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/sup 18/F-4-fluoroantipyrine (open access)

/sup 18/F-4-fluoroantipyrine

The novel radioactive compound /sup 18/F-4-fluoroantipyrine having high specific activity which can be used in nuclear medicine in diagnostic applications, prepared by the direct fluorination of antipyrine in acetic acid with radioactive fluorine at room temperature and purifying said radioactive compound by means of gel chromatography with ethyl acetate as eluent is disclosed. The non-radioactive 4-fluoroantipyrine can also be prepared by the direct fluorination of antipyrine in acetic acid with molecular fluorine at room temperature and purified by means of gel chromatography with ethyl acetate eluent.
Date: January 1, 1980
Creator: Shiue, Chyng-Ysnn & Wolf, Alfred P.
System: The UNT Digital Library
Passive decay heat removal system for water-cooled nuclear reactors (open access)

Passive decay heat removal system for water-cooled nuclear reactors

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 will become exposed to steam. Vapor produced in the evaporator passes upward to the condenser above the normal water level. In operation, condensation in the condenser removes heat from the system, and the condensed liquid is returned to the evaporator. The system is disposed such that during normal reactor operations where the water level is at its usual position, very little heat will be removed from the system, but during emergency, low water level conditions, substantial amounts of decay heat will be removed.
Date: January 1, 1990
Creator: Forseberg, C.W.
System: The UNT Digital Library
Extrusion of metal oxide superconducting wire, tube or ribbon (open access)

Extrusion of metal oxide superconducting wire, tube or ribbon

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 extrusion contains a polymeric binder to provide a cohesive mass to bind the particles together during the extrusion process with the binder subsequently removed at lower temperatures during sintering. The composition for extrusion further includes a deflocculent, an organic plasticizer and a solvent which also are subsequently removed during sintering. Electrically conductive tubing with an inner diameter of 52 mil and an outer diameter of 87--335 mil has also been produced. Flat ribbons have been produced in the range of 10--125 mil thick by 100--500 mil wide. The superconducting wire, tube or ribbon may include an outer ceramic insulating sheath co-extruded with the wire, tubing or ribbon.
Date: January 1, 1990
Creator: Dusek, J.T.
System: The UNT Digital Library
Improved thermal storage module for solar dynamic receivers (open access)

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: January 1, 1990
Creator: Beatty, R. L. & Lauf, R. J.
System: The UNT Digital Library
Clutch Driven Reaction Wheel Steering Unit (open access)

Clutch Driven Reaction Wheel Steering Unit

Patent relating to a clutch driven reaction wheel steering unit.
Date: April 5, 2005
Creator: Smith, Monty J. & Maestas, Jeffrey E.
System: The UNT Digital Library
Pressure gradient passivation of carbonaceous material normally susceptible to spontaneous combustion (open access)

Pressure gradient passivation of carbonaceous material normally susceptible to spontaneous combustion

This invention is a process for the passivation or deactivation with respect to oxygen of a carbonaceous material by the exposure of the carbonaceous material to an oxygenated gas in which the oxygenated gas pressure is increased from a first pressure to a second pressure and then the pressure is changed to a third pressure. Preferably a cyclic process which comprises exposing the carbonaceous material to the gas at low pressure and increasing the pressure to a second higher pressure and then returning the pressure to a lower pressure is used. The cycle is repeated at least twice wherein the higher pressure may be increased after a selected number of cycles.
Date: January 29, 2002
Creator: Ochs, Thomas L.; Sands, William D.; Schroeder, Karl; Summers, Cathy A. & Utz, Bruce R.
System: The UNT Digital Library
Apparatus and Method for Increasing the Diameter of Metal Alloy Wires Within a Molten Metal Pool (open access)

Apparatus and Method for Increasing the Diameter of Metal Alloy Wires Within a Molten Metal Pool

In a dip forming process the core material to be coated is introduced directly into a source block of coating material eliminating the need for a bushing entrance component. The process containment vessel or crucible is heated so that only a portion of the coating material becomes molten, leaving a solid portion of material as the entrance port of, and seal around, the core material. The crucible can contain molten and solid metals and is especially useful when coating core material with reactive metals. The source block of coating material has been machined to include a close tolerance hole of a size and shape to closely fit the core material. The core material moves first through the solid portion of the source block of coating material where the close tolerance hole has been machined, then through a solid/molten interface, and finally through the molten phase where the diameter of the core material is increased. The crucible may or may not require water-cooling depending upon the type of material used in crucible construction. The system may operate under vacuum, partial vacuum, atmospheric pressure, or positive pressure depending upon the type of source material being used.
Date: January 29, 2002
Creator: Hartman, Alan D.; Argetsinger, Edward R.; Hansen, Jeffrey S.; Paige, Jack I.; King, Paul E. & Turner, Paul C.
System: The UNT Digital Library
Bale-Forming Apparatus (open access)

Bale-Forming Apparatus

Patent for an automatic bale forming apparatus that can be set to make a certain size cotton bale and will stop when it reaches that size and send the finished bale out on a conveyer belt and begin the next one.
Date: January 21, 1908
Creator: Reagan, Edgar
System: The Portal to Texas History
Calf-Weaner. (open access)

Calf-Weaner.

Patent for "new and useful Improvements in Calf-Weaners." (line 5-6) including instructions and illustrations.
Date: January 9, 1906
Creator: Chandler, William E.
System: The Portal to Texas History
Baling-Press (open access)

Baling-Press

Patent for a baling press that uses the minimum amount of power to accomplish the baling process.
Date: January 17, 1911
Creator: Gill, Fleet & Graham, Daniel O.
System: The Portal to Texas History
Cultivator (open access)

Cultivator

Patent for a cultivator. Illustration included.
Date: January 29, 1907
Creator: Carrell, Fitzhu L.
System: The Portal to Texas History
Embroidering Attachment for Sewing-Machines. (open access)

Embroidering Attachment for Sewing-Machines.

Patent for an Embroidering Attachment for Sewing Machines that permits the movement of the material in any direction in order to improve embroidery designing.
Date: January 30, 1906
Creator: Jacobs, John S.
System: The Portal to Texas History
Cotton Chopping Machine (open access)

Cotton Chopping Machine

Patent for a cotton chopping machine. This invention is used to thin cotton plants with revolving blades that cut and destroy plants. Illustrations included.
Date: January 29, 1907
Creator: Tucker, Samuel Houston
System: The Portal to Texas History
Wind and Water Motor. (open access)

Wind and Water Motor.

Patent for improvements in wind and water motors in which it will not only increase its efficiency and durability but also, be capable of operating in tidal rivers, streams and other currents. This is an improvement of patent no. 588572 of the same inventor. Illustration is included.
Date: January 9, 1900
Creator: Hardaway, Robert Early
System: The Portal to Texas History
Cotton-Chopper. (open access)

Cotton-Chopper.

Patent for a new and improved cotton chopper, including instructions and illustrations.
Date: January 23, 1900
Creator: Kirby, Richard W.
System: The Portal to Texas History
Cultivator Hopple (open access)

Cultivator Hopple

Patent for a cultivator hopple. The hopple is a device for shifting beams of cultivators for the purpose of adjusting plows. Illustrations included.
Date: January 1, 1907
Creator: Cowart, Stephen A.
System: The Portal to Texas History
Air-Cycle (open access)

Air-Cycle

Patent for an air cycle that allows a person to fly by pedaling. Illustrations included.
Date: January 9, 1912
Creator: Price, Joseph H.
System: The Portal to Texas History
Cultivator (open access)

Cultivator

Patent for a cultivator. Illustration included.
Date: January 15, 1907
Creator: Nicholson, Matthew Harris & Rosenbaum, Eugene
System: The Portal to Texas History
End-Gate Fastener (open access)

End-Gate Fastener

Patent for a fastener to hold end gate and sideboards of wagon in place and attached to body of wagon. Allows for adjustment.
Date: January 21, 1902
Creator: Nichols, Walter B.; Nichols, Edward A. & Schad, Frank X.
System: The Portal to Texas History
Hanger For Draw Heads (open access)

Hanger For Draw Heads

Patent for a hanger for draw heads. This invention is designed to support draw-heads in use with street-railways cars. Illustration included.
Date: January 29, 1907
Creator: Savage, Harley G.
System: The Portal to Texas History
Automatic Stopping Mechanism for Engines. (open access)

Automatic Stopping Mechanism for Engines.

Patent for certain new and useful improvements in automatic stopping mechanism for engines.
Date: January 11, 1898
Creator: Hunter, Victor Emmet
System: The Portal to Texas History
Cotton Thinning Plow (open access)

Cotton Thinning Plow

Patent for cotton thinning plow. Illustration included.
Date: January 1, 1907
Creator: Edgin, William Alaxander
System: The Portal to Texas History
Attachment for Laundry-Extractors (open access)

Attachment for Laundry-Extractors

Patent for a time cut-off and brake attachment for laundry extractors for preventing accidents. Illustrations included.
Date: January 23, 1912
Creator: Moore, Robert Marion
System: The Portal to Texas History
Churn. (open access)

Churn.

Patent for an automatic butter churn with illustrations.
Date: January 28, 1902
Creator: Fitzhugh, James, S.
System: The Portal to Texas History