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Active imaging system with Faraday filter

Description: This invention is comprised of an active imaging system which has a low to medium powered laser transmitter and a receiver wherein the receiver includes a Faraday filter with an ultranarrow optical bandpass and a bare (nonintensified) CCD camera. The laser is locked in the vicinity of the passband of the Faraday filter. The system has high sensitivity to the laser illumination wile eliminating solar background.
Date: December 31, 1992
Creator: Snyder, J. J.
Partner: UNT Libraries Government Documents Department
open access

Analysis of hydrogen isotope mixtures

Description: Disclosed are an apparatus and a method for determining concentrations of hydrogen isotopes in a sample. Hydrogen in the sample is separated from other elements using a filter selectively permeable to hydrogen. Then the hydrogen is condensed onto a cold finger or cryopump. The cold finger is rotated as pulsed laser energy vaporizes a portion of the condensed hydrogen, forming a packet of molecular hydrogen. The desorbed hydrogen is ionized and admitted into a mass spectrometer for analysis.
Date: December 31, 1992
Creator: Villa-Aleman, E.
Partner: UNT Libraries Government Documents Department
open access

Anisotropic fiber alignment in composite structures

Description: High strength material composite structures are formed with oriented fibers to provide controlled anisotropic fibers. Fibers suspended in non-dilute concentrations (e.g., up to 20 volume percent for fibers having an aspect ratio of 20) in a selected medium are oriented by moving an axially spaced array of elements in the direction of desired fiber alignment. The array elements are generally perpendicular to the desired orientation. The suspension medium may also include sphere-like particles wh… more
Date: December 31, 1992
Creator: Graham, A. L.; Mondy, L. A. & Guell, D. C.
Partner: UNT Libraries Government Documents Department
open access

Apparatus and method for removing particulate deposits from high temperature filters

Description: The combustion of a fuel-air mixture is used to provide a high-temperature and high-pressure pulse of gaseous combustion products for the back-flush cleaning of ceramic filter elements contained in a barrier filter system and utilized to separate particulates from particulate-laden process gases at high temperature and high pressure. The volume of gaseous combustion products provided by the combustion of the fuel-air mixture is preferably divided into a plurality of streams each passing through… more
Date: December 31, 1992
Creator: Nakaishi, C. V.; Holcombe, N. T. & Micheli, P. L.
Partner: UNT Libraries Government Documents Department
open access

Apparatus for preparing a sample for mass spectrometry

Description: Disclosed is an apparatus for preparing a sample for analysis by a mass spectrometer system. The apparatus has an entry chamber and an ionization chamber separated by a skimmer. A capacitor having two space-apart electrodes followed by one or more ion-imaging lenses is disposed in the ionization chamber. The chamber is evacuated and the capacitor is charged. A valve injects a sample gas in the form of sample pulses into the entry chamber. The pulse is collimated by the skimmer and enters the io… more
Date: December 31, 1992
Creator: Villa-Aleman, E.
Partner: UNT Libraries Government Documents Department
open access

An apparatus for remotely handling components

Description: The inventive apparatus for remotely handling barlike components which define a longitudinal direction includes a gripper mechanism for gripping the component including first and second gripper members longitudinally fixedly spaced from each other and oriented parallel to each other in planes transverse to the longitudinal direction. Each gripper member includes a jaw having at least one V-groove with opposing surfaces intersecting at a base and extending radially relative to the longitudinal d… more
Date: December 31, 1992
Creator: Szkrybalo, G. A. & Griffin, D. L.
Partner: UNT Libraries Government Documents Department
open access

Articles including thin film monolayers and multilayers

Description: This invention pertains to thin film assemblies or devices useful as sensors, nonlinear optical materials, and trace material scavengers. It claims a base substrate having an oxide surface layer, and a multidentate ligand, capable of binding a metal ion, attached to the oxide surface layer of the base substrate. A metal species may be provided attached to the ligand, and a multifunctional organic ligand may be provided attached to the metal species. A second metal species may be provided attach… more
Date: December 31, 1992
Creator: Li, DeQuan & Swanson, B. I.
Partner: UNT Libraries Government Documents Department
open access

Audible radiation monitor

Description: This invention consists of a method and apparatus for monitoring ionizing radiation comprising radiation detectors in electrical connection with an isotopic analyzer and a device for producing chords to which each isotope is mapped so that the device produces a unique chord for each isotope. Preferably the chords are pleasing to the ear, except for chords representing unexpected isotopes, and are louder or softer depending on the level of radioactivity produced by each isotope, and musical inst… more
Date: December 31, 1992
Creator: Odell, D.M.C.
Partner: UNT Libraries Government Documents Department
open access

Ballistic impulse gauge

Description: This invention is comprised of a gauge for detecting the impulse generated in sample materials by X-rays or other impulse producing mechanisms which utilizes a pair of flat annular springs to support a plunger relative to a housing which may itself be supported by a pair of flat annular springs in a second housing. The plunger has a mounting plate mounted on one end and at the other, a position or velocity transducer is mounted. The annular springs consist of an outer ring and an inner ring wit… more
Date: December 31, 1992
Creator: Ault, S. K.
Partner: UNT Libraries Government Documents Department
open access

Bioremediation of contaminated groundwater

Description: The present invention relates to a method for in situ bioremediation of contaminated soil and groundwater. In particular, the invention relates to remediation of contaminated soil and groundwater by the injection of nutrients to stimulate growth of pollutant-degrading microorganisms. The United States Government has rights in this invention pursuant to Contract No. DE-AC09-89SR18035 between the US Department of Energy and Westinghouse Savannah River Company.
Date: December 31, 1992
Creator: Hazen, T. C. & Fliermans, C. B.
Partner: UNT Libraries Government Documents Department
open access

Catalyzed enzyme electrodes

Description: An enzyme electrode is prepared with a composite coating on an electrical conductor. The composite coating is formed from a casting solution of a perfluorosulfonic acid, polymer, an enzyme, and a carbon supported catalyst. The solution may be cast directly on the conductor surface or may be formed as a membrane and applied to the surface. The perfluorosulfonic acid ionomer formed from the casting solution provides an insoluble biocompatible protective matrix for the enzyme and acts to retain th… more
Date: December 31, 1992
Creator: Zawodzinski, T. A.; Wilson, M. S.; Rishpon, J. & Gottesfeld, S.
Partner: UNT Libraries Government Documents Department
open access

Chemical vapor infiltration using microwave energy

Description: This invention is comprised of a method for producing reinforced ceramic composite articles by means of chemical vapor infiltration and deposition in which an inverted temperature gradient is utilized. Microwave energy is the source of heat for the process.
Date: December 31, 1992
Creator: Devlin, D. J.; Currier, R. P.; Laia, J. R. & Barbero, R. S.
Partner: UNT Libraries Government Documents Department
open access

A coal-water slurry fueled internal combustion engine and method for operating same

Description: An internal combustion engine fueled with a coal-water slurry is described. About 90 percent of the coal-water slurry charge utilized in the power cycle of the engine is directly injected into the main combustion chamber where it is ignited by a hot stream of combustion gases discharged from a pilot combustion chamber of a size less than about 10 percent of the total clearance volume of main combustion chamber with the piston at top dead center. The stream of hot combustion gases is provided by… more
Date: December 31, 1992
Creator: McMillian, M.H.
Partner: UNT Libraries Government Documents Department
open access

Cobalt carbonyl catalyzed olefin hydroformylation in supercritical carbon dioxide

Description: A method of olefin hydroformylation is provided wherein an olefin reacts with a carbonyl catalyst and with reaction gases such as hydrogen and carbon monoxide in the presence of a supercritical reaction solvent, such as carbon dioxide. The invention provides higher yields of n-isomer product without the gas-liquid mixing rate limitation seen in conventional Oxo processes using liquid media.
Date: December 31, 1992
Creator: Rathke, Jerome W. & Klingler, Robert J.
Partner: UNT Libraries Government Documents Department
open access

Compact self-contained electrical-to-optical converter/transmitter

Description: An electrical-to-optical converter/transmitter is disclosed. A first optical receiver and a second optical receiver are provided for receiving a calibrate command and a power switching signal, respectively, from a remote processor. A third receiver is provided for receiving an analog electrical signal from a transducer. A calibrator generates a reference signal in response to the calibrate command. A combiner mixes the electrical signal with the reference signal to form a calibrated signal. A c… more
Date: December 31, 1992
Creator: Seligmann, D. A.; Moss, W. C.; Valk, T. C. & Conder, A. D.
Partner: UNT Libraries Government Documents Department
open access

Crack detection using resonant ultrasound spectroscopy

Description: This invention is comprised of a method and apparatus for detecting crack-like flaws in components. A plurality of exciting frequencies are generated and applied to a component in a dry condition to obtain a first ultrasonic spectrum of the component. The component is then wet with a selected liquid to penetrate any crack-like flaws in the component. The plurality of exciting frequencies are again applied to the component and a second ultrasonic spectrum of the component is obtained. The wet an… more
Date: December 31, 1992
Creator: Migliori, A. & Bell, T.M.
Partner: UNT Libraries Government Documents Department
open access

Determination of actinides in urine and fecal samples

Description: A method of determining the radioactivity of specific actinides that are carried in urine or fecal sample material is disclosed. The samples are ashed in a muffle furnace, dissolved in an acid, and then treated in a series of steps of reduction, oxidation, dissolution, and precipitation, including a unique step of passing a solution through a chloride form anion exchange resin for separation of uranium and plutonium from americium.
Date: December 31, 1992
Creator: McKibbin, T.T.
Partner: UNT Libraries Government Documents Department
open access

Digitally controlled distributed phase shifter

Description: A digitally controlled distributed phase shifter is comprised of N phase shifters. Digital control is achieved by using N binary length-weighted electrodes located on the top surface of a waveguide. A control terminal is attached to each electrode thereby allowing the application of a control signal. The control signal is either one of two discrete bias voltages. The application of the discrete bias voltages change the modal index of a portion of the waveguide that corresponds to a length of th… more
Date: December 31, 1992
Creator: Hietala, V. M.; Kravitz, S. H. & Vawter, G. A.
Partner: UNT Libraries Government Documents Department
open access

DNA fragment sizing and sorting by laser-induced fluorescence

Description: A method is provided for obtaining DNA fingerprints using high speed detection systems, such as flow cytometry to determine unique characteristics of DNA pieces from a selected sample. In one characterization the DNA piece is fragmented at preselected sites to produce a plurality of DNA fragments. The DNA piece or the resulting DNA fragments are treated with a dye effective to stain stoichiometrically the DNA fragments. The fluorescence from the dye in the stained fragments is then examined to … more
Date: December 31, 1992
Creator: Jett, J. H.; Hammond, M. L.; Keller, R. A.; Marrone, B. L. & Martin, J. C.
Partner: UNT Libraries Government Documents Department
open access

Drill string enclosure

Description: This invention is comprised of a drill string enclosure which consists of six component parts, including; a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts. The upper acrylic cylinder is optional based upon the drill string length. The drill string enclosure allows for an efficient drill and sight operation at a hazardous waste site.
Date: December 31, 1992
Creator: Jorgensen, D. K.; Kuhns, D. J.; Wiersholm, O. & Miller, T. A.
Partner: UNT Libraries Government Documents Department
open access

Electrochemical sensor/detector system and method

Description: An electrochemical detection system is described comprising in combination: (a) a multielement, microelectrode array detector containing means for acquiring a plurality of signals; (b) electronic means for receiving said signals and converting said signals into a readout or display providing information with respect to the nature and concentration of elements present in a solution being tested. Also described is the means of making the above described microelectrode detector.
Date: December 31, 1992
Creator: Glass, R. S.; Perone, S. P.; Ciarlo, D. R. & Kimmons, J. F.
Partner: UNT Libraries Government Documents Department
open access

Electronic test circuitry

Description: Circuitry for testing the ability of an intermediate range nuclear instrument to detect and measure a constant current and a periodic current pulse. The invention simulates the resistance and capacitance of the signal connection of a nuclear instrument ion chamber detector and interconnecting cable. An LED flasher/oscillator illuminates an LED at a periodic rate established by a timing capacitor and circuitry internal to the flasher/oscillator. When the LED is on, a periodic current pulse is ap… more
Date: December 31, 1992
Creator: Brown, R. A.
Partner: UNT Libraries Government Documents Department
open access

Eliminating livelock in flushable routing networks

Description: This invention is comprised of a method for livelock-free message routing is provided in a network of interconnected nodes that is flushable in time T. An input message processor generates sequences of at least N time intervals, each of duration T. An input register provides for receiving and holding each input message, where the message is assigned a priority state p during an nth one of the N time intervals. At each of the network nodes a message processor reads the assigned priority state an… more
Date: December 31, 1992
Creator: Faber, V.
Partner: UNT Libraries Government Documents Department
open access

Enhanced radiation resistant fiber optics

Description: A process for producing an optical fiber having enhanced radiation resitance is provided, the process including maintaining an optical fiber within a hydrogen-containing atmosphere for sufficient time to yield a hydrogen-permeated optical fiber having an elevated internal hydrogen concentration, and irradiating the hydrogen-permeated optical fiber at a time while the optical fiber has an elevated internal hydrogen concentration with a source of ionizing radiation. The radiation source is typica… more
Date: December 31, 1992
Creator: Lyons, P. B. & Looney, L. D.
Partner: UNT Libraries Government Documents Department
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