. Symons
  • Patent number: 4506190
    Abstract: Some electrons reflected from the collector of a klystron form a beam current flowing back toward the input end of the tube. This beam is modulated and can carry a regenerate signal which distorts the tube's performance when amplifying a television signal. The reflected electrons are removed by a spiralling transverse magnetic field having a pitch equal to the cyclotron wavelength in the axial magnetic field used to focus the beam. The rotative sense of the spiral is such that forward-going beam electrons are not affected but returning electrons are accelerated in their cyclotron orbits until they are driven outside the beam and are collected.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: March 19, 1985
    Assignee: Varian Associates, Inc.
    Inventor: Robert S. Symons
  • Patent number: 4442417
    Abstract: A solenoidal magnet coil is used to generate an axial field for focusing a beam of electrons through a linear-beam electron tube. In high-power tubes, the coil typically cannot extend over the entire length of the focused electron beam because it would interfere with the waveguide used to carry out the generated wave power. Thus the axial magnetic field strength falls off near the output end, a region in which it would be desirable to have it uniform or even slightly increasing. Very often the coil is foil-wound and its output end has a notch to allow passage of the waveguide. A similar notch 180 degrees away compensates the sideways distortion of field caused by displacement of coil current away from the notch impediment. In the non-notched regions the current spreads throughout the coil cross-section, but there is still a fall-off of field strength on the axis due to current displacement away from the output end.
    Type: Grant
    Filed: January 26, 1982
    Date of Patent: April 10, 1984
    Assignee: Varian Associates, Inc.
    Inventor: Robert S. Symons
  • Patent number: 4398121
    Abstract: In a gyrotron electron tube of the gyro-klystron or gyro-monotron type, having a cavity supporting an electromagnetic mode with circular electric field, spurious resonances can occur in modes having noncircular electric field. These spurious resonances are damped and their frequencies shifted by a circular groove in the cavity parallel to the electric field.
    Type: Grant
    Filed: February 5, 1981
    Date of Patent: August 9, 1983
    Assignee: Varian Associates, Inc.
    Inventors: Marvin Chodorow, Robert S. Symons
  • Patent number: 4393332
    Abstract: In a Gyrotron electron tube, oscillating motion perpendicular to the axis of a linear electron beam is produced by a helical component of magnetic field. The length along the beam of the helical field is critically chosen so that electrons at various radii from the axis all acquire equal transverse energy.
    Type: Grant
    Filed: September 5, 1980
    Date of Patent: July 12, 1983
    Assignee: Varian Associates, Inc.
    Inventor: Robert S. Symons
  • Patent number: 4388555
    Abstract: In a gyrotron microwave tube, electromagnetic leakage through beam-transmitting drift tubes is greatly reduced by making the diameter of the drift tubes in centimeters less than 8.8 divided by f where f is the operating frequency in gigahertz.
    Type: Grant
    Filed: March 9, 1981
    Date of Patent: June 14, 1983
    Assignee: Varian Associates, Inc.
    Inventors: Robert S. Symons, Howard R. Jory
  • Patent number: 4200820
    Abstract: A high power gyro device includes a source of electrons. The electrons from this source are formed into a beam in which individual electrons are made to follow helical paths by a DC magnetic field. The angular velocity of the beam electrons is modulated as the beam passes through an oscillating electric field in a resonant cavity or waveguide so that a high power electromagnetic wave is established in the region as a result of an interaction between the beam and field. A collector for the beam is positioned on the axis, while an output waveguide for the wave is positioned at right angles to the axis. Upstream of the collector, the wave is reflected to the output waveguide by a reflecting surface having an aperture for passing the electron beam to the collector.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: April 29, 1980
    Assignee: Varian Associates, Inc.
    Inventor: Robert S. Symons