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Phosphazene polymer containing composites and method for making phosphazene polymer containing composites

Description: The object of the invention is to provide a composite material comprised of phosphazene polymer. A feature of phosphazene-containing composites is their superior stiffness, thermal stability, and hardness which is lacking in more typical composite constituents. An advantage of using phosphazene composites is a wider range of applications, including uses in harsh environments. Another object of the present invention provides a method for producing phosphazene-containing composite materials throu… more
Date: December 31, 1990
Creator: Allen, C. A.; Grey, A. E.; McCaffrey, R. R.; Simpson, B. M. & Stone, M. L.
Partner: UNT Libraries Government Documents Department
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A method for joining ceramic shapes

Description: The invention is a method for joining shapes of ceramic materials together to form a unitary ceramic structure. In the method of the invention, a mixture of two or more chemical components which will react exothermically is placed between the surfaces to be joined, and the joined shapes heated to a temperature sufficient to initiate the exothermic reaction forming a joining material which acts to bond the shapes together. Reaction materials are chosen which will react exothermically at temperat… more
Date: December 31, 1990
Creator: Rabin, B. H.
Partner: UNT Libraries Government Documents Department
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Apparatus and method for separating constituents

Description: A centrifugal separator apparatus and method for improving the efficiency of the separation of constituents in a fluid stream. A cyclone separator includes an assembly for separately discharging both constituents through the same end of the separator housing. A rotary separator includes a rotary housing having a baffle disposed therein for minimizing the differential rotational velocities of the constituents in the housing, thereby decreasing turbulence, and increasing efficiency. The intensity… more
Date: December 31, 1990
Creator: Maronde, C. P. & Killmeyer, R. P., Jr.
Partner: UNT Libraries Government Documents Department
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Plenum type crystal growth chamber

Description: Crystals are grown in a tank which is divided by a baffle into a crystal growth region above the baffle and a plenum region below the baffle. A turbine blade or stirring wheel is positioned in a turbine tube which extends through the baffle to generate a flow of solution from the crystal growing region to the plenum region. The solution is pressurized as it flows into the plenum region. The pressurized solution flows back to the crystal growing region through return flow tubes extending through… more
Date: December 31, 1990
Creator: Montgomery, K. E.
Partner: UNT Libraries Government Documents Department
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Coherence delay augmented laser beam homogenizer

Description: It is an object of the present invention to provide an apparatus that can reduce the apparent coherence length of a laser beam so the beam can be used with an inexpensive homogenizer to produce an output beam with a uniform spatial intensity across its entire cross section. It is a further object of the invention to provide an improved homogenizer with a variable aperture size that is simple and easily made. It is still an additional object of the invention to provide an improved liquid filled … more
Date: December 31, 1991
Creator: Rasmussen, P. & Bernhardt, A.
Partner: UNT Libraries Government Documents Department
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Process to remove rare earth from IFR electrolyte

Description: The invention is a process for the removal of rare earths from molten chloride electrolyte salts used in the reprocessing of integrated fast reactor fuel (IFR). The process can be used either continuously during normal operation of the electrorefiner or as a batch process. The process consists of first separating the actinide values from the salt before purification by removal of the rare earths. After replacement of the actinides removed in the first step, the now-purified salt electrolyte has… more
Date: January 1, 1992
Creator: Ackerman, J. P. & Johnson, T. R.
Partner: UNT Libraries Government Documents Department
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[Letters Patent for Flutter Wheels]

Description: Letters patent granting rights to James Stewart for an improvement to flutter wheels used to drive gins, mills, and other machinery.
Date: October 24, 1828
Creator: United States. Patent Office.
Partner: UNT Libraries Special Collections
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Phase stable rf transport system

Description: This invention is comprised of an RF transport system which delivers a phase-stable RF signal to a load, such as an RF cavity of a charged particle accelerator. A circuit generates a calibration signal at an odd multiple frequency of the RF signal where the calibration signal is superimposed with the RF signal on a common cable that connects the RF signal with the load. Signal isolating diplexers are located at both the RF signal source end and load end of the common cable to enable the calibra… more
Date: February 19, 1991
Creator: Curtin, M. T.; Natter, E. F. & Denney, P. M.
Partner: UNT Libraries Government Documents Department
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Process for strengthening silicon based ceramics

Description: A process for strengthening silicon based ceramic monolithic materials and composite materials that contain silicon based ceramic reinforcing phases that requires that the ceramic be exposed to a wet hydrogen atmosphere at about 1400{degrees}C. The process results in a dense, tightly adherent silicon containing oxide layer that heals, blunts, or otherwise negates the detrimental effect of strength limiting flaws on the surface of the ceramic body.
Date: March 7, 1991
Creator: Kim, Hyoun-Ee & Moorhead, A. J.
Partner: UNT Libraries Government Documents Department
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Moist caustic leaching of coal

Description: A process is claimed for reducing the sulfur and ash content of coal. Particulate coal is introduced into a closed heated reaction chamber having an inert atmosphere to which is added moist caustic having a water content in the range of from about 15% by weight to about 35% by weight. The coal and moist caustic are kept at a temperature of about 300{degrees}C. Then, water is added to the coal and caustic mixture to form an aqueous slurry, which is washed with water to remove caustic from the co… more
Date: December 31, 1991
Creator: Nowak, M. A.
Partner: UNT Libraries Government Documents Department
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Precision surface machining

Description: Precision finishing apparatus utilizing line contact polishing to produce optical quality parts. A rotatable cylinder is horizontally disposed above a workpiece which is mounted on a rotatable, and horizontally and vertically adjustable chuck. Predetermined surfaces can be cut into the surface of the cylinder to produce figures of revolution, such as aspheres,, when the workpiece is being rotated.
Date: March 6, 1991
Creator: Lazazzera, Vito J. & Schmell, Rodney A.
Partner: UNT Libraries Government Documents Department
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Integrated null-flux suspension and multiphase propulsion system for magnetically-levitated vehicles

Description: This report discusses a propulsion and stabilization system comprising a series of figure 8 coils mounted vertically on the walls of the guideway to provide suspension, lateral guidance and propulsion of a magnetically levitated vehicle. This system further allows for altering the magnetic field effects by changing the relative position of the loops comprising the figure 8 coils either longitudinally and/or vertically with resulting changes in the propulsion, the vertical stability, and the sus… more
Date: January 1, 1992
Creator: Rote, D. M.; He, Jianliang & Johnson, L. R.
Partner: UNT Libraries Government Documents Department
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Oil/gas separator for installation at burning wells

Description: An oil/gas separator is disclosed that can be utilized to return the burning wells in Kuwait to production. Advantageously, a crane is used to install the separator at a safe distance from the well. The gas from the well is burned off at the site, and the oil is immediately pumped into Kuwait`s oil gathering system. Diverters inside the separator prevent the oil jet coming out of the well from reaching the top vents where the gas is burned. The oil falls back down, and is pumped from an annular… more
Date: December 31, 1991
Creator: Alonso, C. T.; Bender, D. A. & Bowman, B. R.
Partner: UNT Libraries Government Documents Department
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Method to synthesize dense crystallized sodalite pellet for immobilizing halide salt radioactive waste

Description: This report describes a method for immobilizing waste chloride salts containing radionuclides such as cesium and strontium and hazardous materials such as barium. A sodalite intermediate is prepared by mixing appropriate amounts of silica, alumina and sodium hydroxide with respect to sodalite and heating the mixture to form the sodalite intermediate and water. Heating is continued to drive off the water to form a water-free intermediate. The water-free intermediate is mixed with either waste sa… more
Date: January 1, 1992
Creator: Koyama, T.
Partner: UNT Libraries Government Documents Department
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Locking mechanism for indexing device

Description: Disclosed is a locking mechanism for an indexing spindle. A conventional spur gear having outwardly extending teeth is affixed to the spindle. Also included is a rotatably mounted camshaft whose axis is arranged in skewed relationship with the axis of the spindle. A disk-like wedge having opposing camming surfaces is eccentrically mounted on the camshaft. As the camshaft is rotated, the camming surfaces of the disk are interposed between adjacent gear teeth with a wiping action that wedges the … more
Date: January 25, 1982
Creator: Lindenmeyer, C. W.
Partner: UNT Libraries Government Documents Department
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Duplex sampling apparatus and method

Description: An improved apparatus is provided for sampling a gaseous mixture and for measuring mixture components. The apparatus includes two sampling containers connected in series serving as a independently determine the amounts of condensable and noncondensable gases in admixture from a single sample. More specifically, a first container includes a first port capable of selectively connecting to and disconnecting from a sample source and a second port capable of selectively connecting to and disconnecti… more
Date: January 30, 1991
Creator: Brown, P. E. & Lloyd, R.
Partner: UNT Libraries Government Documents Department
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Method of preparing high-temperature-stable thin-film resistors

Description: A chemical vapor deposition method for manufacturing tungsten-silicide thin-film resistors of predetermined bulk resistivity and temperature coefficient of resistance (TCR) is disclosed. Gaseous compounds of tungsten and silicon are decomposed on a hot substrate to deposit a thin-film of tungsten-silicide. The TCR of the film is determined by the crystallinity of the grain structure, which is controlled by the temperature of deposition and the tungsten to silicon ratio. The bulk resistivity is … more
Date: November 12, 1980
Creator: Raymond, L. S.
Partner: UNT Libraries Government Documents Department
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Improved high speed maglev design

Description: This report discusses a propulsion and stabilization system for an inductive repulsion type magnetically levitated vehicle which is propelled and suspended by a system which includes dividing the superconducting magnets into two types: a strong field magnet which is located vertically below the vehicle for propulsion and guidance and a weak field superconducting magnet located at the ends of the vehicle for levitation and added guidance. Several proposed embodiments exist for the placement of t… more
Date: January 1, 1992
Creator: Rote, D. M.; He, Jianliang & Coffey, H. T.
Partner: UNT Libraries Government Documents Department
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Vanadium-pumped titanium x-ray laser

Description: A resonantly photo-pumped x-ray laser is formed of a vanadium and titanium foil combination that is driven by two beams of intense line focused optical laser radiation. Ground state neon-like titanium ions are resonantly photo-pumped by line emission from fluorine-like vanadium ions.
Date: February 13, 1991
Creator: Nilsen, J.
Partner: UNT Libraries Government Documents Department
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Regenerable activated bauxite adsorbent alkali monitor probe

Description: This invention relates to a regenerable activated bauxite adsorber alkali monitor probe for field applications to provide reliable measurement of alkali-vapor 5 concentration in combustion gas with special emphasis on pressurized fluidized-bed combustion (PFBC) off-gas. More particularly, the invention relates to the development of a easily regenerable bauxite adsorbent for use in a method to accurately determine the alkali-vapor content of PFBC 10 exhaust gases.
Date: January 22, 1991
Creator: Lee, S. H. D.
Partner: UNT Libraries Government Documents Department
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Actinide halide complexes

Description: A compound of the formula MX{sub n}L{sub m} wherein M = Th, Pu, Np,or Am thorium, X = a halide atom, n = 3 or 4, L is a coordinating ligand selected from the group consisting of aprotic Lewis bases having an oxygen-, nitrogen-, sulfur-, or phosphorus-donor, and m is 3 or 4 for monodentate ligands or is 2 for bidentate ligands, where n + m = 7 or 8 for monodentate ligands or 5 or 6 for bidentate ligands, a compound of the formula MX{sub n} wherein M, X, and n are as previously defined, and a pro… more
Date: February 7, 1991
Creator: Avens, Larry R.; Zwick, Bill D.; Sattelberger, Alfred P.; Clark, David L. & Watkin, J. G.
Partner: UNT Libraries Government Documents Department
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Pulse combustor with controllable oscillations

Description: A pulse combustor having thermally induced pulse combustion in a continuously flowing system is described. The pulse combustor is fitted with at lease one elongated ceramic body which significantly increases the heat transfer area in the combustion chamber of the combustor. The ceramic body or bodies possess sufficient mass and heat capacity to ignite the fuel-air charge once the ceramic body or bodies are heated by conventional spark plug initiated combustion so as to provide repetitive igniti… more
Date: December 31, 1991
Creator: Richards, G. A.; Morris, G. J. & Welter, M. J.
Partner: UNT Libraries Government Documents Department
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Chemotactic selection of pollutant degrading soil bacteria

Description: A method is described for identifying soil microbial strains which may be bacterial degraders of pollutants. This method includes: Placing a concentration of a pollutant in a substantially closed container; placing the container in a sample of soil for a period of time ranging from one minute to several hours; retrieving the container and collecting its contents; microscopically determining the identity of the bacteria present. Different concentrations of the pollutant can be used to determine … more
Date: March 4, 1991
Creator: Hazen, T. C.
Partner: UNT Libraries Government Documents Department
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