Patents Assigned to The European Atomic Energy Community (EURATOM)
  • Patent number: 4405861
    Abstract: A secondary-electron detector for the analysis of irradiated samples in scanning electron microscopes and microprobes, including an electron collector 12 arranged along a curved or angular path, an electron accelerator 13, a scintillator 24, a light guide 27 and a photomultiplier 28. To enable more effective investigation of irradiated nuclear fuels and to improve the magnification power, a spectrometer 20 and a Wehnelt cylinder 25 are provided between the accelerator and the scintillator.
    Type: Grant
    Filed: August 20, 1981
    Date of Patent: September 20, 1983
    Assignee: European Atomic Energy Community (Euratom)
    Inventors: Giancarlo Giacchetti, Jurgen Ransch, Clive T. Walker
  • Patent number: 4384489
    Abstract: To monitor a nuclear fuel element or fuel elements located in a store, e.g. a pond in a swimming pool reactor, the store is illuminated ultrasonically using one or more transducers transmitting ultrasonic signals in one or more predetermined directions to obtain an output which, because it depends on the number and relative location of the fuel elements in the store, and the structure of the store itself is distinctive to the fuel elements or elements stored therein. From this distinctive output is derived an identity unique to the stored fuel element or elements and a reference signal indicative of the whole structure when intact, the reference signal and identity being recorded. Subsequent ultrasonic testing of the store and its contents under identical operating conditions produces a signal which is compared to the recorded reference signal and if different therefrom reveals the occurrence of tampering with the store and/or the fuel element or elements.
    Type: Grant
    Filed: April 8, 1980
    Date of Patent: May 24, 1983
    Assignee: European Atomic Energy Community (EURATOM)
    Inventors: Serge Crutzen, Claude Vinche, Elie Borloo, Wilhelm Buergers
  • Patent number: 4381954
    Abstract: A method of increasing the ductility of articles formed from a superplastic alloy, the superplastic alloy consisting of aluminium, from 5 to 10% by weight of calcium and at most 1% by weight of impurities, characterized in that these articles, after their superplastic forming, are heated for at least 30 minutes to a temperature of between 400.degree. C. and 600.degree. C.
    Type: Grant
    Filed: December 3, 1980
    Date of Patent: May 3, 1983
    Assignee: European Atomic Energy Community (EURATOM)
    Inventors: Giovanni Piatti, Giovanni Pellegrini
  • Patent number: 4362207
    Abstract: An integrated heat exchange and heat storage system using thermochemical reactions which comprises a first plurality of parallel adjacent tubes containing an element for storing and yielding heat; and a second plurality of tubes parallel to said first plurality of tubes and interposed therebetween and containing a fluid heat vehicle, the first and second plurality of tubes being disposed in a receptacle whose major axis extends parallel to the axis of the tubes, the voids between the various tubes being filled with a stagnant liquid serving to facilitate heat exchange between the fluid heat vehicle and the element for storing and yielding heat.
    Type: Grant
    Filed: July 14, 1980
    Date of Patent: December 7, 1982
    Assignee: European Atomic Energy Community (Euratom)
    Inventors: Flaviano Farfaletti-Casali, Umberto Buzzi, Leendert Nobel, Friedrich Reiter
  • Patent number: 4359903
    Abstract: A system, suitable for use as an identity seal for an object, such as a container for fissile material, comprises a body including a cap for fitting over one end of the object, and a recess which contains a material such as "ARALDITE" or aluminium acting as a matrix for a plurality of inclusions of e.g. bronze embedded therein in a random configuration. The recess is closed by a cover which includes a central electrically conductive part. Also embedded in the matrix material and constituting further "inclusions" are two piezoelectric crystal transducers each electrically connected to the central cover part. In use, the transducers are electrically connected via the central cover part to external ultrasonic testing apparatus to provide a unique output indicative of the particular structure of the seal particularly the inclusion configuration and hence providing a unique "identity" and hence indication of integrity for the seal.
    Type: Grant
    Filed: April 8, 1980
    Date of Patent: November 23, 1982
    Assignee: European Atomic Energy Community (EURATOM)
    Inventors: Serge Crutzen, Joseph Dal Cero, Rene Denis
  • Patent number: 4349716
    Abstract: The present invention relates to a mechanical control head for guiding the movement of a tool and particularly an electrode for electroerosion by means of a control rod with a forked end. The control has the following elements in combination: (a) a connection of the tool on a support terminating in a foot in the form of a spatula with tapered edge; (b) an articulated, centered connection of the foot in the forked end of a control rod, said rod presenting an annular shoulder spaced from the spatula-shaped foot and adapted to rotate about its axis and move in the axial direction; (c) a coaxial assembly of a hollow guide prism whose guide face, in contact with the tapered edge of the spatula-shaped foot, is cut obliquely, while the opposite face of the prism, perpendicular to the axis of the prism, rests on the shoulder of the control rod.
    Type: Grant
    Filed: December 9, 1980
    Date of Patent: September 14, 1982
    Assignee: European Atomic Energy Community (EURATOM)
    Inventor: Learco Di Piazza
  • Patent number: 4304645
    Abstract: A process for removing helium and other impurities from a mixture containing deuterium and tritium, which process comprises the steps of: separating from the mixture isotopes of hydrogen in any of their diatomic combined forms; oxidizing the separated isotopes to their corresponding oxides; separating tritium oxide and deuterium-tritium oxide from the oxides thus formed; and electrolyzing the separated oxides to deuterium and tritium.Preferably the impure mixture of deuterium and tritium is a waste product of a fusion reactor, and the purified deuterium/tritium mixture is recycled to the reactor.
    Type: Grant
    Filed: January 10, 1980
    Date of Patent: December 8, 1981
    Assignee: European Atomic Energy Community (Euratom)
    Inventor: Giancarlo Pierini
  • Patent number: 4300626
    Abstract: In a gas-controlled heat-pipe thermostat of high precision having a temperature-controlled chamber arranged at least partly within the evaporation and condensation cycle and a gas reservoir connected to said heat-pipe, the improvement comprising in that in the heat-pipe a cooling surface is arranged for the production of condensate which, for the scavenging of the surface of said temperature-controlled chamber in a directed manner, is connected to the outer wall of said chamber by liquid conducting capillary structures.
    Type: Grant
    Filed: February 9, 1978
    Date of Patent: November 17, 1981
    Assignee: European Atomic Energy Community (EURATOM)
    Inventors: Claus-Adolf Busse, Jean-Paul Labrande
  • Patent number: 4292521
    Abstract: A device for recovering information from overexposed regions of image recording emulsions in general, and radiographs in particular includes a light-tight housing the outer surface of which is covered with a layer of lead, a source arranged to project ionizing radiation within said housing, and a removeable cassette which, in use, carries the over-exposed radiograph in close contact with a further film for recording the information. The cassette has a light-tight cover which is displaceable to permit exposure of the further film to an image produced by irradiation of the over-exposed radiograph by the source. The method includes irradiating the over-exposed radiograph, placed in close contact with a further film, by means of a device as aforesaid.
    Type: Grant
    Filed: April 13, 1979
    Date of Patent: September 29, 1981
    Assignee: European Atomic Energy Community (EURATOM)
    Inventors: Fernand Luchtmans, Pierre Jehenson, Angelo Pisoni
  • Patent number: 4281709
    Abstract: The present invention relates to a thermal heat pump consisting of a heat pipe in which the vapor passage between the heat transfer zone to the heat supply and the heat transfer zone to the heat removal section has a cross section which varies across its length. The variable cross-sectional vapor passage first increases and then decreases the rate of vapor flow, and a further heat transfer zone with either heat supply or removal is located in the area of increased vapor velocity. The cross-sectional variation of the vapor passage in the heat pipe between the two outermost heat transfer zones is advantageously brought about by a displacement body arranged internally of the heat pipe with a particular surface contour.
    Type: Grant
    Filed: August 28, 1978
    Date of Patent: August 4, 1981
    Assignee: European Atomic Energy Community-EURATOM
    Inventor: Claus A. O. Busse
  • Patent number: 4259638
    Abstract: Apparatus including a superconducting magnetic assembly for inducing nuclear magnetic resonance within a flowing medium. In order to make nuclear magnetic resonance measurements on a flowing medium it is preferred to have separate polarizing and resonating fields situated consecutively along the flow path, with the magnetic flux density in the resonating region being reduced from that in the previous polarizing region.The signal to noise ratio in such a system is improved by increasing the magnetic flux density in the polarizing region as much as possible. Using superconducting coils to provide the magnetic fields a lighter assembly with increased polarizing field strength over that of an equivalent iron-cored electromagnet is obtained.
    Type: Grant
    Filed: October 6, 1978
    Date of Patent: March 31, 1981
    Assignee: European Atomic Energy Community (EURATOM)
    Inventor: Gottfried J. Krueger
  • Patent number: 4195523
    Abstract: An ultrasonic thermometer comprising a probe which is coupled to a magnetorestrictive transmitter and has discontinuities to reflect for each ultrasonic pulse applied to the probe a multiplicity of echoes of which the detection provides a measure of the ambient temperature of the probe. The probe is disposed in a tubular jacket. The probe and the jacket are separately anchored at respective ends, which may be proximate or remote, so that substantially all the probe moves relative to the jacket to rupture bridges or welds which may be formed between the probe and the jacket.
    Type: Grant
    Filed: July 21, 1978
    Date of Patent: April 1, 1980
    Assignee: European Atomic Energy Community (Euratom)
    Inventors: Herman A. Tasman, Ernst E. S. Patzold
  • Patent number: 4116264
    Abstract: A hollow toroidal assembly, for example a heat and radiation blanket for a nuclear fusion reactor, has an improved modular structure. The toroidal assembly is formed by a number of annular modules of at least two types, each module being subdivided into submodules. The modules are conically converging at the outer or inner circumferential side so that they are tightly mounted in an alternating configuration. When providing a blanket for a nuclear fusion reactor the toroidal assembly surrounds the toroidal plasma reaction cavity and provides efficient cooling or heat exchange through the modules. The toroidal assembly advantageously provides a convenient subdivision of the blanket surrounding a plasma cavity into a sufficient number of separate modules.
    Type: Grant
    Filed: November 5, 1974
    Date of Patent: September 26, 1978
    Assignee: European Atomic Energy Community (Euratom)
    Inventors: Falviano Farfaletti-Casali, Friedrich G. Peter, Peter G. Gritzmann
  • Patent number: 4104503
    Abstract: An apparatus for electroerosion within a solid component which includes a hollow stationary cylinder, a control rod surrounded by and coaxial with the cylinder, a driving square terminating one end of the rod and an electrode connected to said driving square. The electrode is pivotable around an axis perpendicular to the axis of the cylinder, movable together with the rod along the axis of the cylinder, positionable perpendicular to the axis of the cylinder and rotatable around the axis. The method comprises machining a pilot channel in the solid component having a cross-sectional identical with the aperture cross-section of the proposed cavity, introducing an electrode into the channel, moving the electrode relative to the solid component and removing material from the cavity so formed in the solid component.
    Type: Grant
    Filed: September 29, 1976
    Date of Patent: August 1, 1978
    Assignee: European Atomic Energy Community (Euratom)
    Inventors: Learco Di Piazza, Angelo Migoni
  • Patent number: 4103813
    Abstract: This invention relates to the closure of conditioned-atmosphere containers by magnewelding by means of an exploding coil. After packing, the containers are temporarily closed by a programming cap of elastic synthetic polymer adapted to fix the essential features of the geometric parameters concerned in the subsequent magnewelding operation.Specific application to the sealing of nuclear fuel cans.
    Type: Grant
    Filed: August 20, 1976
    Date of Patent: August 1, 1978
    Assignee: European Atomic Energy Community (Euratom)
    Inventor: Rene Pierre Debeir
  • Patent number: 4099107
    Abstract: An apparatus for controlling an AC-motor, with a feedback arrangement in which the feed-back signal is the output signal of a partly mechanical pulse generator coupled to the shaft of the motor, comprising a micro-processor to which is fed a feed-back signal and a reference signal and a digital clock which sends output signals to said micro-processor, said micro-processor generating signals through a first set of output controls for controlling the frequency and phase of the AC-power supplied to the motor by comparing the reference signal and the arrival times of the feed-back pulses as indicated by the digital clock.
    Type: Grant
    Filed: May 17, 1976
    Date of Patent: July 4, 1978
    Assignee: European Atomic Energy Community (EURATOM)
    Inventor: Josef Eder
  • Patent number: 4050408
    Abstract: A method and apparatus for depositing thin layers of insulating or slightly conductive materials involves reactive spraying through high-frequency inductive plasma. The conductive component of the material to be deposited is sprayed in a first chamber through which an ionizable inert gas travels, the sprayed particles then passing through a second chamber in which a substrate is placed and to which a reactive gas is supplied.Insulating and weakly inductive materials such as oxides, carbide and nitrides may be deposited at a rate substantially comparable with the rate for conductive materials to obtain high quality uniform deposits.
    Type: Grant
    Filed: November 19, 1975
    Date of Patent: September 27, 1977
    Assignee: European Atomic Energy Community (EURATOM)
    Inventor: Pierre Beucherie
  • Patent number: 4004165
    Abstract: A piezo electric signal generator and receiver assembly for a flaw detector has a generator adjacent to the crystal transducer and a cable connection to a distant point where a d.c. power supply and the indicator is located. The same cable is used for supplying power to the generator and for conveying to the indicator signals corresponding to both acoustic transmitted pulses and reflected returns. For this purpose a charging voltage is applied to a series circuit comprising the capacitor and crystal and this circuit is discharged by a switch connected to the capacitor at the input end of the charging circuit. Both transmitted and received signals are fed in the same direction through the cable and are therefore subjected to the same delays.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: January 18, 1977
    Assignee: European Atomic Energy Community (Euratom)
    Inventors: Ivo Leo Bredael, Fulvio Laghi
  • Patent number: 3995494
    Abstract: An automatic sampling device for atmospheric probes to check the propagation of noxious airborne substances. A pump feeds a distributor having a bore therethrough which is pivotably mounted in a circular housing having a plurality of necks extending radially outwardly for the attachment of plastic bags to catch samples of air delivered thereto by the distributor.
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: December 7, 1976
    Assignee: European Atomic Energy Community (Euratom)
    Inventors: Karl H. Muller, Andre E. Sieffert
  • Patent number: 3983036
    Abstract: A method and device for unclogging filter cloths for use in filter apparatus particularly apparatus of the kind wherein the cloth describes a closed loop between a filtering station and an unclogging station.Gas is ejected from one or more nozzles through the cloth which is vibrated at a sonic and/or ultrasonic frequency at a location opposite the nozzle ejection head. The cloth is simultaneously stretched at the same location into a projecting shape having leading and trailing edges with a length, in the direction of motion of the cloth, of not more than three times their height in the direction perpendicular to the direction of motion of the cloth.
    Type: Grant
    Filed: November 19, 1973
    Date of Patent: September 28, 1976
    Assignee: European Atomic Energy Community (Euratom)
    Inventors: Jean Lauzeral, Christian Laville