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High-efficiency photoionization detector (open access)

High-efficiency photoionization detector

A high efficiency photoionization detector using tetraaminoethylenes in a gaseous state having a low ionization potential and a relative photoionization cross section which closely matches the emission spectrum of xenon gas. Imaging proportional counters are also disclosed using the novel photoionization detector of the invention. The compound of greatest interest is TMAE which comprises tetrakis(dimethylamino)ethylene which has a measured ionization potential of 5.36 +- 0.02 eV, and a vapor pressure of 0.35 torr at 20/sup 0/C.
Date: May 12, 1981
Creator: Anderson, D.F.
System: The UNT Digital Library
pH meter probe assembly (open access)

pH meter probe assembly

An assembly is disclosed for mounting a pH probe in a flowing solution, such as a sanitary sewer line, which prevents the sensitive glass portion of the probe from becoming coated with grease, oil, and other contaminants, whereby the probe gives reliable pH indication over an extended period of time. The pH probe assembly utilizes a special filter media and a timed back-rinse feature for flushing clear surface contaminants of the filter. The flushing liquid is of a known pH and is utilized to check performance of the probe.
Date: June 12, 1981
Creator: Hale, C.J.
System: The UNT Digital Library
Method for cleaning solution used in nuclear-fuel reprocessing. (open access)

Method for cleaning solution used in nuclear-fuel reprocessing.

A nuclear fuel processing solution containing: (1) hydrocarbon diluent; (2) tri-n-butyl phosphate or tri-2-ethylhexyl phosphate; and (3) monobutyl phosphate, dibutyl phosphate, mono-2-ethylhexyl phosphate, di-2-ethylhexyl phosphate, or a complex formed by plutonium, uranium, or a fission product thereof with monobutyl phosphate, dibutyl phosphate, mono-2-ethylhexyl phosphate, or di-2-ethylhexyl phosphate is contacted with silica gel having alkali ions absorbed thereon to remove any degradation products from said solution. The principal impurities removed from TBP solvent by the process of this invention are monobutyl phosphate, dibutyl phosphate, UO/sub 2//sup 2 +/, Pu/sup 4 +/, and fission products of plutonium and uranium complexed with monobutyl phosphate or dibutyl phosphate. Nitric acid is also removed from the TBP solution by the treated silica gel. Conventional adsorption column techniques are applicable for the process of the invention.
Date: May 12, 1981
Creator: Tallent, O. K.; Dodson, K. E. & Mailen, J. C.
System: The UNT Digital Library
Conductor for a fluid-cooled winding and method for making same (open access)

Conductor for a fluid-cooled winding and method for making same

A conductor and method of making the conductor are provided for use in winding electrical coils which are cooled by a fluid communicating with the conductor. The conductor is cold worked through twisting and reshaping steps to form a generally rectangular cross section conductor having a plurality of helical cooling grooves extending axially of the conductor. The conductor configuration makes it suitable for a wide variety of winding applications and permits the use of simple strip insulation between turns and perforated sheet insulation between layers of the winding.
Date: May 12, 1981
Creator: Kenney, W. J.
System: The UNT Digital Library
Process and Apparatus for Microwave Desorption of Elements of Species from Carbon Nanotubes (open access)

Process and Apparatus for Microwave Desorption of Elements of Species from Carbon Nanotubes

Patent relating to the process and apparatus for microwave desorption of elements or species from carbon nanotubes.
Date: January 23, 2004
Creator: Tour, James M.; Roberts, James A. & Imholt, Timothy
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
Folding Poultry-Crate (open access)

Folding Poultry-Crate

Patent for a folding poultry-crate. Illustration included.
Date: April 12, 1910
Creator: Lightfoot, James W.
System: The Portal to Texas History
Baling Press (open access)

Baling Press

Patent for a baling press. Illustrations included
Date: February 12, 1907
Creator: Stopple, John J.
System: The Portal to Texas History
Planter. (open access)

Planter.

Patent for a new and useful improvements in cotton-planters.
Date: April 12, 1898
Creator: Schofield, James Drommond
System: The Portal to Texas History
Combined Cultivator and Cotton-Chopper. (open access)

Combined Cultivator and Cotton-Chopper.

Patent for a combined cultivator and cotton-chopper, to "provide an improved cotton-chopping mechanism which is adapted to be combined with and operated in connection with a sulky-cultivator, whereby a growing crop of cotton may be plowed and chopped or hoed simultaneously" (lines 15-20).
Date: March 13, 1900
Creator: Blaschke, Frank J.
System: The Portal to Texas History
Suspensory (open access)

Suspensory

Patent for suspensory to prevent binding and discomfort. Illustration included.
Date: July 12, 1904
Creator: Munsey, Elbert W.
System: The Portal to Texas History
Soda-Tank for Dipping Lumber (open access)

Soda-Tank for Dipping Lumber

Patent for an apparatus which contains a tank of soda in which yellow pine lumber is dipped to prevent blue stain. Illustrations included.
Date: December 12, 1911
Creator: Trout, Walter Charles & Trout, William Henry
System: The Portal to Texas History
Machine for Cutting Baled Hay (open access)

Machine for Cutting Baled Hay

Patent for a machine for cutting baled hay. Illustrations included.
Date: May 12, 1908
Creator: Richmond, George E.
System: The Portal to Texas History
Checkrein Attachment (open access)

Checkrein Attachment

Patent for checkrein attachment. This invention is intended for use with harnessed horses. Illustration included.
Date: April 12, 1904
Creator: Clary, John A. & Butler, Hard
System: The Portal to Texas History
Padlock (open access)

Padlock

Patent for a padlock. Illustration included.
Date: April 12, 1910
Creator: Greer, Benjamin J.
System: The Portal to Texas History
Double Speed Engine (open access)

Double Speed Engine

Patent for a double speed engine. Illustrations included.
Date: July 12, 1904
Creator: Richards, Oliver L.
System: The Portal to Texas History
Kettle. (open access)

Kettle.

Patent for an improved kettle that can be used for both ordinary kettle purposes and for the purpose of keeping coffee, eggs, or other foods warm.
Date: February 12, 1907
Creator: Redwood, Archibald G.
System: The Portal to Texas History
Grain-Sourer. (open access)

Grain-Sourer.

Patent for certain new and useful improvements in grain scourers, including instructions and illustrations.
Date: December 12, 1899
Creator: McLellan, Frederick A.
System: The Portal to Texas History
Roundabout Swing (open access)

Roundabout Swing

Patent for a roundabout swing. Illustrations included.
Date: November 12, 1912
Creator: Jones, Oliver P.
System: The Portal to Texas History
Automatic Weighing-Scale (open access)

Automatic Weighing-Scale

Patent for improvements in automatic weightlifting scales. The modifications aim to facilitate the weighting of materials in bulk.
Date: December 12, 1911
Creator: Carter, Edward D.
System: The Portal to Texas History
Cotton Gin (open access)

Cotton Gin

Patent for a cotton gin. This is an improvement over previous gins. The invention uses air blasting methods and dispenses with brush drums. Illustration included.
Date: May 12, 1908
Creator: Lumpkin, Robert B.
System: The Portal to Texas History
Process of Electrostatic Separation. (open access)

Process of Electrostatic Separation.

Patent for new improvements to Processes of Electrostatic Separation, "particularly to a process where the comminuted material subjected to the influence of an electrostatic field" (lines 12-14) including instructions and illustrations.
Date: March 12, 1912
Creator: Sutton, Henry M.; Steele, Walter L. & Steele, Edwin G.
System: The Portal to Texas History
Cotton-Thinning Machine (open access)

Cotton-Thinning Machine

Patent for a cotton thinning machine. Illustrations included.
Date: July 12, 1912
Creator: Brawner, William Jefferson
System: The Portal to Texas History
Stovepipe-Thimble. (open access)

Stovepipe-Thimble.

Patent for certain new and useful improvements in stovepipe thimbles, including instructions and illustrations.
Date: September 12, 1899
Creator: Linch, Frank S.
System: The Portal to Texas History