Patents Represented by Attorney W. H. MacAllister
  • Patent number: 4385085
    Abstract: Inorganic-organic composites suitable for use as separators in alkaline storage batteries requiring gas permeability, thermal stability, chemical stability and good structural strength and a process for making them are disclosed. The composites are more thermally stable than prior art separator materials, retain aqueous alkaline electrolytes well and are chemically resistant to 31% KOH solutions at 110.degree. C.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: May 24, 1983
    Assignee: Hughes Aircraft Company
    Inventor: Scott A. Verzwyvelt
  • Patent number: 4380056
    Abstract: This invention improves production yield and charge transfer speed and efficiency at the detector/register interface in a focal plane array and includes a novel meander channel CCD serial register in which charge packets generated in the array are stored. The electrode edge length across which charge is transferred at each entrance to the serial register is substantially increased in this invention in comparison with the prior art, resulting in a significant improvement in charge transfer efficiency and layout simplicity. Furthermore, this invention provides symmetrical surface potential distribution, and eliminates the gap instability in charge transfer.
    Type: Grant
    Filed: February 20, 1981
    Date of Patent: April 12, 1983
    Assignee: Hughes Aircraft Company
    Inventors: William J. Parrish, Christopher L. Fletcher
  • Patent number: 4376710
    Abstract: Solid self-lubricating composites comprising carbon or graphite fiber preforms reinforced with high temperature resins and self-lubricating pigments are disclosed which withstand very high loads at very high temperatures.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: March 15, 1983
    Assignee: Hughes Aircraft Company
    Inventors: Michael N. Gardos, Arturo A. Castillo
  • Patent number: 4374291
    Abstract: Bis(ethynylphenyl) compounds are prepared by an improved synthesis process which increases yield and is suitable for large scale synthesis operations. Aromatic dianilines are diazotized to form aromatic halides that are subsequently coupled with an end-protecting group having acetylenic moieties. The end-protecting groups are subsequently removed leaving the desired diethynyl derivative in quantitative yields.
    Type: Grant
    Filed: November 6, 1981
    Date of Patent: February 15, 1983
    Assignee: Hughes Aircraft Company
    Inventor: Kreisler S. Y. Lau
  • Patent number: 4373282
    Abstract: A device for illuminating a display surface. Light is introduced through an end surface of a transparent substrate having front and back plane parallel opposed surfaces and thereby directed into the interior of the substrate. The back surface is textured with a multiplicity of shallow depressions such as grooves or dimples which have shallow sloped sides. These sides are configured so that light is selectively directed from the interior of the substrate through a limited angle out of the substrate towards a display surface adjacent and coextensive with the back surface of the substrate and away from a viewer observing the display surface through the substrate. The device provides uniform, high contrast illumination of underlying large area graphic displays such as maps, photographs, charts, and the like.
    Type: Grant
    Filed: May 29, 1981
    Date of Patent: February 15, 1983
    Assignee: Hughes Aircraft Company
    Inventor: Robert Wragg
  • Patent number: 4372037
    Abstract: A ceramic substrate includes a multiplicity of alternately screened and fired conductor and dielectric levels, with interconnections between levels through small via holes in the dielectric layers or alternately by means of crossovers. Thick film resistors are incorporated throughout the ceramic substrate, wherever needed, and the thick film resistors are printed and trimmed through windows which extend through any upper layers. In addition, resistors may be printed directly on top of the dielectric layers where necessary. Selective area hermetic sealing is utilized only for those chips and wire bonds which require environmental protection by placement of a ring frame seal encircling the selected area and over insulation on substrate conductors which are routed directly beneath the sealing area. A lid is directly soldered to the frame and, before final sealing, a proper environment is created within a sealed area.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: February 8, 1983
    Assignee: Hughes Aircraft Company
    Inventors: Robert Y. Scapple, Frank Z. Keister, Robert G. Grieger, Richard P. Himmel
  • Patent number: 4372639
    Abstract: A method and apparatus for presenting real-time information for viewing is disclosed wherein a projection lens projects an image of a liquid crystal display onto the surface of a holographic optical element diffuser. The liquid crystal display is driven so as to contain real-time information and is illuminated by substantially monochromatic light. The diffuser diffracts the real-time information to a pupil at a viewing focal plane with preselected illumination intensity so that the real-time information can be viewed in diffuse form anywhere across the pupil.
    Type: Grant
    Filed: June 3, 1981
    Date of Patent: February 8, 1983
    Assignee: Hughes Aircraft Company
    Inventor: Kenneth C. Johnson
  • Patent number: 4371845
    Abstract: A power divider/combiner assembly is provided which matches the impedance seen at the input/output port with the impedance seen at the peripheral end of each of plural radial transmission lines. Impedance matching is accomplished through the use of an inverted microstrip on a substrate suspended over an air dielectric. The thickness of the air dielectric is varied along each transmission line in discrete steps from the common dividing/combining end to the peripheral end of each transmission line. The air dielectric thickness can be chosen independently for each section of line so that a characteristic impedance of from 40 ohms to greater than 130 ohms is achieved.
    Type: Grant
    Filed: June 15, 1981
    Date of Patent: February 1, 1983
    Assignee: Hughes Aircraft Company
    Inventor: Octavius Pitzalis, Jr.
  • Patent number: 4370501
    Abstract: A simplified process for converting bis-phenols to dianilines is disclosed. Selected catalytic complexes are used to cause a nucleophilic displacement reaction between a bis-phenol and a quinazoline to occur thereby yielding a bis-quinazoline that may be subsequently converted into a bis-quinazolinone and hydrolyzed to form the desired dianiline.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: January 25, 1983
    Assignee: Hughes Aircraft Company
    Inventor: Kreisler S. Y. Lau
  • Patent number: 4369445
    Abstract: A video processor that responds to the video signals received from a group of radar receivers to automatically select the video that is least affected by ECM environment in which the receivers operate. Each receiver in the group has known ECM characteristics so that the effect of different forms of ECM on its video output signals may be detected. By continually monitoring the video output signals different receivers are continually selected to minimize the effect of ECM environment on the radar operation.
    Type: Grant
    Filed: March 23, 1966
    Date of Patent: January 18, 1983
    Assignee: Hughes Aircraft Company
    Inventors: Norol T. Evans, Robert B. Nelson
  • Patent number: 4369212
    Abstract: A process is provided for removing contaminating residues left behind during fabrication of gas electrodes employed in metal/gas batteries, e.g., nickel/hydrogen batteries, and fuel cells employing gas electrodes. Such residues arise from depositing and sintering on a conductive, screen-type electrode substrate a platinum powder/polytetrafluoroethylene powder mixture containing a suspending agent. The residues of the suspending agent are removed by contacting the fabricated electrode with a solvent mixture comprising a first solvent, e.g., trichloroethylene, for dissolving the residues and a second solvent, e.g., ethanol, for wetting the polytetrafluoroethylene.
    Type: Grant
    Filed: October 20, 1980
    Date of Patent: January 18, 1983
    Assignee: Hughes Aircraft Company
    Inventors: Howard H. Rogers, Steven J. Stadnick
  • Patent number: 4367911
    Abstract: Assembly 10 is formed of base and cover plates 12 and the 16 with dichromated gelatin holographic exposure layer 20 therebetween. Liquid monomer is placed in the assembly and is polymerized to solid polymer layer 22 to form a solid assembly for holographic exposure of dichromated gelatin layer 20. After exposure, heating permits removal of cover plate 16 and polymer layer 22 for subsequent development of the latent image in dichromated gelatin holographic exposure layer 20.
    Type: Grant
    Filed: July 14, 1980
    Date of Patent: January 11, 1983
    Assignee: Hughes Aircraft Company
    Inventor: Andrejs Graube
  • Patent number: 4368215
    Abstract: The specification describes a process for masking a collimated ion beam for either forming resist patterns on selected substrates or for other selective ion implantation purposes. This process includes the steps of forming an ion absorption mask on the surface of a hyper thin supporting membrane and thereafter aligning the mask with a substrate having a layer of resist thereon. Next, the ion absorption mask is exposed to a beam of ions which pass through certain areas of the absorption mask and into the resist layer to thereby expose selected regions in the resist layer (i.e., to increase or decrease the solubility of the resist to a chosen developer). In a specific embodiment of the invention, the ion absorption mask is formed by initially anodizing an aluminum substrate to form a thin coating of aluminum oxide thereon, and thereafter depositing a gold mask on one surface of the aluminum oxide coating.
    Type: Grant
    Filed: January 21, 1981
    Date of Patent: January 11, 1983
    Assignee: Hughes Aircraft Company
    Inventor: Robert L. Seliger
  • Patent number: 4367429
    Abstract: Alloys suitable for use in liquid metal field ionization ion sources are provided. Such sources include an anode electrode for supporting an ion emitter comprising an alloy in the liquid state. The source further comprises means for generating an ionizing electric field and a reservoir for the liquid metal, ions of which are to be emitted by the source.The alloys are selected from the group consisting of (a) metal-metalloid alloys comprising about 10 to 30 atom percent of at least one metalloid element, the balance at least one transition metal element, (b) early transition-late transition alloys comprising about 30 to 85 atom percent of at least one early transition metal, the balance at least one late transition metal, and (c) Group II alloys comprising about 35 to 80 atom percent of at least one Group II element, the balance at least one metal element.Ions generated in liquid metal ion sources form a high brightness ion beam, which permits focusing a beam of emitted ions to a submicrometer spot.
    Type: Grant
    Filed: November 3, 1980
    Date of Patent: January 4, 1983
    Assignee: Hughes Aircraft Company
    Inventors: Victor Wang, Joseph A. Wysocki, Gregory L. Tangonan, Robert L. Seliger
  • Patent number: 4365664
    Abstract: Input and output tubes in an osmotically pumped heat pipe (10) are utilized to improve solvent-solute mixing and sweeping across a solvent-permeable membrane (46, 146, 246), to enable its operation in 0-g, 1-g and negative-g applications. Lean mixture solution flows through a path (16) of low pressure to an evaporator (14) where the solvent evaporates. Rich mixture solution from the evaporator then returns to the solvent-permeable membrane through a path (18) of higher pressure than the low pressure path to enable sweeping of the membrane and consequent increased mixing with the incoming condensed solvent.
    Type: Grant
    Filed: October 20, 1980
    Date of Patent: December 28, 1982
    Assignee: Hughes Aircraft Company
    Inventor: Algerd Basiulis
  • Patent number: 4363834
    Abstract: Substrates prepared from chemically inert organic fibers that are non-wettable are rendered wettable by mechanically attached coatings of hydrophilic inorganic particles. The resulting inorganic-organic composites are suitable for use as separators in alkaline storage cells.
    Type: Grant
    Filed: July 6, 1981
    Date of Patent: December 14, 1982
    Assignee: Hughes Aircraft Company
    Inventor: Scott A. Verzwyvelt
  • Patent number: 4362164
    Abstract: A stethoscope transducer applicable as a conventional audio transducer and as a phonocardiogram transducer has a body which on one side mounts an electrode carrying chest bell and which on an opposite side mounts a conventional chest bell. A microphone and a rotor assembly are mounted in a cavity in the body. The microphone and earpiece connections on the body communicate through passages in the rotor assembly with the electrode carrying chest bell when the rotor assembly is in a first position and with the conventional chest bell when the rotor assembly is rotated to a second position. These are three electrodes, two being pickup electrodes which each occupy one quadrant of the chest bell rim in diametrically opposite positions. The third electrode is on the rim intermediate the pickup electrodes. The rim is of a non-wettable material providing a hydrophobic surface.
    Type: Grant
    Filed: September 11, 1980
    Date of Patent: December 7, 1982
    Assignee: Hughes Aircraft Company
    Inventors: Michael J. Little, Shi-Yin Wong
  • Patent number: 4360745
    Abstract: The capacitance of a compensating reverse biased diode is added to the capacitance of a pn junction formed by surface depletion and inversion in a charge coupled device having variations in depletion capacitance which are to be compensated. Because the compensating diode is connected in an opposite sense with respect to the pn junction, an increase in small signal variations in the potential across the pn junction causes a decrease in small signal variations in the potential across the compensating diode. The resulting change in the capacitance of the pn junction is accompanied by a corresponding opposite change in the capacitance of the compensating diode so that the combined capacitance of the two elements remains nearly constant during all small signal variations in potential.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: November 23, 1982
    Assignee: Hughes Aircraft Company
    Inventor: Paul R. Prince
  • Patent number: 4360789
    Abstract: A very low current Pierce oscillator has two pairs of complementary field-effect transistors (FET's) and a two-terminal quartz crystal. The gates of the first complementary FET pair are coupled through individual capacitors to one terminal of the quartz crystal, their drains being connected together and to the other quartz crystal terminal. Current flow through the crystal oscillator is minimized by a novel oscillator bias loop connected between the gates of the first FET pair. Amplification is provided by the second FET pair which have a commonly connected drain comprising the oscillator output node. The gates of the second FET pair are each connected to a respective one of the gates of the first FET pair. The oscillator bias loop minimizes the source-to-drain current through the first FET pair by reducing the P-channel FET gate voltage in response to the source-to-drain current.
    Type: Grant
    Filed: July 17, 1980
    Date of Patent: November 23, 1982
    Assignee: Hughes Aircraft Company
    Inventors: Lanny L. Lewyn, Charles H. Lucas
  • Patent number: 4360811
    Abstract: A false alarm control processor that receives sampled input radar video data and provides an output signal having a zero mean value. The processor accumulates the sample video for a range sweep of range bins, then stores the value and resets a counter. The stored value is scaled to form an estimate of the mean and subtracted from the input video signals of the following sweep. To prevent the mean from being biased by strong targets, a target exclusion function may be included to prevent accumulation of video from strong targets. However, if the noise or jamming level has increased for more range bins than a target would occupy, the video is then sampled by the accumulator so that the mean is responsive to changes in the level of the noise. Thus, the system provides a constant false alarm rate and accurate azimuth estimation in the azimuth integrator filter as well as allowing the azimuth integrator to operate with a relatively small dynamic range.
    Type: Grant
    Filed: October 20, 1980
    Date of Patent: November 23, 1982
    Assignee: Hughes Aircraft Company
    Inventors: Thomas C. Cantwell, Jr., Richard D. Wilmot, Jack R. Ballantyne