Patents Represented by Attorney Judson R. Hightower
  • Patent number: 4870648
    Abstract: An x-ray beamsplitter which splits an x-ray beam into two coherent parts by reflecting and transmitting some fraction of an incident beam has applications for x-ray interferometry, x-ray holography, x-ray beam manipulation, and x-ray laser cavity output couplers. The beamsplitter is formed of a wavelength selective multilayer thin film supported by a very thin x-ray transparent membrane. The beamsplitter resonantly transmits and reflects x-rays through thin film interference effects. A thin film is formed of 5-50 pairs of alternate Mo/Si layers with a period of 20-250 A. The support membrane is 10-200 nm of silicon nitride or boron nitride. The multilayer/support membrane structure is formed across a window in a substrate by first forming the structure on a solid substrate and then forming a window in the substrate to leave a free-standing structure over the window.
    Type: Grant
    Filed: August 7, 1987
    Date of Patent: September 26, 1989
    Assignee: The United States Department of Energy
    Inventors: Natale M. Ceglio, Daniel S. Stearns, Andrew M. Hawryluk, Troy W. Barbee, Jr.
  • Patent number: 4870295
    Abstract: A pulse generator for characterizing semiconductor devices at millimeter wavelength frequencies where a photoconductive circuit element (PCE) is biased by a direct current voltage source and produces short electrical pulses when excited into conductance by short laser light pulses. The electrical pulses are electronically conditioned to improve the frequency related amplitude characteristics of the pulses which thereafter propagate along a transmission line to a device under test.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: September 26, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Christen Rauscher
  • Patent number: 4867951
    Abstract: An organic extracting solution and an extraction method useful for separating elements of the actinide series of the periodic table from elements of the lanthanide series, where both are in trivalent form. The extracting solution consists of a primary ligand and a secondary ligand, preferably in an organic solvent. The primary ligand is a substituted monothio-1,3-dicarbonyl, which includes a substituted 4-acyl-2-pyrazolin-5-thione, such as 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione (BMPPT). The secondary ligand is a substituted phosphine oxide, such as trioctylphosphine oxide (TOPO).
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: September 19, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Barbara F. Smith, Gordon D. Jarvinen, Robert R. Ryan
  • Patent number: 4867866
    Abstract: Municipal waste materials are processed by crushing the materials so that pieces of noncombustible material are smaller than a selected size and pieces of combustible material are larger than the selected size. The crushed materials are placed on a vibrating mesh screen conveyor belt having openings which pass the smaller, noncombustible pieces of material, but do not pass the larger, combustible pieces of material. Consecutive conveyors may be connected by an intermediate vibratory plate. An air knife can be used to further separate materials based on weight.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: September 19, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: John L. Mayberry
  • Patent number: 4867868
    Abstract: Pyritic sulfur is removed from coal or other carbonaceous material through the use of humic acid as a coal flotation depressant. Following the removal of coarse pyrite, the carbonaceous material is blended with humic acid, a pyrite flotation collector and a frothing agent within a flotation cell to selectively float pyritic sulfur leaving clean coal as an underflow.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: September 19, 1989
    Assignee: The United States of America as represented by the Department of Energy
    Inventors: Kenneth J. Miller, Wu-Wey Wen
  • Patent number: 4866147
    Abstract: Polymerization of acetylenic monomers is achieved by using a catalyst which is the reaction product of a tungsten compound and a reducing agent effective to reduce W(VI) to W(III and/or IV), e.g., WCl.sub.6.(organo-Li, organo-Mg or polysilane). The resultant silylated polymers are of heretofore unachievable high molecular weight and can be used as precursors to a wide variety of new acetylenic polymers by application of substitution reactions.
    Type: Grant
    Filed: September 22, 1986
    Date of Patent: September 12, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: John M. Zeigler
  • Patent number: 4863198
    Abstract: A split gland having only three parts is described. The gland has substantially the same stability to the relative motion of the constituent half-gland members during the attachment process to a female fitting as have more complicated designs. Ease of manufacture and use result from the reduction in complexity of the present invention.
    Type: Grant
    Filed: October 14, 1987
    Date of Patent: September 5, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Joseph J. Petranto
  • Patent number: 4864236
    Abstract: A device for uncovering imperfections in electrical conducting wire, particularly superconducting wire, by detecting variations in eddy currents. Eddy currents effect the magnetic field in a gap of an inductor, contained in a modified commercial ferrite core, through which the wire being tested is passed. A small increase or decrease in the amount of conductive material, such as copper, in a fixed cross section of wire will unbalance a bridge used to measure the impedance of the inductor, tripping a detector and sounding an alarm.
    Type: Grant
    Filed: August 31, 1982
    Date of Patent: September 5, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: George H. Gibson, Robert G. Smits, Philippe H. Eberhard
  • Patent number: 4861408
    Abstract: Treating polymer surfaces, e.g., Teflon, particularly very thin surfaces, e.g., 50-10,000 .ANG. with low energy electron radiation, e.g., 100-1000 eV, in a high vacuum environment, e.g., less than 10.sup.-6 Torr, to enhance the ability of the surface to be adhered to a variety of substrates.
    Type: Grant
    Filed: April 8, 1987
    Date of Patent: August 29, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Jeffry A. Kelber
  • Patent number: 4858529
    Abstract: A column of explosive in a low-voltage detonator which makes it spark-safe ncludes an organic secondary explosive charge of HMX in the form of a thin pad disposed in a bore of a housing of the detonator in an ignition region of the explosive column and adjacent to an electrical ignition device at one end of the bore. The pad of secondary charge has an axial thickness within the range of twenty to thirty percent of its diameter. The explosive column also includes a first explosive charge of CP disposed in the housing bore in the ignition region of the explosive column next to the secondary charge pad on a side opposite from the ignition device. The first CP charge is loaded under sufficient pressure, 25 to 40 kpsi, to provide mechanical confinement of the pad of secondary charge and physical coupling thereof with the ignition device.
    Type: Grant
    Filed: July 1, 1988
    Date of Patent: August 22, 1989
    Assignee: The United States of America as represented by the Department of Energy
    Inventor: Morton L. Lieberman
  • Patent number: 4858817
    Abstract: The present invention is directed to a process of brazing a ceramic mater to graphite. In particular, the brazing procedure is directed to the production of a novel brazed ceramic graphite product useful as a Faraday shield.
    Type: Grant
    Filed: May 5, 1983
    Date of Patent: August 22, 1989
    Assignee: The United States of America as represented by the Department of Energy
    Inventors: David L. Hwang, Joel C. Hosea
  • Patent number: 4858441
    Abstract: A heat-driven acoustic cooling engine having no moving parts receives heat from a heat source. The acoustic cooling engine comprises an elongated resonant pressure vessel having first and second ends. A compressible fluid having a substantial thermal expansion coefficient and capable of supporting an acoustic standing wave is contained in the resonant pressure vessel. The heat source supplies heat to the first end of the vessel. A first heat exchanger in the vessel is spaced-apart from the first end and receives heat from the first end. A first thermodynamic element is adjacent to the first heat exchanger and converts some of the heat transmitted by the first heat exchanger into acoustic power. A second thermodynamic element has a first end located spaced-apart from the first thermodynamic element and a second end farther away from the first thermodynamic element than is its first end. The first end of the second thermodynamic element heats while its second end cools as a consequence of the acoustic power.
    Type: Grant
    Filed: January 21, 1988
    Date of Patent: August 22, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: John C. Wheatley, Gregory W. Swift, Albert Migliori, Thomas J. Hofler
  • Patent number: 4859054
    Abstract: A proximity fuze system includes an optical ranging apparatus, a detonation circuit controlled by the optical ranging apparatus, and an explosive charge detonated by the detonation cirtcuit. The optical ranging apparatus includes a pulsed laser light source for generating target ranging light pulses and optical reference light pulses. A single lens directs ranging pulses to a target and collects reflected light from the target. An optical fiber bundle is used for delaying the optical reference pulses to correspond to a predetermined distance from the target. The optical ranging apparatus includes circuitry for providing a first signal depending upon the light pulses reflected from the target, a second signal depending upon the light pulses from the optical delay fiber bundle, and an output signal when the first and second signals coincide with each other. The output signal occurs when the distance from the target is equal to the predetermined distance form the target.
    Type: Grant
    Filed: July 10, 1987
    Date of Patent: August 22, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Thomas R. Harrison
  • Patent number: 4858476
    Abstract: A sampling apparatus is provided which comprises a sampler for sampling air in the breathing zone of a wearer of the apparatus and a support for the sampler preferably in the form of a pair of eyeglasses. The sampler comprises a sampling assembly supported on the frame of the eyeglasses and including a pair of sample transport tubes which are suspended, in use, centrally of the frame so as to be disposed on opposite sides of the nose of the wearer and which each include an inlet therein that, in use, is disposed adjacent to a respective nostril of the nose of the wearer. A filter holder connected to sample transport tubes supports a removable filter for filtering out particulate material in the air sampled by the apparatus. The sample apparatus is connected to a pump for drawing air into the apparatus through the tube inlets so that the air passes through the filter.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: August 22, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: John Tobin
  • Patent number: 4857266
    Abstract: A composition of matter comprised of copper and particles which are dispersed throughout the copper, where the particles are comprised of copper oxide and copper having a coating of copper oxide, and a method for making this composition of matter.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: August 15, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Haskell Sheinberg, Thomas T. Meek, Rodger D. Blake
  • Patent number: 4857740
    Abstract: A wire chamber or proportional counter device, such as Geiger-Mueller tube or drift chamber, improved with a gas mixture providing a stable drift velocity while eliminating wire aging caused by prior art gas mixtures. The new gas mixture is comprised of equal parts argon and ethane gas and having approximately 0.25% isopropyl alcohol vapor.
    Type: Grant
    Filed: May 12, 1987
    Date of Patent: August 15, 1989
    Assignee: The United States of American as represented by the United States Department of Energy
    Inventor: Muzaffer Atac
  • Patent number: 4857739
    Abstract: A personal radiation monitor of the chirper type is provided for detecting ionizing radiation. A battery powered high voltage power supply is used to generate and apply a high voltage bias to a G-M tube radiation sensor. The high voltage is monitored by a low-loss sensing network which generates a feedback signal to control the high voltage power supply such that the high voltage bias is recharged to +500 VDC when the current pulses of the sensor, generated by the detection of ionizing radiation events, discharges the high voltage bias to +450 VDC. During the high voltage recharge period an audio transducer is activated to produce an audible "chirp". The rate of the "chirps" is controlled by the rate at which the high voltage bias is recharged, which is proportional to the radiation field intensity to which the sensor is exposed. The chirp rate sensitivity is set to be approximately 1.5 (chirps/min/MR/hr.).
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: August 15, 1989
    Assignee: United States Department of Energy
    Inventor: James E. Phelps
  • Patent number: 4855030
    Abstract: An apparatus for removing dendrites or other crystalline matter from the surface of a liquid in a matter transport process, and an electrolytic cell including such an apparatus. A notch may be provided to allow continuous exposure of the liquid surface, and a bore may be further provided to permit access to the liquid.
    Type: Grant
    Filed: June 7, 1988
    Date of Patent: August 8, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: William E. Miller
  • Patent number: H669
    Abstract: The present invention covers a new radiation source, samarium-145, with radiation energies slightly above those of I-125 and a half-life of 340 days. The samarium-145 source is produced by neutron irradiation of SM-144. This new source is useful as the implanted radiation source in photon activation therapy of malignant tumors to activate the stable I-127 contained in the IdUrd accumulated in the tumor, causing radiation sensitization and Auger cascades that irreperably damage the tumor cells. This new source is also useful as a brachytherapy source.
    Type: Grant
    Filed: December 8, 1986
    Date of Patent: September 5, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Ralph G. Fairchild, Brenda H. Laster, Samuel Packer
  • Patent number: H678
    Abstract: A system for transmitting low frequency analog signals over AC power lines using FM modulation. A low frequency analog signal to be transmitted is first applied to a voltage-to-frequency converter where it is converted to a signal whose frequency varies in proportion to the analog signal amplitude. This signal is then used to modulate the carrier frequency of an FM transmitter coupled to an AC power line. The modulation signal frequency range in selected to be within the response band of the FM transmitter. The FM modulated carrier signal is received by an FM receiver coupled to the AC power line, demodulated and the demodulated signal frequency is converted by a frequency-to-voltage converter back to the form of the original low frequency analog input signal.
    Type: Grant
    Filed: July 30, 1987
    Date of Patent: September 5, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Steven P. Baker, Robert L. Durall, Howard D. Haynes