Abstract: The present invention relates to a coupling, employing a thermal sleeve, for connecting a secondary conduit to a main conduit.The coupling according to the invention connects a main conduit with a secondary conduit which opens through a lateral opening into the said main conduit and includes a tubular sleeve which is located according to the axis of the secondary conduit, in which the entry mouth of the sleeve is connected in a sealed manner to the said secondary conduit, and its end engages in the said lateral opening thus constituting an orifice, and is so designed that the said sleeve is shaped so that it converges according to the axis of the secondary conduit, in the sense directed from the outside towards the axis of the main conduit.This coupling may be used in the piping system for a nuclear reactor.

Abstract: The invention relates to a filter for purifying a fluid containing ferromagnetic particles.The filter comprises a cylindrical envelope containing steel beads between which the fluid to be purified passes, and a device, at the periphery of the envelope, for magnetizing the beads. It also comprises at least one plate for supporting the beads, which is pierced with holes and arranged transversely at a certain height in the envelope. The fluid is introduced and discharged by means of pipes, one of which opens in the envelope below the plate for supporting the beads, and the other of which passes through the bed of beads, from the bottom, and opens above the bed of beads and below the top of the envelope of the filter.The invention applies in particular to the filtration of the pressurized water of a nuclear reactor using pressurized water.

Abstract: Push-button movable in a casing for switching an electric circuit and comprising magnetic return means and contact elements carried by the casing, said contact elements being electric or electronic components adapted to pass individually from a first conducting state to a second conducting state when the push-button is moved from a first position to a second position within the casing.

Abstract: In a dye laser comprising a cavity, one end of which is closed by an angular dispersion system, and which is provided with a separator for extracting the laser beam from the cavity, the separator is arranged so that the dispersive system and the system for application of the laser beam are on the same side relative to the separating face of the separator. An aperture isolates the reference wavelength from the extracted beam.Such a laser can have very good monochromaticity and is useful wherever there is a need for high spectral purity, in particular in Raman spectrometry.

Abstract: A shock absorber has expansion and compression damping characteristics readily adjustable, if required, to different extents. In one preferred form, it includes an adjustable orifice associated with a piston, and the orifice includes an annular flexible valve element and a valve-seat member engageable with the inner peripheral edge thereof. The valve-seat member is formed at the bottom with feet which are arranged opposite to a stepped or continuously inclined annular top surface portion of the piston and is axially movable for engagement with the latter. The amount of axial movement of the valve-seat member and hence that of deflection of the valve element is adjustable by rotation of the valve-seat member relative to the piston through provision therefor at the top of the cylinder.

Abstract: A rotary valve for changing the connections of the fluid inlet passages and the fluid outlet passages of a Gerotor type fluid rotary machine in which the fluid is contracted and expanded by a plurality of cavities defined by the teeth formed on a stator and a rotor in response to the orbital rotation of the rotor formed with one less external tooth than the number of the internal teeth on the stator. The rotary valve selectively connects the fluid passages with the Gerotor cavities by means of its rotary commutator which orbits with a phase difference of 90.degree. with respect to the Gerotor rotor, and the commutator is rotatably accommodated in a spacer disposed between an end cover and a port member having a plurality of fluid passages. The clearance at each side of the commutator is permanently determined by the width of the spacer.

Abstract: The present application discloses a composite cooking device of the type having a box-shaped main body provided therein with a heating chamber, a heat source such as a gas burner, a magnetron, and a cooling fan for sending air into a cooling duct, having the magnetron interposed therein, and formed between the cooking device main body and the heating chamber, a one-sided space chamber with a front operation panel and an upper area which extends from the space chamber and is in communication with the atmosphere through an exhaust opening made in the upper portion of the main body. The device includes a control means for application of a high voltage applied through a transformer, or the like, the same contained in the space chamber. The invention is characterized in that the interior of the space chamber is separated by at least one partition wall into a front chamber for containing the control means and a rear chamber for containing the high voltage element.

Abstract: A cylindrical gear wheel having helical teeth with different pitch diameters for the left hand and right hand sides of the teeth and convergent line of teeth in which one side of the teeth are characterized by positive values of addendum modification while the other side of the teeth has negative values of addendum modification. By positive addendum modification is meant an addition to the nominal pitch diameter to obtain the pitch diameter at one side of a tooth and by negative addendum modification is meant a substration from the nominal pitch diameter to obtain the pitch diameter of the other side of the tooth. In the range of normal values of tooth pitch (mn) from 2 to 6 mm or normal tooth module the angular difference of inclination between the left hand and right hand sides of the teeth is within the range of 30' to 3.degree. for pitch diameters up to 500 mn and the addendum modification values are in the range from 0.01 to 4 mn.

Abstract: Electrolysis unit such as a unit, for producing hydrogen and oxygen industrially by the electrolysis of water under pressure, includes a flow regulating apparatus (49) in each of the circuits (24, 23) connecting the anolyte and catholyte outlets (20, 21) of the electrolyzer (19) to the degassers (25, 34), and a flow-control apparatus (49) ensuring concomitant variations in the anolyte flow and catholyte flow.

Abstract: A television signal discrimination system is used in a television receiver provided with an electronic tuner for producing as output an intermediate-frequency signal whose synchronizing frequency is varied in response to an applied voltage and with a circuit for detecting the output signal of the electronic tuner.

Abstract: A system for controlling the rotation of a rotating structure comprises a detector for detecting the rotation of the rotating structure a circuit for repeatedly forming address signals for every revolution of the rotating structure in response to a detection output from the rotation detector, a memory circuit in which control data responsive to deviations in the rotational peripheral speed of the rotating structure in each revolution thereof have been stored beforehand at addresses corresponding to the address signals, the address signals being supplied to the memory circuit, whereupon the data stored at the corresponding addresses are read out, and a control circuit for obtaining a control signal from the detection output of the rotation detector and the data thus read out from the memory circuit and accordingly controlling the rotation of the rotating structure.

Abstract: The invention concerns a process for the final assembly of a nuclear reactor vessel comprising two sub-assemblies which are brought together and welded along mating surfaces. At least three female centering stubs, each associated with a seat recessed relative to the outer surface of the stub, are provided on the mating surface of one of the sub-assemblies, and at least three male centering stubs, corresponding to the seats of the female stubs, are provided on the mating surface of the other sub-assembly, the positions of the stubs being registered relative to elements for positioning internal fitments of the vessel. The two sub-assemblies are brought together to engage the male stubs in the female stub seats and to bring projecting annular ridges on the mating surfaces into contact. A key is inserted into a socket defined by one of the pairs of stubs and the stubs are then joined to each other by point-welds.

Abstract: A process for balancing a crankshaft having pin portions and associated balancing weight parts which counterbalance the pin parts comprising welding masses to the balancing weight parts to compensate for unbalance of the crankshaft. The welding takes place after the crankshaft has been heat treated. The weld masses are directly formed on opposite sides of peripheral surfaces of the balancing weight parts without any preliminary formation of grooves in the peripheral surfaces for the weld masses.

Abstract: A signal generating circuit in a color television system comprises a circuit for producing a signal of a frequency of 282 nfh (where n is an integer, and fh is a PAL-system horizontal scanning frequency) or a signal of a frequency closely approximating 282 nfh, a frequency-divider for frequency-dividing to 1/161 the signal of the frequency 282 nfh or a frequency closely approximating 282 nfh, and a circuit for forming, while satisfying the relationship (282.times.162) nfh.apprxeq.161 nfsc (where fsc is the PAL-system chrominance sub-carrier wave frequency), a signal of a frequency closely approximating the frequency fsc or of the frequency fsc and signals of frequencies fh and fv (where fv is the PAL-system vertical scanning frequency) or of frequencies respectively closely approximating the frequencies fh and fv.

Abstract: An axial-flow reversible turbine comprises a nozzle assembly and a wheel rotor mounted consecutively in the direction of the flow of the working medium and provided with two-section blades. One section of said blades forms the flow duct of the direct-rotating turbine and the other section, the flow duct of the counter-rotating turbine. The flow duct of the direct-rotating turbine incorporates a valve in the form of variable-incidence airfoil vanes intended to deny the access of the working medium into said duct. The inside diameter of the flow duct of the counter-rotating turbine is larger than the outside diameter of the flow duct of the direct-rotating turbine. The gas flow ducts of the direct- and counter-rotating turbines communicate with each other through a cylindrical bushing with ports.

Abstract: A mass exchanger with a cellular packing in form of checkerworks forming cells bent in the lower part forming the gaps. The bends of the cells are of radial or skew type. The checkerworks are formed by single or duplex walls. Alternate checkerworks are turned in relation to each other at about an angle of from 0.degree. to 90.degree., an advantageous angle is 45.degree..

Abstract: According to this invention, a spinning rotor is increased in speed until it reaches a predetermined higher speed beyond a lower speed region and then decreased in speed until it falls within the lower speed region, in which a yarn ending is effected. Thereafter, the speed of the spinning rotor is increased to a normal spinning speed beyond the predetermined higher speed. During rotation of the spinning rotor at the predetermined higher speed, sufficient subatmospheric pressure is produced in the spinning rotor to stretch out the yarn end thereby to prevent the yarn end from being snarled. Also, during this higher speed rotation of the spinning rotor, sufficient fibers in the spinning rotor can be collected in a maximum diameter portion in the spinning rotor to be connected with the snarl-free yarn end in a favorable condition.

Abstract: An apparatus for detecting the in-focusing conditions is disclosed. The apparatus comprises a light guide member having light incident end arranged along a plane which is placed at an angle of inclination against a predetermined focal plane of an optical system; a light receiver arranged near a light outlet end of the light guide member and consisting of a plurality of charge transfer elements arranged to receive light from the outlet end as a picture element array; means for deriving illuminance signals from the picture element array of the light receiver; and means for treating the illuminance signals to detect the in-focused position of the optical system.

Abstract: A combined tooth brush and gum massaging device comprising a bristle head which includes an intermediate bristle portion and at both sides adjoining massaging portions, whereby the width of the bristle head is enlarged up to a value that the bristle portion can overlap teeth of the upper tooth row and teeth of the lower tooth row simultaneously when both tooth rows are in contact with one another. Therefore both tooth rows and adjoining gums can be treated simultaneously.