Vorrichtung zum Abschneiden von zueinander koaxialen Rohren

Improvements in nuclear reactor fuel rod desheathing machines

... 958,598. Shearing; bending. COMMISSARIAT A L'ENERGIE ATOMIQUE. Sept 19, 1961 [Sept. 19, 1960], No. 33519/61. Headings B3E and B3W. [Also in Division G6] A machine for removing the sheath of a fuel element in which there is initially a slight radial play between the sheath and the enclosed rod of fissile material, comprises a pair of rollers 1, 2 driven synchronously in the directions 14, 15 and profiled to form a groove 9 with an opening 10, the fuel element being advanced by a jack (not shown) towards the groove. The groove 9 has a radius midway between that of the sheath and rod, whereby the sheath is deformed to form a longitudinal fold in the opening 10 which is slit by a cutting tool 12. As the fuel element advances the slit is progressively widened by a beak-shaped member 16 followed by a body 17 of conical shape. The sheath 18 is then progressively flattened by rollers 20, 21, 22 and leaves by an exit 24, the rod leaving through an exit 23.

Improvements in nuclear magnetometers of the type making use of a high frequency pumping on an electronic transition

... 984, 826. Magnetic tests. COMMISSARIAT A L'ENERGIE ATOMIQUE. July 14, 1961 [July 18, 1960], No. 25705/61. Heading G1N. In a magnetometer of the nuclear resonance type a sample vessel containing the resonance material is disposed between the inner and outer conductors of a short-circuited coaxial line in the vicinity of a magnetic antinode, the line being energized at radio frequency to provide a polarizing magnetic field, and means are provided for measuring the nuclear precession frequency. In Fig. 1 the sample vessel comprises two insulating cylinders 2, 4a joined at each end to form an enclosure containing, for example, an aqueous solution of a paramagnetic salt such as potassium nitrosodisulfonate. The outer cylinder and one end closure are provided with a thin coating of copper or silver forming the outer conductor of a coaxial line; the inner conductor comprises a tube 1 extending through the inner cylinder 2 and joined at one end to a conducting plate 1c which makes contact with ...

MAGNETIC DEMAGNETIZING DEVICES

Mechanism to measure weak magnetic fields

METHODS AND DEVICES FOR THE AUTOMATIC CALCULATION OF CORRELATION FUNCTIONS

PROCESS OF OPERATION OF AND WINDOW FOR A HIGH-ACTIVITY CELL

MAGNETIC RESONANCE APPARATUS FOR MEASURING MAGNETIC FIELDS

Antenna ultra high frequency with slit with structure low thickness

L'antenne de l'invention a une structure "triplaque suspendu" à deux plaques métalliques (26, 27) enserrant un film diélectrique (28). Dans cette structure on pratique un canal pour une ligne d'alimentation (31) d'une fente (34), l'extrémité du conducteur central (32) de la ligne pénétrant dans une cavité dont l'épaisseur est sensiblement égale à celle du canal, la fente étant pratiquée dans la paroi supérieure de la cavité The antenna of the invention has a "suspended triplate" structure with two metal plates (26, 27) enclosing a dielectric film (28). In this structure, a channel is formed for a supply line (31) of a slot (34), the end of the central conductor (32) of the line penetrating into a cavity whose thickness is substantially equal to that of the channel, the slot being made in the upper wall of the cavity

Machine Tool for Cutting an Assembly of Coaxial Tubes into Parts, Particularly the Channels of a Pressure-Tube Nuclear Reactor.

... 1,157,473. Dividing. EUROPEAN ATOMIC ENERGY COMMUNITY (EURATOM). 18 Nov., 1966 [23 Nov., 1965], No. 51719/66. Heading B3W. A tube-cutting machine of the type having at least three co-planar rotatable bevel-edged discs supported around and equidistantly from the axis of the tube, which is perpendicular to the plane containing the discs, means for displacing the discs towards and away from the axis and means for effecting relative rotation between the discs and the tube to be cut, is characterized in that there is a sleeve coaxial with and surrounding the tube, the sleeve being coupled to the discs for relative rotation therewith and having windows through which the discs project inwardly to engage the tube, the discs being carried on independently removable supports and there being a tube gripping vice having jaws which open and close in the manner of an iris diaphragm. A motor 1 drives a shaft 2a on which are secured a gear-wheel 5 and one part of an electromagnetic clutch 4, the other ...

NUCLEAR MAGNETOMETERS OF THE TYPE MAKING USE OF A HIGH FREQUENCY PUMPING ON AN ELECTRONIC TRANSITION

NUCLEAR INDUCTION MAGNETOMETER

Demagnetising devices

... 893,609. Demagnetizing apparatus; control systems for electromagnets. COMMISSARIAT A L'ENERGIE ATOMIQUE. Aug. 21, 1959 [Aug. 30, 1958], No. 28639/59. Classes 35 and 38 (4). A demagnetizing coil is energized from an A.C. supply via two transformers interconnected by an electronic control network by which the coil current is maintained symmetrical and its amplitude may be progressively reduced. The coil, not shown, is connected to transformer 3 at terminals 2. The control network comprises a valve 13 and two germanium diodes 18, 19 connected as shown, so that each of two primary windings 7, 8 on the output transformer 3 carry current on alternate half-cycles. A compensating circuit 9, comprising variable resistors and capacitors, is connected between additional transformer windings 10, 11 to provide phase and amplitude correction for stray coupling between the various windings. As shown, the valve is used as a diode, the output being reduced by switching off the heater supply, but alternatively ...

METHODS OF MEASURING WEAK MAGNETIC FIELDS BY NUCLEAR INDUCTION

Perfectionnements aux procédé et dispositifs de mesure des champs magnétiques faibles, notamment du champ magnétique terrestre, par induction nucléaire

Improvements in devices for measuring small magnetic fields,in particular the earth magnetic field,by nuclear induction

... 964,017. Nuclear magnetic resonance apparatus. COMMISSARIAT A L'ENERGIE ATOMIQUE. July 3, 1961 [July 5, 1960: July 18, 1960], No. 23974/61. Heading G1N. In a free precession magnetometer using a solution containing atomic nuclei having a definite gyromagnetic ratio different from zero and paramagnetic ions with an unpaired electron having a saturable electronic resonance line at a frequency different from zero when in a magnetic field tending to zero in which an alternating field is applied to saturate the electronic resonance line of the latter and the unidirectional polarising field is of the same order of intensity as the field to be measured (one to ten times) a switching arrangement is provided to connect a D.C. source to the polarising field coil to quickly transfer the coil to an energy dissipating circuit and then to a frequency measuring circuit, the switching arrangement being controlled so that the period of connection of the source to the coil is of the same order as or of the ...

Improvements in or relating to high-activity cells

The inspection window of a cell in which glass-opacifying radiations are being emitted comprises two identical glass slabs 6, 7, assembled edge to edge; two screens of a thickness such as to reduce the radiation level to below an opacification threshold are arranged one on either side of a window opening; the two glass slabs can be reciprocated as a unit so that first slab 6 is in front of the window opening while slab 7 is located between a screen and the cell wall, and then vice-versa. The slab which is in front of the window opening gradually discolours due to radiation, but while it is in its displaced (i.e. screened) position, it gradually regenerates. Fig. 1 shows the concrete wall 1 of a cell in which radioactive processes are taking place, and having a window which comprises fixed glass slabs 2, 3, 4, and a movable slab which is formed by two glass plates 6, 7 placed edge to edge. These can move laterally within a slot 5, so that one or other is in the path of ...

MAGNETIC RESONANCE APPARATUS FOR MEASURING MAGNETIC FIELDS, IN PARTICULAR THE EARTH'S MAGNETIC FIELD

WINDOW ASSEMBLY FOR HIGH ACTIVITY CELLS AND THE LIKE

Vorrichtung zur selbsttaetigen Berechnung von Korrelationsfunktionen

Sausage and fresh product loading machine for meat curing installation, has zone permitting manual positioning of sausage tie on chisel clamp supporting modules, and path permitting relative displacement of clamp with respect to module

The machine has a zone permitting the manual positioning of tie of sausage (S) on a chisel clamp supporting module (1) that moves along outer, continuous and closed guiding path. The tie is hooked and suspended between the module and an associated chisel clamp (2) in order to be translated from a sausage loading position to a position in which the tie is threaded around a bar. Another guiding path assures actuating and guiding functions and permits relative displacement of the clamp with respect to the corresponding module along operative phase and position.

Vorrichtung zur Messung magnetischer Felder

Device for the measurement of magnetic fields, even very small, and in particular of the earth's magnetic field

... 961,590. Magnetic testing apparatus. COMMISSARIAT A L'ENERGIE ATOMIQUE. Dec. 15,1959 [Dec. 16, 1958] , No. 42671/59. Addition to 888,439. Heading G1N. The efficiency and accuracy of the nuclear resonance magnetometer disclosed in the parent Specification is improved by providing a conducting shield between the high frequency coil which saturates the electronic resonance band of the paramagnetic substance and the low frequency coil which collects energy at the Larmor frequency, the shield eliminating magnetic coupling between the two coils. The shield is constructed so as to be opaque to the high frequency but transparent to the low frequency and is of tubular form, the high frequency coil being disposed within the shield and the low frequency coil being on the shield exterior. To prevent the formation of eddy currents in the shield it has a slot extending along its length and a number of transverse slots extending substantially at right angles to the first mentioned slot. A method of constructing ...

Carrier for transportation of radioactive materials

... 1,130,762. Shielded containers for radioactive material. EUROPEAN ATOMIC ENERGY COMMUNITY. 17 May, 1966 [18 May, 1965], No. 21953/66. Heading B4Q. A transport flask comprises a container 1 having thick lead walls and provided with fins 2, the container being bolted to a platform 3 and surrounded at its sides and top by a box-like cover 5 having an open lower end, this cover also being bolted to the platform. The cover 5 is formed by a framework of beams 7, 8 and each of its sides and top consists of a thick layer 9 of heat insulation material. The lower edge of each side of the cover has a row of six holes 11 and the top of the cover has four rows of six holes (11a) (Fig. 3, not shown), these holes communicating with the air space between the container 1 and cover 5 to permit a natural convection circulation of air to cool the container. In the event of a fire external to the flask, the holes are automatically closed by sliding shutters 13 biased at one end by a spring 16 and retained at ...

Methods of measuring weak magnetic fields by nuclear induction

... 941,310. Magnetic tests. COMMISSARIAT A L'ENERGIE ATOMIQUE. Dec. 17, 1959 [Dec. 23, 1958], No. 42909/59. Heading G1N. Apparatus for measuring weak magnetic fields by measuring the frequency of nuclear precession of the protons of a sample of liquid containing dissolved in it a paramagnetic impurity having a line of electronic resonance having hyperfine structure, comprises first and second windings, the axes of which are mutually perpendicular and perpendicular to the direction of the field to be measured, means for applying a high-frequency alternating voltage to the first winding to produce a magnetic field to saturate said electronic resonance line, means for applying a direct voltage to the second winding to produce a weak polarising magnetic field, means for rapidly suppressing the polarising magnetic field in a short time compared with the duration of nuclear precession of the protons, when the direct voltage is cut off, and means for connecting the second winding to a frequency measuring ...

Apparatus for measuring magnetic fields

... 961,850. Magnetic testing apparatus. COMMISSARIAT A L'ENERGIE ATOMIQUE. Dec. 15, 1959 [Dec. 16, 1958], No. 42672/59. Addition to 888,439. Drawings to Specification. Heading G1N. The self-oscillatory circuit resonant at the Larmor frequency comprising the coil 13 shown Fig. 4 of the parent Specification is shunted by a network having an input admittance constituted by a negative conductance and a susceptance, means being provided for automatically varying the value of the conductance in dependence upon the amplitude of the oscillations delivered by the resonant circuit such that the absolute value of the conductance is a decreasing function of the amplitude, and means for rendering negligible the value of the susceptance. The arrangement facilitates tuning of the circuit and increases the precision of measurement of the Larmor frequency. The network comprises essentially an amplifier having a first amplification stage with a variable gain, a second amplification stage and an adjustable feedback ...

METHODS AND DEVICES PERMITTING AUTOMATIC CALCULATION OF CORRELATION FUNCTIONS

Improvements in methods and devices permitting automatic calculation of correlation functions

... 1,046,278. Correlation calculators; electric selective signalling systems. COMMISSARIAT A L'ENERGIE ATOMIQUE. July 23, 1963 [July 30, 1962]. No. 29195/63. Headings G4A and G4H. [Also in Division G1] In a method of calculating correlation functions, the values of the signals to be treated are quantized in bands, the width of which are proportional to the mean quadratic deviation of the signals treated. It is shown that this condition gives a constant quality factor for the calculation over a wide range of values of the mean quadratic deviation. In the auto-correlation circuit of Fig. 5, an input signal at terminal 11 passes direct to a quantization unit 16 and through a delay unit 15 to a quantization unit 17. A voltage proportional to the quadratic deviation of the signal is derived from the signal of a rectifier 30 and filter 31 and fed to a potentiometer chain of equal resistances 20a- 20f, to the taps on which the signal is compared in units 16 and 17. The quantized signals are multiplied ...

Vorrichtung zum kontinuierlichen Entfernen der Umhuellung von Kernreaktor-Brennstoffpatronen

Verfahren und Vorrichtung zum Messen des Betrages schwacher Magnetfelder, insbesondere des Erdfeldes, durch Kerninduktion

Einrichtung zur Intensitaetsmessung eines schwachen magnetischen Feldes

Beobachtungsfenster einer hochaktiven Zelle

Flache Mikrowellen-Schlitzantenne.

Vorrichtung zur magnetischen Entmagnetisierung

Verfahren und Vorrichtung zum Messen schwacher magnetischer Felder unter Ausnutzung der Kerninduktion

Flache Mikrowellen-Schlitzantenne.

Verfahren zum Erhalten ausreichender Durchsichtigkeit einer radioaktiver Strahlung ausgesetzten Glasplatte und durch Anwendung dieses Verfahrens durchsichtig bleibendes Beobachtungsfenster

Einrichtung zur Intensitaetsmessung eines schwachen magnetischen Feldes

Perfectionnements aux magnétomètres nucléaires du type mettant en oeuvre un pompage haute fréquence sur une transition électronique

Method and device for measuring magnetic fields even very low, and in particular the earth's magnetic field, especially in view of the survey

Filtre électrique mettant en oeuvre des transitions quantiques et dispositifs, en particulier oscillateurs et magnétomètres, comportant un tel filtre

Method and device for measuring magnetic fields even very low, and in particular the earth's magnetic field, especially in view of the survey

Perfectionnements aux dispositifs magnétiques de désaimantation

Improvements in methods of measuring weak magnetic fields by nuclear induction

Improvements in methods of measuring weak magnetic fields by nuclear induction

Continuous stripping machine

SLOTTED MICROWAVE ANTENNA WITH LOW THICKNESS STRUCTURE.

Automatic locking and unlocking device for controlling the movement of a mechanical component

OPTICAL METHOD AND DEVICE FOR DENOMBRETING, LOCATING AND CLASSIFYING THE SIZE OF CIRCULAR-SHAPED OBJECTS BASED ON INTERCORRELATION BY HOLOGRAPHY

PROCEDE ET DISPOSITIF OPTIQUES D'ETUDE D'UNE FAMILLE D'OBJETS CIRCULAIRES BASES SUR UNE INTERCORRELATION. SELON L'INVENTION, POUR COMPARER DES DISQUES A UN OBJET DE REFERENCE, ON REALISE L'INTERCORRELATION OPTIQUE PAR HOLOGRAPHIE DE FOURIER DE L'ENSEMBLE DES DISQUES AVEC UN ANNEAU DE REFERENCE CIRCULAIRE D'EPAISSEUR FAIBLE DEVANT LE RAYON. APPLICATION AUX CONTROLES DE PIECES, GRAINS, BULLES, GOUTTES, ETC. OPTICAL METHOD AND DEVICE FOR STUDYING A FAMILY OF CIRCULAR OBJECTS BASED ON AN INTERCORRELATION. ACCORDING TO THE INVENTION, TO COMPARE DISCS WITH AN OBJECT OF REFERENCE, OPTICAL INTERCORRELATION BY FOURIER HOLOGRAPHY OF ALL OF THE DISCS IS PERFORMED WITH A LOW THICKNESS CIRCULAR REFERENCE RING IN FRONT OF THE RADIUS. APPLICATION TO CONTROLS OF PARTS, GRAINS, BUBBLES, DROPS, ETC.

Device including a logical multiplication matrix for calculating correlation functions

Method and device for the optical processing of objects through intercorrelation with rings

Optical process and device for studying a series of objects based on an intercorrelation. To compare objects to a reference object, the optical intercorrelation is effected by holography of Fourier of the set of objects with a reference ring. Application to control of parts, grains, bubbles, droplets, etc...

HOLDING DEVICE OF GLASS

Machine tool for cutting an assembly of coaxial tubes, particularly channels of a pressure tube nuclear reactor

New knife sharpener

Methods of measuring weak magnetic fields by nuclear induction

Quantum filter including nuclear filter

Apparatus for mixing, emulsifying and homogenizing liquids

Apparatus for mixing, emulsifying and homogenizing liquids

Slot hyperfrequency antenna with a structure of small thickness

An antenna having a "suspended stripline" structure with two metal plates encircling a dielectric film is disclosed. In this structure, a channel is made for a feeder of a slot with the end of a central conductor of the line penetrating a cavity whose thickness is approximately equal to that of the channel. The slot is made in the upper wall of the cavity.

Process of operation of and window for a high-activity cell

Process of operation of and window for a high-activity cell

Dispositif de calcul automatique des fonctions de corrélation

Procédé d'extension du domaine d'utilisation de corrélateurs de signaux aléatoires et corrélateurs en faisant application

Apparat til Blanding af Vædsker og Fremstilling af Emulsioner.

Klappstuhl

Dispositif de fixation d'une peau de phoque sous un ski

Vorrichtung zum Transport von radioaktiven Stoffen

Dispositif magnétique de désaimantation

Perfectionnements apportés aux machines à nettoyer les montres

Filet à provisions de forme trapézoidale avec soufflets sur le fond et les cotés

Magnetic resonance device for measuring magnetic field intensity