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4
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1
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18,569
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76
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The Civil War and its Aftermath: Diverse Perspectives
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Method for determining the hardness of strain hardening articles of tungsten-nickel-iron alloy
The present invention is directed to a rapid nondestructive method for determining the extent of strain hardening in an article of tungsten-nickel-iron alloy. The method comprises saturating the article with a magnetic field from a permanent magnet, measuring the magnetic flux emanating from the article, comparing the measurements of the magnetic flux emanating from the article with measured magnetic fluxes from similarly shaped standards of the alloy with known amounts of strain hardening to determine the hardness.
Date:
July 29, 1981
Creator:
Wallace, S.A.
System:
The UNT Digital Library
Improved solvent extraction recovery of shale oil. [DOE patent application]
An improved process for solvent extraction of organic matter from shale by two extraction steps in sequence. The extraction steps are: (1) treating a kerogen-containing shale with a solvent system comprising a combination of water and an alcohol at a temperature of about 375 to 425/sup 0/C; and (2) treating the product of (1) with a solvent system comprising a combination of an alcohol and another organic solvent at an elevated temperature, but not above about 425/sup 0/C. The organic matter is recovered by separating the liquid which results from step (2) from the shale solids.
Date:
July 20, 1981
Creator:
McKay, John F. & Chong, Shuang-Ling
System:
The UNT Digital Library
Control of temperature and heat flux in a combustor using coal-derived gas of varying heat content. [Patent application]
The present invention is directed to a fuel-air control system for a combustor in which coal-derived gas of varying heat content is used. To maintain the temperature in the combustor at an essentially constant value the fuel-to-air ratio is adjusted by using a temperature actuated variable pressure regulator in the gas feed line to compensate for the variability of the heat content of the gas. The velocity of the products of combustion is maintained at an essentially constant flow rate by controlling the mass flow of the air and fuel through linked valves on the gas and air feed lines.
Date:
June 3, 1981
Creator:
Loth, John L.; Nakaishi, Curtis V.; Carpenter, Larry K. & Bird, Jimmie D.
System:
The UNT Digital Library
High-temperature electrically conductive ceramic composite and method for making same
The present invention relates to a metal-oxide ceramic composition useful in induction heating applications for treating uranium and uranium alloys. The ceramic composition is electrically conductive at room temperature and is nonreactive with molten uranium. The composition is prepared from a particulate admixture of 20 to 50 vol. % niobium and zirconium oxide which may be stabilized with an addition of a further oxide such as magnesium oxide, calcium oxide, or yttria. The composition is prepared by blending the powders, pressing or casting the blend into the desired product configuration, and then sintering the casting or compact in an inert atmosphere. In the casting operation, calcium aluminate is preferably added to the admixture in place of a like quantity of zirconia for providing a cement to help maintain the integrity of the sintered product.
Date:
June 9, 1981
Creator:
Beck, D.E.; Gooch, J.G.; Holcombe, C.E. Jr. & Masters, D.R.
System:
The UNT Digital Library
Electrochemical cell and negative electrode therefor. [Li-Al anode]
A secondary electrochemical cell is described with the positive and negative electrodes separated by a molten salt electrolyte with the negative electrode comprising a particulate mixture of lithium-aluminum alloy and electrolyte and an additive selected from graphitized carbon, Raney iron or mixtures thereof. The lithium-aluminum alloy is present in the range of from about 45 to about 80% by volume of the negative electrode, and the electrolyte is present in an amount not less than about 10% by volume of the negative electrode. The additive of graphitized carbon is present in the range of from about 1 to about 10% by volume of the negative electrode, and the Raney iron additive is present in the range of from about 3 to about 10% by volume of the negative electrode.
Date:
July 29, 1981
Creator:
Kaun, T.D.
System:
The UNT Digital Library
Power recovery system for coal-liquefaction process. [Patent application]
Method and apparatus for minimizing energy required to inject reactant such as coal-oil slurry into a reaction vessel, using high pressure effluent from the latter to displace the reactant from a containment vessel into the reaction vessel with assistance of low pressure pump. Effluent is degassed in the containment vessel, and a heel of the degassed effluent is maintained between incoming effluent and reactant in the containment vessel.
Date:
April 24, 1981
Creator:
Horton, J. R.
System:
The UNT Digital Library
Radioactive-materials shipping-cask anticontamination enclosure
An anticontamination device for use in storing shipping casks for radioactive materials comprises (1) a seal plate assembly; (2) a double-layer plastic bag; and (3) a water management system or means for water management.
Date:
August 18, 1981
Creator:
Belmonte, M.S.; Davis, J.H. & Williams, D.A.
System:
The UNT Digital Library
Coal gasification vessel. [Patent application]
A vessel system comprises an outer shell of carbon fibers held in a binder, a coolant circulation mechanism and control mechanism and an inner shell comprised of a refractory material and is of light weight and capable of withstanding the extreme temperature and pressure environment of, for example, a coal gasification process. The control mechanism can be computer controlled and can be used to monitor and modulate the coolant which is provided through the circulation mechanism for cooling and protecting the carbon fiber and outer shell. The control mechanism is also used to locate any isolated hot spots which may occur through the local disintegration of the inner refractory shell.
Date:
March 17, 1981
Creator:
Loo, Billy W.
System:
The UNT Digital Library
Ternary liquid scintillator for optical-fiber applications
A multicomponent liquid scintillator solution for use as a radiation-to-light converter in conjunction with a fiber optic transmission system. The scintillator includes a quantity of 5-amino-9-diethylaminobenz (a) phenoxazonium nitrate (Nile Blue Nitrate) as a solute in a fluor solvent such as benzyl alcohol. The use of PPD as an additional solute is also disclosed. The system is controllable by addition of a suitable quenching agent, such as phenol.
Date:
June 1, 1981
Creator:
Franks, L. A. & Lutz, S. S.
System:
The UNT Digital Library
Coal gasification apparatus. [Patent application]
Coal hydrogenation vessel has hydrogen heating passages extending vertically through its wall and opening into its interior.
Date:
April 24, 1981
Creator:
Nagy, C.K.
System:
The UNT Digital Library
Method and apparatus for producing cryogenic targets
An improved method and apparatus are given for producing cryogenic inertially driven fusion targets in the fast isothermal freezing (FIF) method. Improved coupling efficiency and greater availability of volume near the target for diagnostic purposes and for fusion driver beam propagation result. Other embodiments include a new electrical switch and a new explosive detonator, all embodiments making use of a purposeful heating by means of optical fibers.
Date:
August 28, 1981
Creator:
Murphy, James T. & Miller, John R.
System:
The UNT Digital Library
Gamma-thermometer-based reactor-core liquid-level detector. [PWR]
A system is provided which employs a modified gamma thermometer for determining the liquid coolant level within a nuclear reactor core. The gamma thermometer which normally is employed to monitor local core heat generation rate (reactor power), is modified by thermocouple junctions and leads to obtain an unambiguous indication of the presence or absence of coolant liquid at the gamma thermometer location. A signal processor generates a signal based on the thermometer surface heat transfer coefficient by comparing the signals from the thermocouples at the thermometer location. The generated signal is a direct indication of loss of coolant due to the change in surface heat transfer when coolant liquid drops below the thermometer location. The loss of coolant indication is independent of reactor power at the thermometer location. Further, the same thermometer may still be used for the normal power monitoring function.
Date:
June 16, 1981
Creator:
Burns, T.J.
System:
The UNT Digital Library
Coolant monitoring apparatus for nuclear reactors. [PWR; BWR]
A system for monitoring coolant conditions within a pressurized vessel is described. A length of tubing extends outward from the vessel from an open end containing a first line restriction at the location to be monitored. The flowing fluid is cooled and condensed before passing through a second line restriction. Measurement of pressure drop at the second line restriction gives an indication of fluid condition at the first line restriction. Multiple lengths of tubing with open ends at incremental elevations can measure coolant level within the vessel.
Date:
August 6, 1981
Creator:
Tokarz, R.D.
System:
The UNT Digital Library
Electrochemical cell having cyclindircal electrode elements
A secondary, high temperature electrochemical cell especially adapted for lithium alloy negative electrodes, transition metal chalcogenide positive electrodes and alkali metal halide or alkaline earth metal halide electrolyte is disclosed. The cell is held within an elongated cylindrical container in which one of the active materials is filled around the outside surfaces of a pluraity of perforate tubular current collectors along the length of the container. Each of the current collector tubes contain a concentric atubular layer of electrically insulative ceramic as an interelectrode separator. The active material of opposite polarity in elongated pin shape is positioned longitudinally within the separator layer. A second electrically conductive tube with perforate walls can be swagged or otherwise bonded to the outer surface of the pin as a current cllector and the electrically insulative ceramic layer can be coated or otherwise layered onto the outer surface of this second current collector. Alternatively, the central pin electrode can include an axial core as a current collector.
Date:
March 5, 1981
Creator:
Nelson, P.A. & Shimotake, H.
System:
The UNT Digital Library
Transistorized power switch and base drive circuit therefore
A high power switching circuit is disclosed which utilizes a four-terminal Darlington transistor block to improve switching speed, particularly in rapid turn-off. Two independent reverse drive currents are utilized during turn-off in order to expel the minority carriers of the Darlington pair at their own charge sweep-out rate. The reverse drive current may be provided by a current transformer, the secondary of which is tapped to the base terminal of the power stage of the Darlington block. In one application, the switching circuit is used in each power switching element in a chopper-inverter drive of an electric vehicle propulsion system.
Date:
March 24, 1981
Creator:
Lee, F.C. & Carter, R.A.
System:
The UNT Digital Library
Nuclear reactor fuel-assembly duct-tube-to-handling-socket attachment system. [LMFBR]
A reusable system is described for removably attaching the upper end of a nuclear reactor duct tube to the lower end of a nuclear reactor fuel assembly handling socket. A transition ring, fixed to the duct tube's upper end, has an interior-threaded section with a first locking hole segment. An adaptor ring, fixed to the handling socket's lower end has an outside-threaded section with a second locking hole segment. The inside and outside threaded sections match and can be joined so that the first and second locking hole segments can be aligned to form a locking hole. A locking ring, with a locking pin, slides over the adaptor ring so that the locking pin fits in the locking hole. A swage lock or a cantilever finger lock is formed from the locking cup collar to fit in a matching groove in the locking ring to prevent the locking ring's locking pin from backing out of the locking hole.
Date:
March 5, 1981
Creator:
unknown
System:
The UNT Digital Library
System for utilizing shale oil fines. [Patent application]
A system is provided for utilizing fines of carbonaceous materials such as particles or pieces of oil shale of about one-half inch or less diameter which are rejected for use in some conventional or prior surface retorting process, which obtains maximum utilization of the energy content of the fines and which produces a waste which is relatively inert and of a size to facilitate disposal. The system includes a cyclone retort which pyrolyzes the fines in the presence of heated gaseous combustion products, the cyclone retort having a first outlet through which vapors can exit that can be cooled to provide oil, and having a second outlet through which spent shale fines are removed. A burner connected to the spent shale outlet of the cyclone retort, burns the spent shale with air, to provide hot combustion products that are carried back to the cyclone retort to supply gaseous combustion products utilized therein. The burner heats the spent shale to a temperature which forms a molten slag, and the molten slag is removed from the burner into a quencher that suddenly cools the molten slag to form granules that are relatively inert and of a size that is convenient to handle …
Date:
March 13, 1981
Creator:
Harak, A. E.
System:
The UNT Digital Library
Improved method of preparing composite superconducting wire
An improved method of preparing composite multifilament superconducting wire of Nb/sub 3/Sn in a copper matrix which eliminates the necessity of coating the drawn wire with tin is described. A generalized cylindrical billet of an alloy of copper containing at least 15 weight percent niobium, present in the copper as discrete, randomly distributed and oriented dendritic-shaped particles, is provided with at least one longitudinal opening which is filled with tin to form a composite drawing rod. The drawing rod is then drawn to form a ductile composite multifilament wire containing a filament of tin. The ductile wire containing the tin can then be wound into magnet coils or other devices before heating to diffuse the tin through the wire to react with the niobium forming Nb/sub 3/Sn. Also described is an improved method for making large billets of the copper-niobium alloy by consumable-arc casting.
Date:
April 24, 1981
Creator:
Verhoeven, J. D.; Gibson, E. D.; Finnemore, D. K.; Ostenson, J. E.; Schmidt, F. A. & Owen, C. V.
System:
The UNT Digital Library
Carrier sense data highway system. [Patent for a two-way Data Transmission System]
A data transmission system is disclosed which includes a transmission medium which has a certain propagation delay time over its length. A number of data stations are successively coupled to the transmission medium for communicating with one another. Each of the data stations includes a transmitter for originating signals, each signal beginning with a carrier of a duration which is at least the propagation delay time of the transmission medium. Each data station also includes a receiver which receives other signals from other data stations and inhibits operation of the transmitter at the same data station when a carrier of another signal is received.
Date:
April 30, 1981
Creator:
Frankel, R.
System:
The UNT Digital Library
Improved Process and Apparatus for Energy Storage and Release
Patent relating to an improved process and apparatus for energy storage and release.
Date:
May 14, 2004
Creator:
Imholt, Timothy; Allara, David L., 1937-; Gnade, Bruce & Roberts, James A.
System:
The UNT Digital Library
Apparatus and Method for Implementation of Elements, Species and Compositions in Nanostructured Materials
Patent relating to an apparatus and method for implantation of elements, species and compositions in nanostructured materials.
Date:
December 16, 2004
Creator:
Imholt, Timothy
System:
The UNT Digital Library
An Aqueous Dispersion of Hydrogel Nanoparticles with Inverse Thermoreversible Gelation
Patent relating to an aqueous dispersion of hydrogel nanoparticles with inverse thermoreversible gelation.
Date:
December 9, 2004
Creator:
Hu, Zhibing & Xia, Xiaohu
System:
The UNT Digital Library
Novel Metal Hydroxide Derivatives Containing Chemically Bound Organophosphorus or Polyphosphate Species as Flame Retardants
Patent relating to novel metal hydroxide derivatives containing chemically bound organophosphorus or polyphosphate species as flame retardants.
Date:
March 29, 2006
Creator:
Braterman, Paul S.; D'Souza, Nandika & Dharia, Amit
System:
The UNT Digital Library
Toxic Agent Sensor and Detector Method, Apparatus, and System
Patent relating to a toxic agent sensor and detector method, apparatus, and system.
Date:
May 25, 2006
Creator:
Henley, Donald E.; Anand, Aman; Imholt, Timothy & Roberts, James A.
System:
The UNT Digital Library