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Explosive laser light initiation of propellants

Description: This invention is comprised of an improved initiator for artillery shell using an explosively generated laser light to uniformly initiate the propellent. A small quantity of a high explosive, when detonated, creates a high pressure and temperature, causing the surrounding noble gas to fluoresce. This fluorescence is directed into a lasing material, which lases, and directs laser light into a cavity in the propellant, uniformly initiating the propellant.
Date: December 31, 1992
Creator: Piltch, M. S.
Partner: UNT Libraries Government Documents Department
open access

Selectable fragmentation warhead

Description: This report discusses a selectable fragmentation warhead which is capable of producing a predetermined number of fragments from a metal plate, and accelerating the fragments toward a target. A first explosive located adjacent to the plate is detonated at selected number of points by laser-driven slapper detonators. In one embodiment, a smoother-disk and a second explosive, located adjacent to the first explosive, serve to increase acceleration of the fragments toward a target. The ability to pr… more
Date: December 31, 1992
Creator: Bryan, C. S.; Paisley, D. L.; Montoya, N. I. & Stahl, D. B.
Partner: UNT Libraries Government Documents Department
open access

Cobalt carbonyl catalyzed olefin hydroformylation in supercritical carbon dioxide

Description: A method of olefin hydroformylation is provided wherein an olefin reacts with a carbonyl catalyst and with reaction gases such as hydrogen and carbon monoxide in the presence of a supercritical reaction solvent, such as carbon dioxide. The invention provides higher yields of n-isomer product without the gas-liquid mixing rate limitation seen in conventional Oxo processes using liquid media.
Date: December 31, 1992
Creator: Rathke, Jerome W. & Klingler, Robert J.
Partner: UNT Libraries Government Documents Department
open access

Ballistic impulse gauge

Description: This invention is comprised of a gauge for detecting the impulse generated in sample materials by X-rays or other impulse producing mechanisms which utilizes a pair of flat annular springs to support a plunger relative to a housing which may itself be supported by a pair of flat annular springs in a second housing. The plunger has a mounting plate mounted on one end and at the other, a position or velocity transducer is mounted. The annular springs consist of an outer ring and an inner ring wit… more
Date: December 31, 1992
Creator: Ault, S. K.
Partner: UNT Libraries Government Documents Department
open access

Method and apparatus for removing ions from soil

Description: This invention is comprised of a method and apparatus for selectively removing species of ions from an area of soil. Permeable membranes and impregnated with an ion exchange resin that is specific to one or more species of chemical ions are inserted into ground in close proximity to, and on opposing sides of, a soil area of interest. An electric potential is applied across electrodes and to cause the migration of ions out of soil area toward the membranes. Preferably, the resin exchanges ions o… more
Date: December 31, 1992
Creator: Bibler, J. P.
Partner: UNT Libraries Government Documents Department
open access

Oil/gas collector/separator for underwater oil leaks

Description: This invention is comprised of an oil/gas collector/separator for recovery of oil leaking, for example, from an offshore or underwater oil well. The separator is floated over the point of the leak and tethered in place so as to receive oil/gas floating, or forced under pressure, toward the water surface from either a broken or leaking oil well casing, line, or sunken ship. The separator is provided with a downwardly extending skirt to contain the oil/gas which floats or is forced upward into a … more
Date: December 31, 1992
Creator: Henning, C. D.
Partner: UNT Libraries Government Documents Department
open access

Method for dissolution and stabilization of silica-rich fibers

Description: This invention is comprised of a method for dissolving silica-rich fibers such as borosilicate fibers, fiberglass and asbestos to stabilize them for disposal. The method comprises (1) immersing the fibers in hot, five-weight-percent sodium hydroxide solution until the concentration of dissolved silica reaches equilibrium and a only a residue is left (about 48 hours), then immersing the residue in hot, five-weight-percent nitric acid until the residue dissolves (about 96 hours). After adjusting … more
Date: December 31, 1992
Creator: Jantzen, Carol M.
Partner: UNT Libraries Government Documents Department
open access

Eliminating livelock in flushable routing networks

Description: This invention is comprised of a method for livelock-free message routing is provided in a network of interconnected nodes that is flushable in time T. An input message processor generates sequences of at least N time intervals, each of duration T. An input register provides for receiving and holding each input message, where the message is assigned a priority state p during an nth one of the N time intervals. At each of the network nodes a message processor reads the assigned priority state an… more
Date: December 31, 1992
Creator: Faber, V.
Partner: UNT Libraries Government Documents Department
open access

Apparatus and method for removing particulate deposits from high temperature filters

Description: The combustion of a fuel-air mixture is used to provide a high-temperature and high-pressure pulse of gaseous combustion products for the back-flush cleaning of ceramic filter elements contained in a barrier filter system and utilized to separate particulates from particulate-laden process gases at high temperature and high pressure. The volume of gaseous combustion products provided by the combustion of the fuel-air mixture is preferably divided into a plurality of streams each passing through… more
Date: December 31, 1992
Creator: Nakaishi, C. V.; Holcombe, N. T. & Micheli, P. L.
Partner: UNT Libraries Government Documents Department
open access

Portable high precision pressure transducer system

Description: A high precision pressure transducer system for checking the reliability of a second pressure transducer system used to monitor the level of a fluid confined in a holding tank. Since the response of the pressure transducer is temperature sensitive, it is continually housed in an battery powered oven which is configured to provide a temperature stable environment at specified temperature for an extended period of time. Further, a high precision temperature stabilized oscillator and counter are c… more
Date: December 31, 1992
Creator: Piper, T. C.; Morgan, J. P.; Marchant, N. J. & Bolton, S. M.
Partner: UNT Libraries Government Documents Department
open access

Chemical vapor infiltration using microwave energy

Description: This invention is comprised of a method for producing reinforced ceramic composite articles by means of chemical vapor infiltration and deposition in which an inverted temperature gradient is utilized. Microwave energy is the source of heat for the process.
Date: December 31, 1992
Creator: Devlin, D. J.; Currier, R. P.; Laia, J. R. & Barbero, R. S.
Partner: UNT Libraries Government Documents Department
open access

Microwave impregnation of porous materials with thermal energy storage materials

Description: A method for impregnating a porous, non-metallic construction material with a solid phase-change material is described. The phase-change material in finely divided form is spread onto the surface of the porous material, after which the porous material is exposed to microwave energy for a time sufficient to melt the phase-change material. The melted material is spontaneously absorbed into the pores of the porous material. A sealing chemical may also be included with the phase-change material (or… more
Date: December 31, 1992
Creator: Benson, D. K. & Burrows, R. W.
Partner: UNT Libraries Government Documents Department
open access

Digitally controlled distributed phase shifter

Description: A digitally controlled distributed phase shifter is comprised of N phase shifters. Digital control is achieved by using N binary length-weighted electrodes located on the top surface of a waveguide. A control terminal is attached to each electrode thereby allowing the application of a control signal. The control signal is either one of two discrete bias voltages. The application of the discrete bias voltages change the modal index of a portion of the waveguide that corresponds to a length of th… more
Date: December 31, 1992
Creator: Hietala, V. M.; Kravitz, S. H. & Vawter, G. A.
Partner: UNT Libraries Government Documents Department
open access

Drill string enclosure

Description: This invention is comprised of a drill string enclosure which consists of six component parts, including; a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts. The upper acrylic cylinder is optional based upon the drill string length. The drill string enclosure allows for an efficient drill and sight operation at a hazardous waste site.
Date: December 31, 1992
Creator: Jorgensen, D. K.; Kuhns, D. J.; Wiersholm, O. & Miller, T. A.
Partner: UNT Libraries Government Documents Department
open access

Vortex nozzle for segmenting and transporting metal chips from turning operations

Description: This invention is comprised of an apparatus for collecting, segmenting and conveying metal chips from machining operations which utilizes a compressed gas driven vortex nozzle for receiving the chip and twisting it to cause the chip to segment through the application of torsional forces to the chip. The vortex nozzle is open ended and generally tubular in shape with a converging inlet end, a constant diameter throat section and a diverging exhaust end. Compressed gas is discharged through angle… more
Date: December 31, 1992
Creator: Bieg, L. F.
Partner: UNT Libraries Government Documents Department
open access

Recovery of germanium-68 from irradiated targets

Description: This invention is comprised of a process for selective separation of germanium-68 from proton irradiated molybdenum targets is provided and includes dissolving the molybdenum target in a hydrogen peroxide solution to form a first ion-containing solution, contacting the first ion-containing solution with a cationic resin whereby ions selected from the group consisting of molybdenum, niobium, technetium, selenium,vanadium, arsenic, germanium, zirconium and rubidium remain in a second ion-containi… more
Date: December 31, 1992
Creator: Phillips, D. R.; Jamriska, D. J. Sr. & Hamilton, V. T.
Partner: UNT Libraries Government Documents Department
open access

Normalization method for video images

Description: The present invention relates to a method and apparatus for automatically and adaptively normalizing analog signals representative of video images in object detection systems. Such normalization maximizes the average information content of the video images and, thereby, provides optimal digitized images for object detection and identification. The present invention manipulates two system control signals -- gain control signal and offset control signal -- to convert an analog image signal into a… more
Date: December 31, 1992
Creator: Donohoe, G. W. & Hush, D. R.
Partner: UNT Libraries Government Documents Department
open access

Method for exponentiating in cryptographic systems

Description: An improved cryptographic method utilizing exponentiation is provided which has the advantage of reducing the number of multiplications required to determine the legitimacy of a message or user. The basic method comprises the steps of selecting a key from a pre-approved group of integer keys g; exponentiating the key by an integer value e, where e represents a digital signature, to generate a value g{sup e}; transmitting the value g{sup e} to a remote facility by a communications network; recei… more
Date: December 31, 1992
Creator: Brickell, E. F.; Gordon, D. M. & McCurley, K. S.
Partner: UNT Libraries Government Documents Department
open access

Filtered cathodic arc source

Description: Disclosed is a continuous, cathodic arc ion source coupled to a macro-particle filter capable of separation or elimination of macro-particles from the ion flux produced by cathodic arc discharge. The ion source employs an axial magnetic field on a cathode (target) having tapered sides to confine the arc, thereby providing high target material utilization. A bent magnetic field is used to guide the metal ions from the target to the part to be coated. The macro-particle filter consists of two str… more
Date: December 31, 1992
Creator: Falabella, S. & Sanders, D. M.
Partner: UNT Libraries Government Documents Department
open access

Method and apparatus for determining two-phase flow in rock fracture

Description: One object of the present invention to provide an improved method and apparatus for measuring the relative permeability of a rock fracture to multiple phases in a manner which will provide even more uniform delivery of both wetting and non-wetting phases to the fracture edge. It is another object of the invention to provide an improved method and apparatus for measuring the permeability of multiple phases through a rock fracture which comprises delivering the respective phases through manifold … more
Date: December 31, 1992
Creator: Persoff, P.; Pruess, K. & Myer, L.
Partner: UNT Libraries Government Documents Department
open access

Traveling-wave photodetector

Description: The traveling-wave photodetector of the present invention combines an absorptive optical waveguide and an electrical transmission line, in which optical absorption in the waveguide results in a photocurrent at the electrodes of the electrical transmission line. The optical waveguide and electrical transmission line of the electrically distributed traveling-wave photodetector are designed to achieve matched velocities between the light in the optical waveguide and electrical signal generated on … more
Date: December 31, 1992
Creator: Hietala, V. M. & Vawter, G. A.
Partner: UNT Libraries Government Documents Department
open access

Phase-sensitive flow cytometer

Description: This report describes phase-sensitive flow cytometer (FCM) which provides additional FCM capability to use the fluorescence lifetime of one or more fluorochromes bound to single cells to provide additional information regarding the cells. The resulting fluorescence emission can be resolved into individual fluorescence signals if two fluorochromes are present or can be converted directly to a decay lifetime from a single fluorochrome. The excitation light for the fluorochromes is modulated to pr… more
Date: December 31, 1992
Creator: Steinkamp, J. A.
Partner: UNT Libraries Government Documents Department
open access

Enhanced radiation resistant fiber optics

Description: A process for producing an optical fiber having enhanced radiation resitance is provided, the process including maintaining an optical fiber within a hydrogen-containing atmosphere for sufficient time to yield a hydrogen-permeated optical fiber having an elevated internal hydrogen concentration, and irradiating the hydrogen-permeated optical fiber at a time while the optical fiber has an elevated internal hydrogen concentration with a source of ionizing radiation. The radiation source is typica… more
Date: December 31, 1992
Creator: Lyons, P. B. & Looney, L. D.
Partner: UNT Libraries Government Documents Department
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