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1,984 Matching Results
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Fiber optic monitoring device
This invention is comprised of a device for the purpose of monitoring light transmissions in optical fibers comprises a fiber optic tap that optically diverts a fraction of a transmitted optical signal without disrupting the integrity of the signal. The diverted signal is carried, preferably by the fiber optic tap, to a lens or lens system that disperses the light over a solid angle that facilitates viewing. The dispersed light indicates whether or not the monitored optical fiber or system of optical fibers is currently transmitting optical information.
Date:
December 31, 1992
Creator:
Samborsky, J. K.
System:
The UNT Digital Library
Solid-state NMR imaging system
An accessory for use with a solid-state NMR spectrometer includes a special imaging probe with linear, high-field strength gradient fields and high-power broadband RF coils using a back projection method for data acquisition and image reconstruction, and a real-time pulse programmer adaptable for use by a conventional computer for complex high speed pulse sequences.
Date:
December 31, 1990
Creator:
Gopalsami, N.; Dieckman, S. L. & Ellingson, W. A.
System:
The UNT Digital Library
Selective epitaxy using the GILD process
The present invention comprises a method of selective epitaxy on a semiconductor substrate. The present invention provides a method of selectively forming high quality, thin GeSi layers in a silicon circuit, and a method for fabricating smaller semiconductor chips with a greater yield (more error free chips) at a lower cost. The method comprises forming an upper layer over a substrate, and depositing a reflectivity mask which is then removed over selected sections. Using a laser to melt the unmasked sections of the upper layer, the semiconductor material in the upper layer is heated and diffused into the substrate semiconductor material. By varying the amount of laser radiation, the epitaxial layer is formed to a controlled depth which may be very thin. When cooled, a single crystal epitaxial layer is formed over the patterned substrate. The present invention provides the ability to selectively grow layers of mixed semiconductors over patterned substrates such as a layer of Ge{sub x}Si{sub 1-x} grown over silicon. Such a process may be used to manufacture small transistors that have a narrow base, heavy doping, and high gain. The narrowness allows a faster transistor, and the heavy doping reduces the resistance of the narrow layer. The …
Date:
December 31, 1990
Creator:
Weiner, K. H.
System:
The UNT Digital Library
Catalyzed enzyme electrodes
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 the enzyme for long term availability in the electrode structure. The carbon supported catalyst provides catalytic sites throughout the layer for the oxidation of hydrogen peroxide from the enzyme reactions. The carbon support then provides a conductive path for establishing an electrical signal to the electrical conductor. In one embodiment, the electrical conductor is a carbon cloth that permits oxygen or other gas to be introduced to the perfluorosulfonic polymer to promote the enzyme reaction independent of oxygen in the solution being tested.
Date:
December 31, 1992
Creator:
Zawodzinski, T. A.; Wilson, M. S.; Rishpon, J. & Gottesfeld, S.
System:
The UNT Digital Library
Grate assembly for fixed-bed coal gasifier
A grate assembly for a coal gasifier of a moving-bed or fixed-bed type is provided for crushing agglomerates of solid material such as clinkers, tailoring the radial distribution of reactant gases entering the gasification reaction zone, and control of the radial distribution of downwardly moving solid velocities in the gasification and combustion zone. The clinker crushing is provided by pinching clinkers between vertically oriented stationary bars and angled bars supported on the upper surface of a rotating conical grate. The distribution of the reactant gases is provided by the selective positioning of horizontally oriented passageways extending through the grate. The radial distribution of the solids is provided by mounting a vertically and generally radially extending scoop mechanism on the upper surface of the grate near the apex thereof.
Date:
December 31, 1992
Creator:
Notestein, J. E.
System:
The UNT Digital Library
Sample Holder for X-Ray Diffractometry
A sample holder for use with x-ray diffractometers with the capability to rotate the sample, as well as to adjust the position of the sample in the x, y, and z directions. Adjustment in the x direction is accomplished through loosening set screws, moving a platform, and retightening the set screws. Motion translators are used for adjustment in the y and z directions. An electric motor rotates the sample, and receives power from the diffractometer.
Date:
December 31, 1991
Creator:
Hesch, Victor L.
System:
The UNT Digital Library
High density hexagonal boron nitride prepared by hot isostatic pressing in refractory metal containers
Boron nitride powder with less than or equal to the oxygen content of starting powder (down to 0.5% or less) is hot isostatically pressed in a refractory metal container to produce hexagonal boron nitride with a bulk density greater than 2.0 g/cc. The refractory metal container is formed of tantalum, niobium, tungsten, molybdenum or alloys thereof in the form of a cansister or alternatively plasma sprayed or chemical vapor deposited onto a powder compact. Hot isostatic pressing at 1800{degrees}C and 30 KSI (206.8 MPa) argon pressure for four hours produces a bulk density of 2.21 g/cc. Complex shapes can be made.
Date:
December 31, 1990
Creator:
Hoenig, C. L.
System:
The UNT Digital Library
Ice electrode electrolytic cell
This invention relates to a method and apparatus for removing heavy metals from waste water, soils, or process streams by electrolytic cell means. The method includes cooling a cell cathode to form an ice layer over the cathode and then applying an electric current to deposit a layer of the heavy metal over the ice. The metal is then easily removed after melting the ice. In a second embodiment, the same ice-covered electrode can be employed to form powdered metals.
Date:
December 31, 1992
Creator:
Glenn, D. F.; Suciu, D. F.; Harris, T. L. & Ingram, J. C.
System:
The UNT Digital Library
An ion source based on the cathodic arc
This invention is comprised of a cylindrically symmetric arc source to produce a ring of ions which leave the surface of the arc target radially and are reflected by electrostatic fields present in the source to a point of use, such as a part to be coated. An array of electrically isolated rings positioned in the source serves the duel purpose of minimizing bouncing of macroparticles and providing electrical insulation to maximize the electric field gradients within the source. The source also includes a series of baffles which function as a filtering or trapping mechanism for any macroparticles.
Date:
December 31, 1992
Creator:
Sanders, D. M. & Falabella, S.
System:
The UNT Digital Library
Active imaging system with Faraday filter
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.
System:
The UNT Digital Library
Improved thermal storage module for solar dynamic receivers
This invention relates to a thermal storage apparatus and more particularly to an apparatus for use in conjunction with solar dynamic energy storage systems. The invention is comprised of a thermal energy storage system comprising a germanium phase change material and a graphite container.
Date:
December 31, 1990
Creator:
Beatty, R. L. & Lauf, R. J.
System:
The UNT Digital Library
Compact acoustic refrigerator
This invention is comprised of a compact acoustic refrigeration system that actively cools components, e.g., electrical circuits, in a borehole environment. An acoustic engine includes first thermodynamic elements for generating a standing acoustic wave in a selected medium. An acoustic refrigerator includes second thermodynamic elements located in the standing wave for generating a relatively cold temperature at a first end of the second thermodynamic elements and a relatively hot temperature at a second end of the second thermodynamic elements. A resonator volume cooperates with the first and second thermodynamic elements to support the standing wave. To accommodate the high heat fluxes required for heat transfer to/from the first and second thermodynamic elements, first heat pipes transfer heat from the heat load to the second thermodynamic elements and second heat pipes transfer heat from first and second thermodynamic elements to the borehole environment.
Date:
December 31, 1991
Creator:
Bennett, G. A.
System:
The UNT Digital Library
Palladium/kieselguhr composition and method
Disclosed is a hydrogen-absorbing composition and method for making such a composition. The composition comprises a metal hydride, preferably palladium, deposited onto a porous substrate such as kieselguhr, for use in hydrogen-absorbing processes. The composition is made by immersing a substrate in a concentrated solution containing palladium, such as tetra-amine palladium nitrate. Palladium from the solution is deposited onto the porous substrate, which is preferably in the form of kieselguhr particles. The substrate is then removed from the solution, calcined, and heat treated. This process is repeated until the desired amount of palladium has been deposited onto the substrate.
Date:
December 31, 1992
Creator:
Mosley, W. C. Jr.
System:
The UNT Digital Library
Roller Boring-Drill.
Patent for a boring-drill that can be manufactured cheaply. It provides sufficient space for the casing to follow it in order to prevent the walls from caving in. The patent includes instructions and illustrations.
Date:
December 1, 1914
Creator:
Hughes, Howard Robard
System:
The Portal to Texas History
Automatic Air-Brake Applier.
Patent for automatic air brake applier to release the air in the train pipe with a resultant application of the brakes upon a car wheel leaving the tracks, including illustration.
Date:
December 16, 1913
Creator:
Hall, Charles E.
System:
The Portal to Texas History
Bank Pass-Book.
Patent for an improved Bank Pass-Book that shows the identification of the individual written on the inside and outside of the book.
Date:
December 8, 1914
Creator:
Exline, Marcus P.
System:
The Portal to Texas History
Adjustable Window-Shade
Patent for an adjustable window-shade that is more useful and can be "raised and lowered in its entirety" (lines 10-11) including instructions and illustration.
Date:
December 5, 1916
Creator:
Hayes, George Daniel
System:
The Portal to Texas History
Envelop.
Patent for an envelope "whereby the cutting device acts as a partial ejector for the letter" (lines 12-13), including illustrations and instructions.
Date:
December 1, 1914
Creator:
Donaldson, James Macon
System:
The Portal to Texas History
Improvement in Harrows.
Patent for a new and improved harrow for more flexible use and easier cleaning.
Date:
December 15, 1914
Creator:
Buckley, James William
System:
The Portal to Texas History
Process of and Apparatus for Sizing Comminuted Material.
Patent for "certain new and useful improvements in process of and apparatus for sizing or classifying comminuted material according to the size of the particles of the material" (lines 13-16), including illustrations and instructions.
Date:
December 1, 1914
Creator:
Sutton, Henry M.; Steele, Walter L. & Steele, Edwin G.
System:
The Portal to Texas History
Apparatus For Forming And Vulcanizing Rubberized Fabric And Rubber Tires.
Patent for an apparatus for "forming and vulcanizing rubberized fabric and rubber tires for use on vehicle and other wheels &c., &c.” (lines 13-16) including instructions and illustrations.
Date:
December 8, 1914
Creator:
Dees, Mark A.
System:
The Portal to Texas History
Improvement in Fence Posts.
Patent for improvements in fence posts and has "for its primary object to provide a post which may be of extremely simple construction and operation and especially adapted for use in constructing wire fences" (lines 12-15) including instructions and illustrations.
Date:
December 29, 1914
Creator:
Conner, Elmer E.
System:
The Portal to Texas History
Adjustable Cultivator-Plow Standard.
Patent for an adjustable cultivator plow that is designed to be strong and durable as well as efficient and simple.
Date:
December 15, 1914
Creator:
Wright, James B.
System:
The Portal to Texas History
Aeroplane.
Patent for an aeroplane which is a device that is able to travel through the air due its shape and the reaction from atmosphere and gravity.
Date:
December 16, 1913
Creator:
Hanna, John G.
System:
The Portal to Texas History