Resource Type
Partner
Degree Department
Country
States
Decade
Month
Day
Results:
1 - 24 of
587
next
Single Reflective Optical Element for Interference Lithography
Patent relating to optical elements for use in interference lithography.
Date:
August 1, 2014
Creator:
Lin, Yuankun; Lutkenhaus, Jeffrey & George, David
System:
The UNT Digital Library
Reaction-Forming Method for Producing Near Net-Shape Refractory Metal Carbides
A method for reaction forming refractory metal carbides. The method involves the fabrication of a glassy carbon preform by casting an organic, resin-based liquid mixture into a mold and subsequently heat treating it in two steps, which cures and pyrolizes the resin resulting in a porous carbon preform. By varying the amounts of the constituents in the organic, resin-based liquid mixture, control over the density of the carbon preform is obtained. Control of the density and microstructure of the carbon preform allows for determination of the microstructure and properties of the refractory metal carbide material produced. The glassy carbon preform is placed on a bed of refractory metal or refractory metal--silicon alloy. The pieces are heated above the melting point of the metal or alloy. The molten metal wicks inside the porous carbon preform and reacts, forming the refractory metal carbide or refractory metal carbide plus a minor secondary phase.
Date:
July 20, 2004
Creator:
Palmisiano, Marc N.; Jakubenas, Kevin J. & Baranwal, Rita
System:
The UNT Digital Library
Smart Radiological Dosimeter
A radiation dosimeter providing an indication of the dose of radiation to which the radiation sensor has been exposed. The dosimeter contains features enabling the monitoring and evaluating of radiological risks so that a user can concentrate on the task at hand. The dosimeter provides an audible alarm indication that a predetermined time period has elapsed, an audible alarm indication reminding the user to check the dosimeter indication periodically, an audible alarm indicating that a predetermined accumulated dose has been prematurely reached, and an audible alarm indication prior or to reaching the 3/4 scale point.
Date:
July 20, 2004
Creator:
Kosslow, William J. & Bandzuch, Gregory S.
System:
The UNT Digital Library
Low Resistance Electrode Construction
An electrochemical cell having a cathode and an anode in contact with an electrolyte. Both electrodes or one of them has an electrically conducting non-metal receptacle defining a chamber with a first metal having a melting point in the range of from about room temperature to about 800 C inside said receptacle chamber. A second metal with a melting point greater than about 800 C is in contact with the first metal inside the receptacle chamber and extends outside of the receptacle chamber to form a terminal for the anode. The electrolyte may include the oxides, halides or mixtures thereof of one or more of Li, V, U, Al and the lanthanides. Metal may be produced at the cathode during operation of the cell and oxygen or chlorine at the anode.
Date:
January 20, 2000
Creator:
Redey, Laszlo & Karell, Eric
System:
The UNT Digital Library
Very Large Aperture Diffractive Space Telescope
A very large (10's of meters) aperture space telescope including two separate spacecraft--an optical primary functioning as a magnifying glass and an optical secondary functioning as an eyepiece. The spacecraft are spaced up to several kilometers apart with the eyepiece directly behind the magnifying glass ''aiming'' at an intended target with their relative orientation determining the optical axis of the telescope and hence the targets being observed. The magnifying glass includes a very large-aperture, very-thin-membrane, diffractive lens, e.g., a Fresnel lens, which intercepts incoming light over its full aperture and focuses it towards the eyepiece. The eyepiece has a much smaller, meter-scale aperture and is designed to move along the focal surface of the magnifying glass, gathering up the incoming light and converting it to high quality images. The positions of the two space craft are controlled both to maintain a good optical focus and to point at desired targets.
Date:
April 20, 1998
Creator:
Hyde, Roderick Allen
System:
The UNT Digital Library
Pipe crawler with stabilizing midsection
This invention is comprised of a pipe crawler having a midsection that provides the stability and flexibility to allow the pipe crawler to negotiate curved and uneven segments of piping while traveling through piping systems. The pipe crawler comprises a front leg assembly, a rear leg assembly, a midsection with a gimbal at each end for connecting the midsection to the front and rear leg assemblies in a flexible manner, and an air cylinder for changing the distance between the front and rear leg assemblies. The pipe crawler moves in ``inch worm`` fashion with the front and rear leg assemblies alternating between an extended and a retracted position as the air cylinder moves the retracted leg assembly forward. The midsection has a plurality of legs extending radially for holding the midsection within a maximum displacement from the piping axis so that the gimbals are not pivoted to extreme angles where they might lock up or seize. When the midsection is displaced sufficiently, its legs with wheels on each end engage the interior surface of the piping and prevent further displacement. Using two gimbals divides the angle between the planes defined by the front and rear leg assemblies which also helps …
Date:
September 20, 1993
Creator:
Zollinger, W.T. & Treanor, R.C.
System:
The UNT Digital Library
Piping inspection instrument carriage
This invention is comprised of a pipe inspection instrument carriage for use with a pipe crawler or other locomotion means for performing internal inspections of piping surfaces. The carriage has a front leg assembly, a rear leg assembly and a central support connecting the two assemblies and for mounting an instrument arm having inspection instruments. The instrument arm has means mounted distally thereon for axially aligning the inspection instrumentation and means for extending the inspection instruments radially outward to operably position the inspection instruments on the piping interior. Also, the carriage has means for rotating the central support and the front leg assembly with respect to the rear leg assembly so that the inspection instruments azimuthally scan the piping interior. The instrument carriage allows performance of all piping inspection operations with a minimum of moving parts, thus decreasing the likelihood of performance failure.
Date:
September 20, 1993
Creator:
Zollinger, W.T. & Treanor, R.C.
System:
The UNT Digital Library
Sterilization of fermentation vessels by ethanol/water mixtures
This invention is comprised of a method for sterilizing process fermentation vessels with a concentrated alcohol and water mixture integrated in a fuel alcohol or other alcohol production facility. Hot, concentrated alcohol is drawn from a distillation or other purification stage and sprayed into the empty fermentation vessels. This sterilizing alcohol/water mixture should be of a sufficient concentration, preferably higher than 12% alcohol by volume, to be toxic to undesirable microorganisms. Following sterilization, this sterilizing alcohol/water mixture can be recovered back into the same distillation or other purification stage from which it was withdrawn. The process of this invention has its best application in, but is not limited to, batch fermentation processes, wherein the fermentation vessels must be emptied, cleaned, and sterilized following completion of each batch fermentation process.
Date:
March 20, 1991
Creator:
Wyman, C. E.
System:
The UNT Digital Library
Compensated intruder-detection systems
The invention is an improvement to an intruder-detection system of the kind where intruder-induced signals are transmitted through a medium whose conductance varies with certain climatic conditions. The improved system includes means coupled to the medium for converting the intruder-induced signals received therefrom to a first electrical signal. Means also are provided for generating a reference signal proportional to the climate-induced changes in the signal-conductance of the medium. Means are provided for generating, from the first electrical signal and the reference signal, an electrical output signal which is unaffected by the changes in signal-conductance. Means are provided to give warning when the output signal exceeds a selected value. In another aspect, the invention is a method for operating an intruder-detection system of the kind wherein an intrusion-generated signal transmitted through a detection medium is converted to a first electrical signal. The first electrical signal contains variations resulting from climate-induced changes in the medium. The method of the invention comprises generating an electrical reference signal proportional to the climate-induced changes in the medium; conditioning the first signal with the reference signal to produce an electrical output signal which is unaffected by the climate-induced changes in the medium; and impressing the resulting …
Date:
January 20, 1982
Creator:
McNeilly, D.R. & Miller, W.R.
System:
The UNT Digital Library
Downhole refractive-index logging device. [Patent application]
This invention provides an antenna arrangement for accurately measuring the magnetic permeability of earth formations. It provides a high-resolution coil array of a transmitting coil and six receiving coils to enable self-consistency checks for evaluating tight gas and oil-bearing strata. (DLC)
Date:
January 20, 1982
Creator:
Yu, Jiunn S.
System:
The UNT Digital Library
Novel 7-substituted coumarin compounds and an improved method for their synthesis. [Patent application]
Novel substituted coumarin compounds and an improved method for their synthesis are disclosed. The preferred class of compounds are substituted at the 7-position. The method of synthesis comprises reacting a polyhydroxy benzene or a substituted phenol, with a ..beta..-alkoxy acrylic acid or nitrile, in the presence of a Lewis acid catalyst. By the inclusion of the catalyst in the reaction mixture, the reaction can be carried out under much milder experimental conditions and in increased yields. The method is also applicable to the preparation of substituted amino phenols.
Date:
January 20, 1982
Creator:
Bissell, Eugene R.
System:
The UNT Digital Library
Shutdown system for a nuclear reactor
An ultimate shutdown system is provided for termination of neutronic activity in a nuclear reactor. The shutdown system includes bead chains comprising spherical containers suspended on a flexible cable. The containers are comprised of mating hemispherical shells which provide a ruggedized enclosure for reactor poison material. The bead chains, normally suspended above the reactor core on storage spools, are released for downward travel upon command from an external reactor monitor. The chains are capable of horizontal movement, so as to flow around obstructions in the reactor during their downward motion.
Date:
January 20, 1982
Creator:
Groh, E.F.; Olson, A.P.; Wade, D.C. & Robinson, B.W.
System:
The UNT Digital Library
Reinjection laser oscillator and method
A uv preionized CO/sub 2/ oscillator with integral four-pass amplifier capable of providing 1 to 5 GW laser pulses with pulse widths from 0.1 to 0.5 ns full width at half-maximum (FWHM) is described. The apparatus is operated at any pressure from 1 atm to 10 atm without the necessity of complex high voltage electronics. The reinjection technique employed gives rise to a compact, efficient system that is particularly immune to alignment instabilities with a minimal amount of hardware and complexity.
Date:
August 20, 1981
Creator:
McLellan, Edward J.
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
Automatic voltage-imbalance detector
A device is described for indicating and preventing damage to voltage cells such as galvanic cells and fuel cells connected in series by detecting sequential voltages and comparing these voltages to adjacent voltage cells. The device is implemented by using operational amplifiers and switching circuitry is provided by transistors. The device can be utilized in battery powered electric vehicles to prevent galvanic cell damage and also in series connected fuel cells to prevent fuel cell damage.
Date:
May 20, 1981
Creator:
Bobbett, R. E.; McCormick, J. B. & Kerwin, W. J.
System:
The UNT Digital Library
Salad Dressing
Patent for improving salad dressing. This salad dressing has high quality ingredients to go with any salad.
Date:
November 20, 1923
Creator:
Scholl, William H. & Scholl, Barney
System:
The Portal to Texas History
Core-Taking Device
Patent for improvements to a core-taking device which will "form a core, in the process of drilling, and embodies means for severing the core, when formed, and retaining the same in the core barrel until, it is withdrawn for inspection" (lines 13-17), including illustrations.
Date:
June 20, 1922
Creator:
Christian, Walton G.
System:
The Portal to Texas History
Mop
Patent for "a simple and durable construction of mop in which the fibre holding element consists of strands of twisted wire" (lines 9-11) designed such that the mop maintains its shape with or without the handle, including illustrations.
Date:
June 20, 1922
Creator:
Welch, James. S.
System:
The Portal to Texas History
Cotton-Harvester
Patent for Patent for a cotton harvester machine which can collect rows of cotton crops using a scoop and exhaust fan, while also able to remove boll weevils, and cotton from bolls which are unopened.
Date:
December 20, 1921
Creator:
Cannon, Burrell
System:
The Portal to Texas History
Fishhook.
Patent for a fishhook that allows for a swiveling motion that does not interfere with the connection to the fishing line.
Date:
December 20, 1921
Creator:
King, James Manning
System:
The Portal to Texas History
Motor-Vehicle for Traversing Marsh-Lands.
Patent for a steerable motor vehicle that can be driven in marshlands.
Date:
December 20, 1921
Creator:
Ray, Malcolm
System:
The Portal to Texas History
Fireproof Building Construction
Patent for improvements to the construction of fireproof buildings, using steel or concreate to create a "skeleton" frame.
Date:
September 20, 1921
Creator:
Ward, Alfred P.
System:
The Portal to Texas History
Meat-Cutting Machine
Patent for a meat-cutting machine that employs a powered knife and saw combination for the slicing of meat.
Date:
September 20, 1921
Creator:
Creed, William T.
System:
The Portal to Texas History
Motormeter-Anchor.
Patent for a new Motormeter-Anchor: a device that will "provide a means whereby a motormeter can be anchored securely to the radiator of an automobile, thus making theft of same impossible, or difficult that it will not be attempted" (lines 8-12).
Date:
September 20, 1921
Creator:
Ashton, William James
System:
The Portal to Texas History