Patents Examined by Archie R. Borchelt
  • Patent number: 4410802
    Abstract: Vertical drilling of cylindrical holes in the soil, and the lining of such holes, provides storage vaults called caissons. A guarded depot is provided with a plurality of such caissons covered by shielded closures preventing radiation from penetrating through any linear gap to the atmosphere. The heat generated by the radioactive material is dissipated through the vertical liner of the well into the adjacent soil and thus to the ground surface so that most of the heat from the radioactive material is dissipated into the atmosphere in a manner involving no significant amount of biologically harmful radiation. The passive cooling of the radioactive material without reliance upon pumps, personnel, or other factor which might fail, constitutes one of the most advantageous features of this system. Moreover this system is resistant to damage from tornadoes or earthquakes.Hermetically sealed containers of radioactive material may be positioned in the caissons.
    Type: Grant
    Filed: April 15, 1976
    Date of Patent: October 18, 1983
    Inventor: Milton J. Szulinski
  • Patent number: 4157473
    Abstract: Direct fast-neutron-induced recoil and alpha particle tracks in polycarbonate films may be enlarged for direct visual observation and automated counting procedures employing electrochemical etching techniques. Electrochemical etching is, for example, carried out in a 28% KOH solution at room temperature by applying a 2000 V peak-to-peak voltage at 1 kHz frequency. Such recoil particle amplification can be used for the detection of wide neutron dose ranges from 1 mrad. to 1000 rads. or higher, if desired.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: June 5, 1979
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Mehdi Sohrabi
  • Patent number: 4153840
    Abstract: A combustion product detector comprises two ionization chambers with a radioactive source in each chamber. One chamber is vented to the ambient atmosphere and the other serves as a reference. A communicating passage is provided between the chambers. An adjustable target is provided in the reference chamber.Test means to determine status of the device comprises a member having a conductive end which is normally in conductive relation with the vented electrode of the chamber. It may be manually depressed into the vented chamber against a biasing force to disconnect it.Two radioactive sources are mounted in a holder which provides a window for each of the sources. In different embodiments the windows may be varied in size to vary the amount of radiation provided to each of the chambers independently without changing the parameters of the sources themselves.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: May 8, 1979
    Inventor: Horst K. Wieder
  • Patent number: 4121101
    Abstract: In Reiss chamber method or ionography, or in a method of modification or combination of these methods wherein an electrostatic latent image of an object irradiated with radiations such as X-rays is formed on an insulating image recording layer, a photoconductive material is used as the image recording layer. The charge carried on the photoconductive image recording layer is partly neutralized by the radiations received thereby. In an embodiment, a fluorescent layer is attached to the photoconductive image recording layer to accelerate the neutralization of the charge when the recording layer is exposed to the radiations. In another embodiment, the photoconductive material has a property that the photoconductivity increases as the strength of an electric field applied thereacross increases, and the image recording layer made of such a photoconductive material is uniformly exposed to light simultaneously with or after the irradiation of the radiations.
    Type: Grant
    Filed: November 22, 1976
    Date of Patent: October 17, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Seiji Matsumoto, Isoji Takahashi, Takao Komaki, Masamitsu Ishida, Tomotaka Kozeki, Kazuo Horikawa, Kozi Shimanuki
  • Patent number: 4121103
    Abstract: An inspection system for detecting the presence of an aqueous base solution in the bottom of a container including means disposed relative to the container for directing energy including at least energy in the infrared region through the bottom of the container and along the central axis of the container, and means disposed relative to the container for detecting the energy of particular infrared wavelengths passing from the bottom of the container and for producing signals in accordance with such detection and with the presence of an aqueous base solution providing for the absorption of the energy at the particular infrared wavelengths and with the absence of an aqueous base solution allowing for the passage of the energy at the particular infrared wavelengths.
    Type: Grant
    Filed: November 5, 1976
    Date of Patent: October 17, 1978
    Assignee: Industrial Dynamics Company, Ltd.
    Inventor: Fredrick L. Calhoun
  • Patent number: 4121106
    Abstract: An ion chamber type neutron detector is disclosed which has a greatly extended lifespan. The detector includes a fission chamber containing a mixture of active and breeding material and a neutron shielding material. The breeding and shielding materials are selected to have similar or substantially matching neutron capture cross-sections so that their individual effects on increased detector life are mutually enhanced.
    Type: Grant
    Filed: February 8, 1977
    Date of Patent: October 17, 1978
    Assignee: General Electric Company
    Inventors: James H. Terhune, John P. Neissel
  • Patent number: 4119852
    Abstract: A solid detector for detecting the presence of ionizing radiation in the noise of the detector crystal. For this purpose, the device provides for the generation, at the moment of each of pulses of the ionizing radiation, of signals which open a gate towards a level selector. The device comprises a semiconductor, provided with microchannels where electrons are multiplied by means of secondary emission, and a collector of the electrons generated in the microchannels. The signals which open the gate are generated by the secondary electrons issuing from the microchannels and picked up by the collector.
    Type: Grant
    Filed: January 25, 1977
    Date of Patent: October 10, 1978
    Assignee: Thomson-CSF
    Inventor: Henri Rougeot
  • Patent number: 4119847
    Abstract: A radioactivity well logging tool including a gamma radiation detector is field calibrated with the help of a flexible sheet having a radioactive substance dispersed therein, which is wrapped about the tool so as to completely surround the detector. The sheet is made of an elastomer such as polyurethane, and the radioactive substance is carnotite. This sheet is placed within a nylon sheath which has straps for holding the calibrator wrapped around the tool.
    Type: Grant
    Filed: October 28, 1976
    Date of Patent: October 10, 1978
    Assignee: Schlumberger Technology Corporation
    Inventor: James A. Waggoner
  • Patent number: 4119841
    Abstract: In a scanner for producing a sectional view of a body spatially resolving semiconductors, each having a charge transfer element associated therewith at which the formation of the signal is accomplished by charge storage and charge transfer in a semiconductor body, are utilized.
    Type: Grant
    Filed: March 29, 1976
    Date of Patent: October 10, 1978
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ottomar Jantsch, Karl Reiss
  • Patent number: 4118632
    Abstract: The invention relates to a nuclear medical diagnostic instrument for the determination of the distribution pattern of substances emitting gamma quanta and inserted in a body, which consists essentially of a detector with a localization arrangement and two or more multi-channel collimator elements placed in front of the detector.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: October 3, 1978
    Inventor: Heribert Luig
  • Patent number: 4117332
    Abstract: A circuit improvement is disclosed for use in an electron capture detector of the type including an electron capture cell, means for applying polarization pulses to the cell to derive a cell current, means for varying the pulse rate to maintain the cell current constant, and means for converting the pulse frequency to an analog signal indicative of the concentration of an electron-capturing component.
    Type: Grant
    Filed: February 26, 1976
    Date of Patent: September 26, 1978
    Assignee: Varian Associates, Inc.
    Inventors: John Robert Felton, Russell S. Gutow, Jr.
  • Patent number: 4110616
    Abstract: A pyroelectric detector which includes at least one pyroelectric element consisting of a pyroelectric material sandwiched between first and second electrodes, and a semiconductor chip having a field effect transistor formed on one surface thereof and having an electrical contact for the gate electrode of the transistor formed on the surface thereof, opposite to said one surface, the gate electrode contact of the chip being secured in electrical contact to the first one of the electrodes of the pyroelectric element, the size of the chip being such that a major portion of the first electrode is not covered by the chip.
    Type: Grant
    Filed: January 14, 1977
    Date of Patent: August 29, 1978
    Assignee: Plessey Handel und Investments A.G.
    Inventors: Stephen G. Porter, David Appleby
  • Patent number: 4107533
    Abstract: An apparatus for measuring concentration of radioactivity in a fluid circulating in a cooling system or a disposal system, etc. of a nuclear power plant (e.g. coolant), the apparatus having a plurality of sampling tubes with different diameters depending on the intensities of radioactivity, and the sampling tubes having valves for switching from one fluid to another fluid. The sampling tubes are connected to the system to a discharge pipe, and are disposed in the proximity of a radiation detector adapted to issue a signal representative of radiation. The issued signal is supplied to a multichannel pulse height analyzer and a data processing system providing an indication of the concentrations of radioactivities for respective radionuclides.
    Type: Grant
    Filed: October 20, 1976
    Date of Patent: August 15, 1978
    Assignee: Hitachi, Ltd.
    Inventors: Hideho Tabuchi, Akira Ogushi
  • Patent number: 4105918
    Abstract: An apparatus wherein a thermoluminescent type radiation dosimeter is heated and thermoluminant rays emitted from the dosimeter are measured. It is constructed in such manner that to perform the measurement a personal identification card must be inserted to the apparatus. The mark on the dosimeter and the mark on the identification card are collated, and only when they coincide with each other is the measurement performed.
    Type: Grant
    Filed: September 28, 1976
    Date of Patent: August 8, 1978
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Katsuhiko Miyagawa, Hidenori Kunishige, Hirotaka Otsuka, Fusafumi Nakao
  • Patent number: 4104522
    Abstract: An apparatus for measuring the weight per unit length of a cigarette rod has a radioactive source to one side of the rod and a detector to the other side of the rod. The source emits a beam of radiation through the rod to the detector. Guide tubes, having air ducts, are located on both sides of the beam. Pressurized air is introduced into the tubes via the air ducts to maintain the rod centrally within the tubes.
    Type: Grant
    Filed: March 14, 1977
    Date of Patent: August 1, 1978
    Assignee: Measurex Corporation
    Inventor: Peter William Rees
  • Patent number: 4104523
    Abstract: There is provided an improved radon-222 detector device for counting alpha particles originating from radon-222 gas including an alpha particle permeable window in one end of a body and a surface barrier type semiconductor detector adjacent thereto and spaced from the window, and characterized by a moisture attenuating means adjacent the window and the detector.
    Type: Grant
    Filed: October 6, 1976
    Date of Patent: August 1, 1978
    Assignee: Martin Marietta Corporation
    Inventor: Ludwig G. Wolfert
  • Patent number: 4103162
    Abstract: The present invention relates to an apparatus for continuously measuring the concentration of oil in a water sample by the infra-red absorption method. The apparatus comprises a supplying device which supplies an oil-containing water sample and a supplying device which supplies a solvent for extracting the oil in the sample, each of said water sample and solvent being supplied in a controlled and continuous amount, an extractor connected to said supplying device having an agitator therein, which extractor receives said oil-containing water sample and solvent and serves to extract the oil component in the water sample with the solvent.
    Type: Grant
    Filed: December 10, 1976
    Date of Patent: July 25, 1978
    Assignee: Horiba, Ltd.
    Inventors: Michinori Iwamoto, Toshiyuki Nomura
  • Patent number: 4103173
    Abstract: A fluorescent screen whose fluorescent material is a pure rare earth compd such as a compound of the formulas (A.sub.2 O).sub.a (Ln.sub.2 O.sub.3).sub.b (P.sub.2 O.sub.5).sub.c, (Ln.sub.2 O.sub.3).sub.p (Al.sub.2 O.sub.3).sub.q (B.sub.2 O.sub.3).sub.r, or LnZrF.sub.7 wherein a is zero or an integer greater than zero, b, c, p, q, and r are integers greater than zero, A is at least one alkali metal, and Ln is at least one rare earth metal.
    Type: Grant
    Filed: February 19, 1976
    Date of Patent: July 25, 1978
    Assignee: Max Planck Gesellschaft zur Forderung der Wissenschaften e. V.
    Inventors: Hans-Gunter Danielmeyer, Werner Hartmann
  • Patent number: 4103164
    Abstract: A portable gamma radiation dose rate meter suitable for use over 3 or 4 decades over the dose rate range 0.1 mR/hr and 1000 R/hr which incorporates an ion chamber or other radiation detector and a null deflection readout system using a calibrated potentiometer and two single light emitting diodes as high and low indicators.
    Type: Grant
    Filed: January 14, 1977
    Date of Patent: July 25, 1978
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National Defence
    Inventor: Philip C. East
  • Patent number: 4103172
    Abstract: The invention relates to light sources and, in particular, to light sources for use in navigational aids such as lighthouses and lighted buoys.In more detail, the light source of the present invention comprises a radio isotope fuel source, thermal insulation against heat loss, a biological shield against the escape of ionizing radiation, a material having a surface which attains incandescence when subject to isotope decay heat and means for transferring energy from the insulated fuel source to produce incandescence of the surface and thereby emit light.
    Type: Grant
    Filed: March 26, 1976
    Date of Patent: July 25, 1978
    Assignee: AGA Navigation Aids Ltd.
    Inventors: Nigel Lawrence Spottiswoode, David John Ryden