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High-efficiency photoionization detector

Description: 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 pr… more
Date: May 12, 1981
Creator: Anderson, D.F.
Partner: UNT Libraries Government Documents Department
open access

pH meter probe assembly

Description: 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 c… more
Date: June 12, 1981
Creator: Hale, C.J.
Partner: UNT Libraries Government Documents Department
open access

Method for cleaning solution used in nuclear-fuel reprocessing.

Description: 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 … more
Date: May 12, 1981
Creator: Tallent, O. K.; Dodson, K. E. & Mailen, J. C.
Partner: UNT Libraries Government Documents Department
open access

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

Description: 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 b… more
Date: May 12, 1981
Creator: Kenney, W. J.
Partner: UNT Libraries Government Documents Department
open access

Clutch Driven Reaction Wheel Steering Unit

Description: Patent relating to a clutch driven reaction wheel steering unit.
Date: January 12, 2006
Creator: Smith, Monty J. & Maestas, Jeffrey E.
Partner: UNT College of Engineering
open access

Self-Anchoring Mast for Deploying a High-Speed Submersible Mixer in a Tank

Description: A self-anchoring mast for deploying a high-speed submersible mixer in a tank includes operably connected first and second mast members (20, 22) and a foot member 46 operably connected to the second mast member for supporting the mast in a tank. The second mast member includes a track (36, 38) for slidably receiving a bearing of the mixer to change the orientation of the mixer in the tank.
Date: October 12, 2004
Creator: Cato, Joseph E. Jr.; Shearer, Paul M. & Rodwell, Philip 0.
Partner: UNT Libraries Government Documents Department
open access

Method of preparing high-temperature-stable thin-film resistors

Description: A chemical vapor deposition method for manufacturing tungsten-silicide thin-film resistors of predetermined bulk resistivity and temperature coefficient of resistance (TCR) is disclosed. Gaseous compounds of tungsten and silicon are decomposed on a hot substrate to deposit a thin-film of tungsten-silicide. The TCR of the film is determined by the crystallinity of the grain structure, which is controlled by the temperature of deposition and the tungsten to silicon ratio. The bulk resistivity is … more
Date: November 12, 1980
Creator: Raymond, L. S.
Partner: UNT Libraries Government Documents Department
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