Patents by Inventor Franklin A. Dolezal

Franklin A. Dolezal 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: 5655210
    Abstract: A corona source suitable for use in vehicle ignition systems uses a conductive coil that receives an RF input at one end and has a corona discharge site at the other end, with a reference electrode capacitively coupled to the coil. The pitch and the length of the coil are selected to produce a corona discharge in response to an RF input signal at a predetermined frequency and voltage, through quarter wavelength resonation. Either the new resonant coil or other corona discharge devices can be used to remediate fluid-borne wastes by initiating and sustaining RF corona discharges within the fluid. The pulses used to initiate the corona discharge preferably have alternating positive and negative components, with high initial voltages on the positive components to initiate the discharge, followed by lower positive voltage levels to sustain the discharge. Unipolar pulses, preferably with progressively decreasing voltage levels, can also be used.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: August 5, 1997
    Assignee: Hughes Aircraft Company
    Inventors: Daniel J. Gregoire, Robin J. Harvey, Franklin A. Dolezal, Weldon S. Williamson
  • Patent number: 5649507
    Abstract: A corona source suitable for use in vehicle ignition systems uses a conductive coil that receives an RF input at one end and has a corona discharge site at the other end, with a reference electrode capacitively coupled to the coil. The pitch and the length of the coil are selected to produce a corona discharge in response to an RF input signal at a predetermined frequency and voltage, through quarter wavelength resonation. Either the new resonant coil or other corona discharge devices can be used to remediate fluid-borne wastes by initiating and sustaining RF corona discharges within the fluid. The pulses used to initiate the corona discharge preferably have alternating positive and negative components, with high initial voltages on the positive components to initiate the discharge, followed by lower positive voltage levels to sustain the discharge. Unipolar pulses, preferably with progressively decreasing voltage levels, can also be used.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: July 22, 1997
    Assignee: Hughes Aircraft Company
    Inventors: Daniel J. Gregoire, Robin J. Harvey, Franklin Dolezal
  • Patent number: 5561298
    Abstract: Contaminant levels in a fluid such as air or water are reduced by producing a pulsed electron beam having an average primary electron energy of from about 90 to about 110 thousand electron volts (corresponding to an average injected electron energy of from about 45 to about 55 thousand electron volts in a preferred case) and directing the electron beam through the fluid. The contaminant compounds may include organic compounds and certain inorganic compounds such as NO.sub.x and SO.sub.x. The fluid is preferably contained in a contaminant reduction cell that is separated from an electron beam source by an electron-transparent window.
    Type: Grant
    Filed: February 9, 1994
    Date of Patent: October 1, 1996
    Assignee: Hughes Aircraft Company
    Inventors: Eun-Hee Cirlin, Weldon S. Williamson, Franklin A. Dolezal, Leroy J. Miller, John J. Vajo, John D. Williams
  • Patent number: 5549795
    Abstract: A corona source suitable for use in vehicle ignition systems uses a conductive coil that receives an RF input at one end and has a corona discharge site at the other end, with a reference electrode capacitively coupled to the coil. The pitch and the length of the coil are selected to produce a corona discharge in response to an RF input signal at a predetermined frequency and voltage, through quarter wavelength resonation. Either the new resonant coil or other corona discharge devices can be used to remediate fluid-borne wastes by initiating and sustaining RF corona discharges within the fluid. The pulses used to initiate the corona discharge preferably have alternating positive and negative components, with high initial voltages on the positive components to initiate the discharge, followed by lower positive voltage levels to sustain the discharge. Unipolar pulses, preferably with progressively decreasing voltage levels, can also be used.
    Type: Grant
    Filed: August 25, 1994
    Date of Patent: August 27, 1996
    Assignee: Hughes Aircraft Company
    Inventors: Daniel J. Gregoire, Robin J. Harvey, Franklin A. Dolezal, Weldon S. Williamson
  • Patent number: 5243618
    Abstract: A waveguide filter (22,24) is incorporated into a cavity resonator (20) for a free-electron laser or the like by coating a material layer (24) on the inner peripheral surface of a hollow waveguide member (22). A high pass filter configuration is provided when the conductivity of the material layer (24) is higher than that of the waveguide member (22), such that electromagnetic signals having wavelengths longer than the skin depth of the material layer (24) pass into and are affected by the lower conductivity waveguide member (22). Reversing the conductivities produces a low pass filter configuration in which signals having wavelengths shorter than the skin depth are affected by the material layer (24). A bandpass filter configuration is provided by adding an additional material layer (32) of low conductivity to a high pass filter, whereas a band exclusion filter configuration is produced by adding an additional material layer (32) of high conductivity to a low pass filter.
    Type: Grant
    Filed: November 22, 1991
    Date of Patent: September 7, 1993
    Assignee: Hughes Aircraft Company
    Inventors: Franklin A. Dolezal, Daniel J. Gregoire, Robin J. Harvey
  • Patent number: 4888776
    Abstract: An FEL array is comprised of adjacent FEL modules. Each module preferably uses a ribbon beam plasma-anode E-gun (PAG) or another plasma-assisted E-gun to produce a planar E-beam that interacts with a planar wiggler magnetic field. The modules may share a common electron gun. A control signal is input through a phase priming array to preselect the radiation mode. A planar, distributed Bragg resonator/reflector is used to set up a high-Q cavity, enabling the low gain module to produce high power radiation. The FEL modules are arranged in an array to reduce the output radiation flux density while achieving high output power density in the far-field, and to permit beam steering by phase control of individual modules. The relatively low current density of the individual E-guns lessens the size of the guiding magnetic field in each module to the extent that the wiggler magnetic field alone is sufficient to perform this guiding function.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: December 19, 1989
    Assignee: Hughes Aircraft Company
    Inventors: Franklin A. Dolezal, Robin J. Harvey