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Method and apparatus for injecting a substance into the bloodstream of a subject
An apparatus and method for injecting a substance, such as a radiopharmaceutical, into the bloodstream of a subject is described. The apparatus comprises an injection means, such as a servo controlled syringe, a means for measuring the concentration of that substance in the subject's bloodstream, and means for controlling the injection in response to the measurement so that the concentration of the substance follows a predetermined function of time. The apparatus of the subject invention functions to inject a substance into a subject's bloodstream at a rate controlled by an error signal proportional to the difference between the concentration of the substance in the subject's bloodstream and the predetermined function.
Date:
May 29, 1981
Creator:
Lambrecht, R. M.; Bennett, G. W.; Duncan, C. C. & Ducote, L. W.
System:
The UNT Digital Library
Production of super-smooth articles
Super-smooth rounded or formed articles made of thermoplastic materials including various poly(methyl methacrylate) or acrylonitrile-butadiene-styrene copolymers are produced by immersing the articles into a bath, the composition of which is slowly changed with time. The starting composition of the bath is made up of at least one solvent for the polymer and a diluent made up of at least one nonsolvent for the polymer and optional materials which are soluble in the bath. The resulting extremely smooth articles are useful as mandrels for laser fusion and should be useful for a wide variety of other purposes, for example lenses.
Date:
May 29, 1981
Creator:
Duchane, D. V.
System:
The UNT Digital Library
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
Long-range-ordered alloys modified by Group IV-B metals
Ductile long range ordered alloys having high critical ordering temperatures exist in the (V,M)(Fe,Ni,Co)/sub 3/ system having the composition comprising by weight 20.6 to 22.6% V, 14 to 50% Fe, 0 to 64% Co, and 0 to 40% Ni, and 0.4 to 1.4% M, where M is a metal selected from the group consisting of Ti, Zr, Hf, and their mixtures. These modified alloys have an electron density no greater than 8.00 and exhibit marked increases at elevated temperature in ductility and other mechanical properties over previously known ordered alloys.
Date:
May 22, 1981
Creator:
Liu, Chain T.; Inouye, Henry & Schaffhauser, Anthony C.
System:
The UNT Digital Library
Automatic voltage-imbalance detector
A device is described for indicating and preventing damage to voltage cells such as galvanic cells and fuel cells connected in series by detecting sequential voltages and comparing these voltages to adjacent voltage cells. The device is implemented by using operational amplifiers and switching circuitry is provided by transistors. The device can be utilized in battery powered electric vehicles to prevent galvanic cell damage and also in series connected fuel cells to prevent fuel cell damage.
Date:
May 20, 1981
Creator:
Bobbett, R. E.; McCormick, J. B. & Kerwin, W. J.
System:
The UNT Digital Library
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
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
Detonator-activated ball shutter
A detonator-activated ball shutter for closing an aperture in about 300 ..mu..seconds is disclosed. The ball shutter containing an aperture through which light, etc., passes, is closed by firing a detonator which propels a projectile for rotating the ball shutter, thereby blocking passage through the aperture.
Date:
May 14, 1981
Creator:
McWilliams, R. A. & Von Holle, W. G.
System:
The UNT Digital Library
Catalytic-cartridge SO/sub 3/ decomposer
A catalytic cartridge internally heated is utilized as a SO/sub 3/ decomposer for thermochemical hydrogen production. The cartridge has two embodiments, a cross-flow cartridge and an axial flow cartridge. In the cross-flow cartridge, SO/sub 3/ gas is flowed through a chamber and incident normally to a catalyst coated tube extending through the chamber, the catalyst coated tube being internally heated. In the axial-flow cartridge, SO/sub 3/ gas is flowed through the annular space between concentric inner and outer cylindrical walls, the inner cylindrical wall being coated by a catalyst and being internally heated. The modular cartridge decomposer provides high thermal efficiency, high conversion efficiency, and increased safety.
Date:
May 22, 1981
Creator:
Galloway, Terry R.
System:
The UNT Digital Library
High-energy-overcurrent protective device
Electrical loads connected to capitance elements in high voltage direct current systems are protected from damage by capacitance discharge overcurrents by connecting between the capacitance element and the load, a longitudinal inductor comprising a bifilar winding wound about a magnetic core, which forms an incomplete magnetic circuit. A diode is connected across a portion of the bifilar winding which conducts a unidirectional current only. Energy discharged from the capitance element is stored in the inductor and then dissipated in an L-R circuit including the diode and the coil winding. Multiple high voltage circuits having capacitance elements may be connected to loads through bifilar windings all wound about the aforementioned magnetic core.
Date:
May 18, 1981
Creator:
Praeg, W. F.
System:
The UNT Digital Library
Front Truck for Planters &c.
Patent for a front truck for planters, which can be used for steering the machine.
Date:
May 24, 1910
Creator:
Brim, Isaac D.
System:
The Portal to Texas History
Closer for Cans and the Like.
Patent for an efficient, easy-open-and-close top for various types of cans which are used frequently.
Date:
May 28, 1912
Creator:
Perkins, William Hunter
System:
The Portal to Texas History
Antifriction-Bearing.
Patent for certain new and useful improvements in antifriction bearings for " the ends of the hub and means for eluding dust fro the bearings" (line 11 -13).
Date:
May 10, 1898
Creator:
Hobron, Charles B.
System:
The Portal to Texas History
Car-Door Cleat.
Patent for certain new and useful improvements in car door cleats or guards, including instructions and illustrations.
Date:
May 30, 1899
Creator:
Miller, William M.
System:
The Portal to Texas History
Automatic Vehicle - Brake.
Patent for a new and improved automatic vehicle brake.
Date:
May 10, 1898
Creator:
Elliott, Joseph Samuel
System:
The Portal to Texas History
Acetylene Gas Generator
Patent for an acetylene gas generator. Illustration included.
Date:
May 2, 1905
Creator:
Pruitt, George Holditch & Pruitt, Conrad D.
System:
The Portal to Texas History
Bed Rail Fastener
Patent for a bed rail fastener. "The purpose of this invention is to provide novel features of construction for a bed rail fastener, which afford a very secure connection of the ends of the side rails of a metal bedstead with the head and foot posts of the bed." (lines 9-14). Illustration included.
Date:
May 11, 1909
Creator:
Berry, Thomas O.
System:
The Portal to Texas History
Cultivating Machine
Patent for a cultivating machine. Illustration included.
Date:
May 17, 1904
Creator:
Gray, Albert
System:
The Portal to Texas History
Building Construction
Patent for metal beams used in building construction that have perforated plates to allow the passage of concrete through the plate when the metal piece is embedded in concrete thus strengthening the attachment of the metal and the concrete.
Date:
May 14, 1907
Creator:
Keyser, William H.
System:
The Portal to Texas History
Aeroplane
Patent for an aeroplane that uses centrifugal blowers to ensure a safe and practicable flight. Illustrations included.
Date:
May 26, 1908
Creator:
Judson, Fred I.
System:
The Portal to Texas History
Clothes Pounder
Patent for a clothes pounder. Illustration included.
Date:
May 17, 1910
Creator:
Turner, James S. & Campbell, John Luther
System:
The Portal to Texas History
Design for a Hame Attachment.
Design patent for a hame attachment that is symmetrical in configuration making it adaptable to be used in either the right or left hand.
Date:
May 9, 1899
Creator:
Surghnor, Daniel H.
System:
The Portal to Texas History
Broom-Rack.
Patent for a new and useful broom rack, including instructions and illustrations.
Date:
May 31, 1898
Creator:
Smith, Walter I.
System:
The Portal to Texas History
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