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open access

Counterrotating brushless dc permanent magnet motor

Description: An brushless DC permanent magnet motor is provided for driving an autonomous underwater vehicle. In one embodiment, the motor comprises four substantially flat stators disposed in stacked relationship, with pairs of the stators being axially spaced and each of the stators comprising a tape-wound stator coil; and a first and second substantially flat rotors disposed between the spaced pairs of stators. Each of the rotors includes an annular array of permanent magnets embedded therein. A first sh… more
Date: January 1, 1990
Creator: Hawsey, R. A. & Bailey, J. M.
open access

Extrusion of metal oxide superconducting wire, tube or ribbon

Description: A process and apparatus for extruding a superconducting metal oxide composition YBa{sub 2}Cu{sub 3}O{sub 7-x} provides a wire (tube or ribbon) having a cohesive mass and a degree of flexibility together with enhanced electrical properties. Wire diameters in the range of 6--85 mils have been produced with smaller wires on the order of 10 mils in diameter exhibiting enhanced flexibility for forming braided, or multistrand, configurations for greater current carrying capacity. The composition for … more
Date: January 1, 1990
Creator: Dusek, J.T.
open access

Improved thermal storage module for solar dynamic receivers

Description: 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: January 1, 1990
Creator: Beatty, R. L. & Lauf, R. J.
open access

A method and apparatus for continuous electrophoresis

Description: A method and apparatus for conducting continuous separation of substances by electrophoresis are disclosed. The process involves electrophoretic separation combined with couette flow in a thin volume defined by opposing surfaces. By alternating the polarity of the applied potential and producing reciprocating short rotations of at least on of the surfaces relative to the other, small increments of separation accumulate to cause substantial, useful segregation of electrophoretically separable co… more
Date: January 1, 1990
Creator: Watson, J. S.
open access

Passive decay heat removal system for water-cooled nuclear reactors

Description: This document describes passive decay-heat removal system for a water-cooled nuclear reactor which employs a closed heat transfer loop having heat-exchanging coils inside an open-topped, insulated evaporator located inside the reactor vessel, below its normal water level, in communication with a condenser located outside of containment and exposed to the atmosphere. The heat transfer loop is located such that the evaporator is in a position where, when the water level drops in the reactor, it w… more
Date: January 1, 1990
Creator: Forseberg, C.W.
open access

Process of converting starch to glucose and glucose to lactic acid

Description: This document describes a method for converting starch into lactic acid of sufficient purity for use as a substrate for biodegradable plastics. The process is designed to work on industrial food waste streams such as potato wastes or cheese whey permeate. For potato waste, {alpha}-amylase and calcium chloride are added to the starch containing waste and incubated at a pH of 4--7, a temperature of 90--130{degree}C, and a pressure above 15 psi for not less than 15 minutes. At this point, glucoamy… more
Date: January 1, 1990
Creator: Tsai, TenLin; Sanville, Cynthia Y.; Coleman, Robert D. & Schertz, William W.
open access

Solid-state NMR imaging system

Description: 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: January 1, 1990
Creator: Gopalsami, N.; Dieckman, S.L. & Ellingson, W.A.
open access

A Stripline Fast Faraday Cup for measuring GHz structure of ion beams

Description: The Stripline Fast Faraday Cup is a device which is used to quantitatively and qualitatively measure gigahertz time structure characteristics of ion beams with energies up to at least 30 Mev per nucleon. A stripline geometry is employed in conjunction with an electrostatic screen and a Faraday cup to provide for analysis of the structural characteristics of an ion beam. The stripline geometry allows for a large reduction in the size of the instrument while the electrostatic screen permits measu… more
Date: January 1, 1990
Creator: Bogaty, J. M.
open access

Triaxial thermopile array geo-heat-flow sensor

Description: A triaxial thermopile array geothermal heat flow sensor is designed to measure heat flow in three dimensions in a reconstituted or unperturbed subsurface regime. Heat flow can be measured in conductive or permeable convective media. The sensor may be encased in protective pvc tubing and includes a plurality of thermistors and an array of heat flow transducers produce voltage proportional to heat flux along the subsurface regime and permit direct measurement of heat flow in the subsurface regime… more
Date: January 1, 1990
Creator: Carrigan, Charles R.; Hardee, Harold C.; Reynolds, Gerald D. & Steinfort, Terry D.
open access

Wedge assembly for electrical transformer component spacing

Description: This invention is comprised of a wedge assembly that is easily inserted between two surface to be supported thereby, and thereafter expanded to produce a selected spacing between those surfaces. This wedge assembly has two outer members that are substantially identical except that they are mirror images of each other. Oppositely directed faces of these of these outer members are substantially parallel for the purpose of contacting the surfaces to be separated. The other faces of these outer mem… more
Date: January 1, 1990
Creator: Baggett, F.E. & Cage, W.F.
open access

Processing method for superconducting ceramics

Description: A process for preparing a superconducting ceramic and particularly YBa{sub 2}Cu{sub 3}O{sub 7-{delta}}, where {delta} is in the order of about 0.1--0.4, is carried out using a polymeric binder which decomposes below its ignition point to reduce carbon residue between the grains of the sintered ceramic and a nonhydroxylic organic solvent to limit the problems with water or certain alcohols on the ceramic composition.
Date: May 7, 1990
Creator: Bloom, I. D.; Poeppel, R. B. & Flandermeyer, B. K.
open access

A unique system of Fe/Pd for magneto-optical recording and magnetic switching devices

Description: This invention is comprised of a high density magneto-optical information storage medium utilizing the properties of an ultrathin iron film on a palladium substrate. The present invention comprises a magneto-optical medium capable of thermal and magnetic stability and capable of possessing a vertical orientation of the magnetization vector for the magnetic material. Data storage relies on the temperature dependence of the coercivity of the ultrathin film. Data retrieval derives from the Kerr ef… more
Date: May 22, 1990
Creator: Liu, Chian Q. & Bader, S. D.
open access

A unique system of Fe/Pd for magneto-optical recording and magnetic switching devices

Description: This invention is comprised of a high density magneto-optical information storage medium utilizing the properties of an ultrathin iron film on a palladium substrate. The present invention comprises a magneto-optical medium capable of thermal and magnetic stability and capable of possessing a vertical orientation of the magnetization vector for the magnetic material. Data storage relies on the temperature dependence of the coercivity of the ultrathin film. Data retrieval derives from the Kerr ef… more
Date: May 22, 1990
Creator: Liu, Chian Q. & Bader, S. D.
open access

Method of solubilizing phthalocyanines and metallophthalocyanines

Description: A one-step method of manufacturing soluble phthalocyanines and metallophthalocyanines, like zinc phthalocyanine, by converting a phthalocyanine or a metallophthalocyanine to a trialkylsilyl-substituted derivative is disclosed. The phthalocyanine or metallophthalocyanine is converted to a soluble trialkylsilyl-substituted derivative by interacting the phthalocyanine or metallophthalocyanine with an active metal amide, like lithium 2,2,6, 6-tetra-methylpiperidide, and a halotrialkylsilane, like c… more
Date: June 1, 1990
Creator: Rathke, J. W.; Chen, M. J. & Fendrick, C. M.
open access

Method of solubilizing phthalocyanines and metallophthalocyanines

Description: A one-step method of manufacturing soluble phthalocyanines and metallophthalocyanines, like zinc phthalocyanine, by converting a phthalocyanine or a metallophthalocyanine to a trialkylsilyl-substituted derivative is disclosed. The phthalocyanine or metallophthalocyanine is converted to a soluble trialkylsilyl-substituted derivative by interacting the phthalocyanine or metallophthalocyanine with an active metal amide, like lithium 2,2,6, 6-tetra-methylpiperidide, and a halotrialkylsilane, like c… more
Date: June 1, 1990
Creator: Rathke, Jerome W.; Chen, Michael J. & Fendrick, Carol M.
open access

Water and UV degradable lactic acid polymers

Description: A water and UV light degradable copolymer of monomers of lactic acid and a modifying monomer selected from the class consisting of ethylene and polyethylane glycols (PVB 6/22/90), propylene and and polypropylene (PVB 6/22/90) glycols, P-dioxanone, 1, 5 dioxepan-2-one, 1,4 -oxathialan-2-one, 1,4-dioxide and mixtures thereof. These copolymers are useful for waste disposal and agricultural purposes. Also disclosed is a water degradable blend of polylactic acid or modified polylactic acid and high … more
Date: June 26, 1990
Creator: Bonsignore, P. V. & Coleman, R. D.
open access

Process of making cryogenically cooled high thermal performance crystal optics

Description: A method for constructing a cooled optic wherein one or more cavities are milled, drilled or formed using casting or ultrasound laser machining techniques in a single crystal base and filled with porous material having high thermal conductivity at cryogenic temperatures. A non-machined strain-free single crystal can be bonded to the base to produce superior optics. During operation of the cooled optic, N{sub 2} is pumped through the porous material at a sub-cooled cryogenic inlet temperature an… more
Date: June 29, 1990
Creator: Kuzay, T. M.
open access

Process of making cryogenically cooled high thermal performance crystal optics

Description: A method for constructing a cooled optic wherein one or more cavities are milled, drilled or formed using casting or ultrasound laser machining techniques in a single crystal base and filled with porous material having high thermal conductivity at cryogenic temperatures. A non-machined strain-free single crystal can be bonded to the base to produce superior optics. During operation of the cooled optic, N{sub 2} is pumped through the porous material at a sub-cooled cryogenic inlet temperature an… more
Date: June 29, 1990
Creator: Kuzay, Tuncer M.
open access

Highly conductive electrolyte composites and method of fabrication thereof

Description: An electrolyte composite is manufactured by pressurizing a mixture of ionically conductive glass and an ionically conductive compound at between 12,000 and 24,000 pounds per square inch to produce a pellet. The resulting pellet is then sintered at relatively lower temperatures (800{degrees}C--1200{degrees}C), for example 1000{degrees}C, than are typically required (1400{degrees}C) when fabricating single constituent ceramic electrolytes. The resultant composite is 100 percent conductive at 250{… more
Date: July 17, 1990
Creator: Hash, M. C. & Bloom, I. D.
open access

Process for fabrication of metal oxide films

Description: This invention is comprised of a method of fabricating metal oxide films from a plurality of reactants by inducing a reaction by plasma deposition among the reactants. The plasma reaction is effective for consolidating the reactants and producing thin films of metal oxides, e.g. electro-optically active transition metal oxides, at a high deposition rate. The presence of hydrogen during the plasma reaction enhances the deposition rate of the metal oxide. Various types of metal oxide films can be… more
Date: July 17, 1990
Creator: Tracy, C. E.; Benson, D. & Svensson, S.
open access

Background-reducing x-ray multilayer mirror

Description: This invention is comprised of a background-reducing x-ray multilayer mirror. A multiple-layer ``wavetrap`` deposited over the surface of a layered synthetic microstructure soft x-ray mirror optimized for reflectivity at chosen wavelengths is disclosed for reducing the reflectivity of undesired, longer wavelength incident radiation incident thereon. In three separate mirror designs employing an alternating molybdenum and silicon layered mirrored structure overlaid by two layers of a molybdenum/… more
Date: August 3, 1990
Creator: Bloch, J. J.; Roussel-Dupre, D. & Smith, B. W.
open access

Ductile nickel-silicon alloy

Description: An improvement over prior compositions wherein the ductility of Ni-Si alloys are improved with minor alloying additions of hafnium or zirconium.
Date: August 6, 1990
Creator: Oliver, W. C.
open access

Ductile nickel-silicon alloy

Description: An improvement over prior compositions wherein the ductility of Ni-Si alloys are improved with minor alloying additions of hafnium or zirconium.
Date: August 6, 1990
Creator: Oliver, W. C.
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