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Lapped substrate for enhanced backsurface reflectivity in a thermophotovoltaic energy conversion system

Description: A method is described for fabricating a thermophotovoltaic energy conversion cell including a thin semiconductor wafer substrate having a thickness ({beta}) calculated to decrease the free carrier absorption on a heavily doped substrate; wherein the top surface of the semiconductor wafer substrate is provided with a thermophotovoltaic device, a metallized grid and optionally an antireflective (AR) overcoating; and, the bottom surface (10 ft) of the semiconductor wafer substrate is provided with… more
Date: December 31, 1996
Creator: Baldasaro, Paul F.; Brown, Edward J.; Charache, Greg W. & DePoy, David M.
Partner: UNT Libraries Government Documents Department
open access

Binder Enhanced Refuse Derived Fuel

Description: Patent relating to refuse derived fuels and more particularly to binder enhanced refuse derived fuel pellets and utilization of such pellets in solid-fuel fired furnaces.
Date: October 8, 1996
Creator: Daugherty, Kenneth E.; Venables, Barney J. & Ohlsson, Oscar O.
Partner: UNT College of Arts and Sciences
open access

Method for encapsulating and isolating hazardous cations, medium for encapsulating and isolating hazardous cations

Description: The problems associated with the disposal of toxic metals in an environmentally acceptable manner continues to plague industry. Such metals as nickel, vanadium, molybdenum, cobalt, iron, and antimony present physiological and ecological challenges that are best addressed through minimization of exposure and dispersion. A method for encapsulating hazardous cations is provided comprising supplying a pretreated substrate containing the cations; contacting the substrate with an organo-silane compou… more
Date: December 31, 1996
Creator: Wasserman, S. R.; Anderson, K. B.; Song, K.; Yuchs, S. E. & Marshall, C. L.
Partner: UNT Libraries Government Documents Department
open access

Combustor oscillation pressure stabilizer

Description: In accordance with the objective of the present invention, the active control of unsteady combustion induced oscillations in a combustion chamber fired by a suitable fuel and oxidizer mixture, such as a hydrocarbon fuel and air mixture, is provided by restructuring and moving the position of the main flame front and thereby increasing the transport time and displacing the pressure wave further away from the in-phase relationship with the periodic heat release. The restructuring and repositionin… more
Date: December 31, 1996
Creator: Gemmen, R. S.; Richards, G. A.; Yip, M. T. J.; Robey, E.; Cully, S. R. & Addis, R. E.
Partner: UNT Libraries Government Documents Department
open access

Graphitic packing removal tool

Description: Graphitic packing removal tools are described for removal of the seal rings in one piece from valves and pumps. The packing removal tool has a cylindrical base ring the same size as the packing ring with a surface finish, perforations, knurling or threads for adhesion to the seal ring. Elongated leg shanks are mounted axially along the circumferential center. A slit or slits permit insertion around shafts. A removal tool follower stabilizes the upper portion of the legs to allow a spanner wrenc… more
Date: December 31, 1996
Creator: Meyers, K.E. & Kolsun, G.J.
Partner: UNT Libraries Government Documents Department
open access

Gas-driven microturbine

Description: This paper describes an invention which relates to microtechnology and the fabrication process for developing microelectrical systems. It describes a means for fabricating a gas-driven microturbine capable of providing autonomous propulsion in which the rapidly moving gases are directed through a micromachined turbine to power devices by direct linkage or turbo-electric generators components in a domain ranging from tenths of micrometers to thousands of micrometers.
Date: June 27, 1996
Creator: Sniegowski, J. J.; Rodgers, M. S.; McWhorter, P. J.; Aeschliman, D. P. & Miller, W. M.
Partner: UNT Libraries Government Documents Department
open access

Method and apparatus for probing relative volume fractions

Description: A relative volume fraction probe particularly for use in a multiphase fluid system includes two parallel conductive paths defining there between a sample zone within the system. A generating unit generates time varying electrical signals which are inserted into one of the two parallel conductive paths. A time domain reflectometer receives the time varying electrical signals returned by the second of the two parallel conductive paths and, responsive thereto, outputs a curve of impedance versus d… more
Date: December 31, 1996
Creator: Jandrasits, W.G. & Kikta, T.J.
Partner: UNT Libraries Government Documents Department
open access

Compact cyclone filter train for radiological and hazardous environments

Description: A compact cyclone filter train is described for the removal of hazardous and radiological particles from a gaseous fluid medium which permits a small cyclone separator to be used in a very small space envelope due to the arrangement of the filter housing adjacent to the separator with the cyclone separators and the filters mounted on a plate. The entire unit will have a hoist connection at the center of gravity so that the entire unit including the separator, the filters, and the base can be li… more
Date: December 31, 1996
Creator: Bench, T. R.
Partner: UNT Libraries Government Documents Department
open access

Improved method for the production of atomic ion species from plasma ion sources

Description: A technique to enhance the yield of neutral atomic and ionic species (H{sup +}, D{sup +}, O{sup +}, N{sup +}, etc.) from plasmas. The technique involves the addition of catalyzing agents to the ion discharge. Effective catalysts include H{sub 2}O, O{sub 2}, and SF{sub 6}, among others, with the most effective being water (H{sub 2}O). This technique has been developed at Argonne National Laboratory, where microwave produced beams consisting essentially of 100% atomic neutral species (H) have bee… more
Date: December 31, 1996
Creator: Spence, D. & Lykke, K.
Partner: UNT Libraries Government Documents Department
open access

Mobile machine hazardous working zone warning system

Description: A warning system is provided for a mobile working machine to alert an individual of a potentially dangerous condition in the event the individual strays into a hazardous working zone of the machine. The warning system includes a transmitter mounted on the machine and operable to generate a uniform magnetic field projecting beyond an outer periphery of the machine in defining a hazardous working zone around the machine during operation thereof. A receiver, carried by the individual and activated… more
Date: December 31, 1996
Creator: Schiffbauer, W.H. & Ganoe, C.W.
Partner: UNT Libraries Government Documents Department
open access

Remote repair appliance

Description: A remote appliance is described for supporting a tool for performing work at a worksite on a substantially circular bore of a workpiece and for providing video signals of the worksite to a remote monitor comprising: a baseplate having an inner face and an outer face; a plurality of rollers, wherein each roller is rotatably and adjustably attached to the inner face of the baseplate and positioned to roll against the bore of the workpiece when the baseplate is positioned against the mouth of the … more
Date: December 31, 1996
Creator: Heumann, F.K.; Wilkinson, J.C. & Wooding, D.R.
Partner: UNT Libraries Government Documents Department
open access

Holding fixture for metallographic mount polishing

Description: A fixture for holding mounted specimens for polishing, having an arm; a body attached to one end of the arm, the body having at least one flange having an opening to accommodate a mounted specimen; and a means applying pressure against the outer surface of the mounted specimen to hold the specimen in contact with the polishing surface.
Date: December 31, 1996
Creator: Barth, C.H. & Cramer, C.E.
Partner: UNT Libraries Government Documents Department
open access

Bulk single crystal ternary substrates for a thermophotovoltaic energy conversion system

Description: A thermophotovoltaic energy conversion device and a method for making the device are disclosed. The device includes a substrate formed from a bulk single crystal material having a bandgap (E{sub g}) of 0.4 eV < E{sub g} < 0.7 eV and an emitter fabricated on the substrate formed from one of a p-type and an n-type material. Another thermophotovoltaic energy conversion device includes a host substrate formed from a bulk single crystal material and lattice-matched ternary or quaternary III-V semico… more
Date: December 31, 1996
Creator: Charache, Greg W.; Baldasaro, Paul F. & Nichols, Greg J.
Partner: UNT Libraries Government Documents Department
open access

A thermophotovoltaic energy conversion device

Description: A thermophotovoltaic device and a method for making the thermophotovoltaic device are disclosed. The device includes an n-type semiconductor material substrate having top and bottom surfaces, a tunnel junction formed on the top surface of the substrate, a region of active layers formed on top of the tunnel junction and a back surface reflector (BSR). The tunnel junction includes a layer of heavily doped n-type semiconductor material that is formed on the top surface of the substrate and a layer… more
Date: December 31, 1996
Creator: Charache, G. W.; Baldasaro, P. F. & Egley, J. L.
Partner: UNT Libraries Government Documents Department
open access

Method and apparatus for steady-state magnetic measurement of poloidal magnetic field near a tokamak plasma

Description: A method and apparatus for the steady-state measurement of poloidal magnetic field near a tokamak plasma, where the tokamak is configured with respect to a cylindrical coordinate system having z, phi (toroidal), and r axes. The method is based on combining the two magnetic field principles of induction and torque. The apparatus includes a rotor assembly having a pair of inductive magnetic field pickup coils which are concentrically mounted, orthogonally oriented in the r and z directions, and c… more
Date: December 31, 1996
Creator: Woolley, R.D.
Partner: UNT Libraries Government Documents Department
open access

Method and apparatus for automatically detecting patterns in digital point-ordered signals

Description: The present invention is a method and system for detecting a physical feature of a test piece by detecting a pattern in a signal representing data from inspection of the test piece. The pattern is detected by automated additive decomposition of a digital point-ordered signal which represents the data. The present invention can properly handle a non-periodic signal. A physical parameter of the test piece is measured. A digital point-ordered signal representative of the measured physical paramete… more
Date: December 31, 1996
Creator: Brudnoy, D. M.
Partner: UNT Libraries Government Documents Department
open access

Electronuclear ion fusion in an ion cyclotron resonance reactor

Description: A method and apparatus for generating nuclear fusion by ion cyclotron resonance in an ion trap reactor. The reactor includes a cylindrical housing having an axial axis, an internal surface, and first and second ends. First and second end plates that are charged are respectively located at the first and second ends of the cylindrical housing. A gas layer is adsorbed on the internal surface of the cylindrical housing. Ions are desorbed from the gas layer, forming a plasma layer adjacent to the cy… more
Date: December 1, 1996
Creator: Cowgill, Donald F.
Partner: UNT Libraries Government Documents Department
open access

Superconducting thermoelectric generator

Description: An apparatus and method for producing electricity from heat. The present invention is a thermoelectric generator that uses materials with substantially no electrical resistance, often called superconductors, to efficiently convert heat into electrical energy without resistive losses. Preferably, an array of superconducting elements is encased within a second material with a high thermal conductivity. The second material is preferably a semiconductor. Alternatively, the superconducting material … more
Date: January 1, 1996
Creator: Metzger, John D. & El-Genk, Mohammed S.
Partner: UNT Libraries Government Documents Department
open access

Method for the photocatalytic conversion of methane

Description: The invention relates to a method for converting methane and water to methanol and hydrogen using visible light and a catalyst.
Date: December 1996
Creator: Noceti, R. P.; Taylor, C. E. & D'Este, J. R.
Partner: UNT Libraries Government Documents Department
open access

Down-flow moving-bed gasifier with catalyst recycle

Description: The gasification of coal and other carbonaceous materials by an endothermic gasification reaction is achieved in the presence of a catalyst in a down-flow, moving-bed gasifier. Catalyst is removed along with ash from the gasifier and is then sufficiently heated in a riser/burner by the combustion of residual carbon in the ash to volatilize the catalyst. This volatilized catalyst is returned to the gasifier where it uniformly contacts and condenses on the carbonaceous material. Also, the hot gas… more
Date: December 31, 1996
Creator: Halow, John S.
Partner: UNT Libraries Government Documents Department
open access

Retaining latch for a water pit gate

Description: The present invention relates to retaining devices which are used to latch two elements or parts together and, more particularly, to gate latches for use in locking a gate to a wall bracket in a water pit utilized to store or handle hazardous materials. A retaining latch is provided comprising a latch plate which is rotatably mounted to each end of the top of the gate and a recessed opening, formed in the gate frame, for engaging an edge of the latch plate. The latch plate is circular in profil… more
Date: December 31, 1996
Creator: Beale, A.R.
Partner: UNT Libraries Government Documents Department
open access

Multilayered nuclear fuel element

Description: A nuclear fuel element is described which is suitable for high temperature applications comprised of a kernel of fissile material overlaid with concentric layers of impervious graphite, vitreous carbon, pyrolytic carbon and metal carbide. The kernel of fissile material is surrounded by a layer of impervious graphite. The layer of impervious graphite is then surrounded by a layer of vitreous carbon. Finally, an outer shell which includes alternating layers of pyrolytic carbon and metal carbide s… more
Date: December 1, 1996
Creator: Schweitzer, Donald G. & Sastre, Cesar
Partner: UNT Libraries Government Documents Department
open access

Segregated tandem filter for enhanced conversion efficiency in a thermophotovoltaic energy conversion system

Description: A filter system to transmit short wavelength radiation and reflect long wavelength radiation for a thermophotovoltaic energy conversion cell comprises an optically transparent substrate segregation layer with at least one coherent wavelength in optical thickness; a dielectric interference filter deposited on one side of the substrate segregation layer, the interference filter being disposed toward the source of radiation, the interference filter including a plurality of alternating layers of hi… more
Date: December 31, 1996
Creator: Brown, Edward J.; Baldasaro, Paul F. & Dziendziel, Randolph J.
Partner: UNT Libraries Government Documents Department
open access

Particle injector for fluid systems

Description: A particle injector device provides injection of particles into a liquid stream. The device includes a funnel portion comprising a conical member having side walls tapering from a top opening (which receives the particles) down to a relatively smaller exit opening. A funnel inlet receives a portion of the liquid stream and the latter is directed onto the side walls of the conical member so as to create a cushion of liquid against which the particles impact. A main section of the device includes… more
Date: December 31, 1996
Creator: Ruch, J.F.
Partner: UNT Libraries Government Documents Department
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