Patents Represented by Attorney, Agent or Law Firm Wanda K. Denson-Low
  • Patent number: 5786739
    Abstract: A waveguide evanescent mode filter is integrated with a monolithic microwave integrated circuit (MMIC) by forming both the MMIC circuitry and the waveguide filter on a single substrate that forms a common ground plane for both elements. The waveguide has a superstructure with an interior recess that is contoured to provide a desired cutoff frequency. The underlying portion of the ground plane can form the lower portion of the waveguide itself, and can also be contoured to define the cutoff frequency. Adjustable attenuation is provided by a resistive card that can be inserted by different amounts into the waveguide.
    Type: Grant
    Filed: September 3, 1996
    Date of Patent: July 28, 1998
    Assignee: Hughes Electronics
    Inventors: Jeffrey A. Paul, Chaim Warzman, Roy Wien, Richard T. Hennegan
  • Patent number: 5786107
    Abstract: A battery system includes a battery cell having a cylindrical battery cell housing and a housing support external to the battery cell housing. The housing support is formed of an electrical insulator layer contacting the cylindrical external surface of the battery cell housing, and a heat conductor formed of heat-conducting fibers overlying and contacting the electrical insulator layer and aligned generally parallel to the cylindrical axis of the battery cell housing. The heat-conducting fibers are made of high-thermal-conductivity graphite and have a sink end. A fiber-reinforced composite structural support layer is applied overlying the heat-conducting fibers to force the electrical insulator layer into contact with the battery cell housing without the presence of an adhesive between the electrical insulator and the battery cell housing. A thermal sink is in thermal contact with the sink ends of the plurality of heat-conducting fibers at a first end of the cylindrical battery cell housing.
    Type: Grant
    Filed: May 9, 1996
    Date of Patent: July 28, 1998
    Assignee: Hughes Electronics
    Inventors: John P. Stafford, Walter Rex Oswald, Susan K. Ferer, Steven J. Stadnick
  • Patent number: 5783984
    Abstract: In a prefer embodiment, an integrated transformer and inductor on a singe core structure to provide an impedance matching function and an inductor in series with the transformer's secondary which includes: a transformer core structure having a primary leg, a secondary leg, and a center leg containing an air gap, said center leg disposed parallel to said primary leg and secondary leg, whereby said air gap provides control of said inductor value; a primary winding on said primary leg; and a secondary winding on said secondary leg.
    Type: Grant
    Filed: June 16, 1995
    Date of Patent: July 21, 1998
    Assignee: Hughes Electronics
    Inventor: Carl Edward Keuneke
  • Patent number: 5781243
    Abstract: Night vision apparatus including an infrared night vision sensor having a selected field of view and a display panel positioned for displaying an image detected by the sensor, the display panel having a display aspect ratio optimized based upon the horizontal dimension of the field of view of the infrared sensor such that the display aspect ratio decreases as the horizontal field of view narrows.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: July 14, 1998
    Assignee: Hughes Electronics
    Inventor: Alex L. Kormos
  • Patent number: 5780581
    Abstract: An adhesive is provided for bonding cyanate ester composite parts together which is also plateable with metal once chemically etched. The adhesive comprises a polymeric matrix and a filler of cyanate ester polymer. The polymeric matrix comprises at least one polyepoxide resin and a curing agent, while the cyanate ester polymer filler is present in the adhesive as a powder. In practice, the present adhesive is applied to the surface of cyanate ester composite articles to be bonded and is allowed to cure at room temperature. Thereafter, the surface of the assembly is chemically etched and then plated with metal. The present adhesive enable the complete coverage of the cyanate ester composite assembly with the plated metal, including the adhesive bondlines.
    Type: Grant
    Filed: October 27, 1995
    Date of Patent: July 14, 1998
    Assignee: Hughes Aircraft Company
    Inventors: Ralph D. Hermansen, Brian M. Punsly, Wai-Cheng Seetoo
  • Patent number: 5770269
    Abstract: An article includes a substrate having a thermal control coating formed of 1 part by weight of a silicone polymeric matrix having from about 3 to about 4 parts by weight aluminum-doped zinc oxide pigment particles distributed therein. The article may be either relatively thick or flexibly thin, and the coating may be greater than 0.0015 inches thick so as to have a low solar absorptance. The coating has an absorptance of about 0.2-0.3 and an emittance of about 0.9, and is sufficiently electrically conductive to dissipate electrostatic charges.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: June 23, 1998
    Assignee: Hughes Aircraft Company
    Inventors: Lynn E. Long, Joan L. Lum
  • Patent number: 5768109
    Abstract: A multi-layer circuit board (11) has a cofired ceramic with a configuration of circuit traces (27) extending though differing layers of the multi-layer circuit board (11) to facilitate mountable conductive contact with semiconductor flip chips (13). Via holes (23) are precisely formed in the multi-layer circuit board (11) and are filled with solder or conductive epoxy. Semiconductor chips (13) have an array of metallic posts (19) alignable with the holes (23) and are mounted upon the upper surface of the multi-layer circuit board (11) in plug fashion. An aperture (25) may be formed in multi-layer circuit board (11) directly below each semiconductor chip (13) for protection of the circuitry on semiconductor chip (13) from contact with multi-layer circuit board (11). The via holes (23) and transmission line structure of the circuit board (11) are precisely formed to achieve a desired characteristic impedance.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: June 16, 1998
    Assignee: Hughes Electronics
    Inventors: Jon J. Gulick, Craig K. Shoda
  • Patent number: 5763118
    Abstract: A battery system includes a battery cell having a battery cell housing, and a housing support external to the battery cell housing. The housing support is formed of at least two split shell segments. Each split shell segment includes a heat conductor inner layer having a plurality of heat-conducting fibers with heat sink ends, and a structural support outer layer overlying the heat conductor inner layer. The structural support layer is made of a fiber-reinforced composite material. A layer of a structural adhesive bonds the respective heat conductor inner layer of each split shell segment to the battery cell housing. A thermal sink is in thermal contact with the sink ends of the plurality of heat-conducting fibers of each of the split shell segments, and the structural support outer layer of each split shell segment is joined to a structural base.
    Type: Grant
    Filed: May 9, 1996
    Date of Patent: June 9, 1998
    Assignee: Hughes Aircraft Company
    Inventors: John P. Stafford, Walter Rex Oswald, Susan K. Ferer, Matt H. Russell, Patrick B. Cooke, Michael Langmack, Robert K. Taenaka
  • Patent number: 5760667
    Abstract: A bandpass filter having 4-degrees of freedom includes a plurality of resonant cavities having respective Qs where at least one of the Qs is different. A plurality of main couplings couple successive resonant cavities to establish a main signal path that provides a first degree of freedom for controlling the shape of the filter's frequency response over its passband. A plurality of bridge couplings couple pairs of the resonant cavities so that the cavities are connected in a canonical circuit topology. The bridge couplings provide second and third degrees of freedom for controlling the sharpness of the frequency response 's transition between its passband and stopband and controlling the linearity of its phase, respectively. The cavities' non-uniform Qs provide a fourth degree of freedom for controlling the amplitude of the filter's frequency response in the passband so that the amplitude is within a predetermined tolerance of a desired passband shape.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: June 2, 1998
    Assignee: Hughes Aircraft Co.
    Inventors: Frederick A. Young, Richard L. Bennett, Keith N. Loi
  • Patent number: 5756160
    Abstract: The present invention comprises a method for protecting carbon composite materials from edge or surface damage during handling and manufacturing. The method comprises forming a protective silicon coating on selected surfaces of the carbon composite material to by forming a silicon bearing suspensoid coating on the surface of the carbon composite to be protected, and drying the suspensoid to a solid. In one embodiment, the suspensoid is formed by dissolving sodium silicate in water which is then mixed with an acid salt to form an irreversible gel. The suspensoid is either formed and then deposited on a surface area or formed in place through interactions between surface coatings of the separate compounds. The irreversible gel can be heated to remove the water and form a solid protective coating from the suspensoid.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: May 26, 1998
    Assignee: Hughes Aircraft
    Inventor: Wilson N. Pratt
  • Patent number: 5753087
    Abstract: A corona discharge pollutant destruction reactor employs two or more electrodes to enhance the effective corona discharge treatment volume by distributing a varying electric field pattern over the reactor's interior chamber. Appropriate delay circuitry allows the inner electrodes to be driven out of phase with each other by a sinusoidal voltage waveform, or corona producing voltage pulses to be cyclically supplied to the inner electrodes in sequence, preferably without overlapping the pulses.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: May 19, 1998
    Assignee: Hughes Electronics
    Inventors: John H. S. Wang, Weldon S. Williamson, Nelson William Sorbo, Franklin A. Dolezal
  • Patent number: 5754009
    Abstract: An interfacing system adapted for use with integrated circuits and accompanying devices. The inventive system includes an array of field emissive devices (36) which emit an electrons in response to input signals from multiple first circuits (14) on a first substrate (16). The field emissive devices (36) are located on the first substrate (16). An array of detectors (38) on a second substrate (20) receive the electrons across a (gap (42) between the first substrate (16) and the second substrate (20). A potential difference in response to a source of potential (22) between the first substrate (16) and the second substrate (20) accelerates the electrons across the vacuum gap (42). The interfacing system (10) may be constructed with a diameter of less than ten micrometers. Hence, two substrates with multiple circuits may be interfaced with many thousands of parallel connections per square centimeter without the need for multiplexing.
    Type: Grant
    Filed: September 19, 1995
    Date of Patent: May 19, 1998
    Assignee: Hughes Electronics
    Inventor: Robert Stephen Hayes
  • Patent number: 5748241
    Abstract: A method for residual coding of model failure regions in compressed video sequences in which a database of residuals for previous model failures is maintained at both the encoder and the decoder. The residuals for each determined model failure regions are compared with the residuals for previous model failures for the same region. In the event a current residual is identified in the database, only the index to the residual in the database needs to be sent. An additional residual taken after the model failure region has been partially corrected with a current residual identified in the database may also be transmitted. This mode provides increased quality at reduced bit rates by maximizing the utilization of previously transmitted or stored data. The process continuously updates the database at both the encoder and decoder when the current residual is not found. The process uses residuals of residuals to provide increased quality of reduced bit rates.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: May 5, 1998
    Assignee: HE Holdings, Inc.
    Inventors: Ronnie R. Burns, Ram Nagarajan
  • Patent number: 5748264
    Abstract: An image-projection display (10) includes a combiner (12) which is transparent to allow a view therethrough, and which is also at least partially reflective so that an image projected onto a surface of the combiner is reflected to a viewer. The display apparatus includes off-axis projection factors so that a rectilinear projected image would be perceived by the viewer as being distorted. A projector portion (20) of the display (10) includes an image source (36, 38) and a corrector element (46), as well as means (38, 46) for physically dislocating pixel elements of a rectilinear image so that the image as projected is de-linearized with compensatory distortion causing the image viewed by the viewer to be perceived with restored rectilinearity.
    Type: Grant
    Filed: January 10, 1995
    Date of Patent: May 5, 1998
    Assignee: Hughes Electronics
    Inventor: Ronald G. Hegg
  • Patent number: 5745518
    Abstract: An explosively pumped laser module has a concentrically-arranged laser rod and surrounding sleeve of explosive material with an annular gas chamber formed between the explosive sleeve and laser rod. An explosive initiation assembly surrounds the explosive sleeve with a plurality of detonator points or pads positioned symmetrically about the explosive sleeve. The assembly is connected to a central firing device or detonator via equal length pathways between each detonator point and the central firing device, so that the explosive is simultaneously detonated at a plurality of different points.
    Type: Grant
    Filed: February 9, 1996
    Date of Patent: April 28, 1998
    Assignee: Hughes Missile Systems Company
    Inventor: Jaime Cuadros
  • Patent number: 5743325
    Abstract: A closed-loop heat pipe transport design for a deployment application having a flexible section which connects to a payload structure and a deployable structure. The flexible section folds over itself while the deployable structure is stowed. Upon rotation of the deployable structure around a predetermined axis, the flexible section unfolds, with a portion of the flexible section passing through the predetermined axis. When the deployable structure has completed its rotation and is fully deployed, the components of the flexible section will lie in substantially the same plane.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: April 28, 1998
    Assignee: Hughes Electronics
    Inventor: David B. Esposto
  • Patent number: 5742160
    Abstract: In a preferred embodiment, an apparatus for detecting the angular position, rotational speed, and/or acceleration of a rotatable member, including: an annular magnetic source circumferentially disposed on the rotatable member and rotatable therewith; a directional magnetometer having a toroidal core, disposed at a location in proximity to the magnetic source, with the rotatable member passing through the toroidal core, the directional magnetometer being oriented so as to detect the amplitude and/or change of amplitude of only a tangential magnetic flux field component of the magnetic source, and to provide outputs indicative thereof; and apparatus to receive the outputs and to determine therefrom the angular position, rotational speed, and/or acceleration of the rotatable member.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: April 21, 1998
    Assignee: Hughes Electronics
    Inventors: Roderick G. Bergstedt, Donald J. Schreiber, Thomas G. Klapheke, Russell C. Smith
  • Patent number: 5738309
    Abstract: A method and system of orienting a payload of an orbiting spacecraft (14) to maintain a desired pointing profile in the presence of orbit inclination. A cone (12) is determined which is traced in inertial space by a pitch axis of the payload to maintain the desired pointing profile throughout an orbit. A bias momentum vector of the spacecraft (14) is oriented at an attitude which lies along the cone (12). The attitude has a nonzero angle with respect to a plane spanned by an orbit normal vector and an equatorial normal vector. The payload is rotated about a single body-fixed axis perpendicular to the pitch axis to align the pitch axis along the cone (12). As a result, the desired pointing profile is maintained throughout the inclined orbit.
    Type: Grant
    Filed: February 28, 1996
    Date of Patent: April 14, 1998
    Assignee: Hughes Electronics
    Inventor: Richard A. Fowell
  • Patent number: 5736956
    Abstract: A coherent radar receiver that has pulse-to-pulse coherence using an unlocked voltage controlled oscillator, such as a Gunn voltage controlled oscillator. The present invention is a W-band, for example, bistatic receiver that uses a scanning sum channel antenna to scan the target, a downconverter for downconverting received alternating sum and difference pulse echoes from the bistatic illuminator to provide video signals, and processing circuits for processing the downconverted the video signals to precisely locate the null position on the target. A Fourier transform circuit, magnitude detector and a peak detection and centroid circuit are used to generate a voltage frequency control output signal that is applied to the voltage controlled oscillator or local oscillator that controls its frequency. An angle estimation algorithm is used that processes the video signals to locate the null offset from the center of a scan pattern generated by the antenna.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: April 7, 1998
    Assignee: Hughes Electronics
    Inventors: Thomas A. Kennedy, Kapriel V. Kirkorian, Robert A. Rosen
  • Patent number: 5737119
    Abstract: A thermal imaging device (10) receives thermal infrared radiation from a viewed scene and responsively provides a visible image replicating the viewed scene. The imaging device (10) has a main housing with an optical aperture (16) at which a lens assembly (12) is attached. The lens assembly (12) has a number of lenses (200, 204, 208, 212, 216) sequentially mounted within a cylindrical housing (146), and defining an optical axis (199). A field-of-view-change mechanism (228) allows a user to select a wide field of view or a narrow field of view. The field-of-view-change mechanism (228) includes a rotatable field-of-view (FOV) ring (226) which rotates a tumbler (210) with a pair of lenses (208, 212) mounted therein. The tumbler (210) is positioned between a first position providing a wide field of view and a second position providing a narrow field of view.
    Type: Grant
    Filed: September 6, 1995
    Date of Patent: April 7, 1998
    Assignee: Hughes Electronics
    Inventors: Gary Mladjan, Peter Menard