Abstract: This hooking device is fastened to the choke plug (8) for guide tube (2). comprises of catches (54) regularly arrayed along the periphery of the flange (9) of the choke plug (8) and hooks to the upper spacer (4S) of the guide tube (2). It is kept in the engaged position by a spring system (56-58), 63-65) and can disengage by means of a tool means comprising a roller (77) acting on each catch (54) and a rim (68) resting on a muff (56) acting as a rest also for the spring (57).

Abstract: In a microbiological process for the elimination of nitrates from an aqueous liquid, the liquid to be denitrified passes through a first reaction zone containing a denitrifying biomass which utilizes hydrogen and into which hydrogen gas is injected. Effluent from the first reaction zone is introduced into a second reaction zone containing a nitrifying biomass which is also contacted by an oxygen-containing gas.

Abstract: A load selector has an insulating cylinder, provided with fixed selector tacts inverting contacts and common point rings, in the interior of which is displaced a drive crankshaft on which are supported commutator modules. The drive crankshaft includes a male coupling element, a female coupling element associated with an upper crank, an off-center tube and a lower crank. A rolling mechanism serves as a lower bearing, and a rolling mechanism serves as the upper bearing. A drain tube is coupled to a central siphon tube which leads to an outlet formed in the lower crank.

Abstract: Each swiveling yoke (3) of a movable element 1 includes a stem 16 concent with a shaft 6 around which moves the swiveling yoke 3 and connecting the two arms 17 between which a roller 4 is free to rotate about a shaft 11; the outer surface of the stem 16 acts as a friction surface for a friction piece 18 comprising an elastic blade 19, a bead 20 made of a good electrically conducting material and a cable 27 connected by a cable terminal 26. The elastic blade 19 rests on two cross-pins 22 and 24 inserted into insulating plates 23.

Abstract: The shroud is designed to prevent components of a damaged nuclear fuel element from dropping into a pool. The shroud consists of a body 1 surrounding the nuclear element over the major part of its height, and a base 2 equipped with a device to attach it to the feed 13 of the fuel element. The attaching device is actuated by the rotation of a control shaft 17 capable of being inserted in the center of a hub 9 equipped with two arms 10, which carry at their ends gripper fingers 11, maintained in their position of engagement in the feet 13 by springs 20.

Abstract: In a simulator for training airplane pilots comprising a base positioned on he ground (24), a platform supporting an airplane equipment station of which the interior reproduces the interior of a real cockpit (17) and an assembly of jacks (15) and scissors (16) disposed between the base (24) and the platform and actuated by means of a hydraulic control system, the platform is replaced by a cross-braced self-supporting structure in the form of a basket (18), the base of which coincides with the base of the simulated cockpit (17) and the upper edge of which is located approximately at the height of the lower edges of the windows of the simulated cockpit (17), the jacks (15) and the scissors (16) connecting the base to the structure (18) being fixed in at least three places in proximity to the upper edge of the said structure (18) and being directed toward the base (24), mounted on the ground, in spaced apart relationship from said structure.

Abstract: In these machines, the rim (16) of the rotor (13), supported overhangingly by oblique arms (15), is equipped with a double set of polar pieces (17 and 18), one fastened to the outer part of the rim (16) and called the peripheral polar pieces (17) and the other attached to the inner part of the rim (16) and called the internal polar pieces (18).The peripheral polar pieces (17) define with a first stator (20) fastened to the external ferrule (10) of the machine, a first gap (19).The internal polar pieces (18) define with a second stator (22) attached to an inner ferrule, a second gap (21).The inner and peripheral polar pieces (17 and 18) are arranged back-to-back, in pairs of inverse polarity, to obtain a radial flux in the rim (16) and the polar pieces (17 and 18).

Abstract: The mechanical unit, equipped with an electric motor rotating at a high velocity, turns a wheel hub at a low velocity by means of a speed reducer and includes an external brake disk rotating at an intermediate velocity. The brake disk cooperates with conventional elements to constitute a unified external braking means which operates effectively and is easily accessible.

Abstract: Apparatus for securing a metal hoop onto a metal rim is disclosed which apparatus includes two tightening collars integral with the rim, the collars and the metal hoop having conical shoulders and conical bores, each with the same angle of inclination, the conical shoulders being deformable by the action of the conical bores upon tightening the collars against the hoop so that no play remains between the hoop and the rim.

Abstract: A process control installation has means for sensing a plurality of physical conditions connected to means for comparing the condition to a reference. A differential signal is fed to a corresponding reproduction circuit which in turn feeds it to inputs of a plurality of majority decision circuits. The majority decision circuits are in turn connected to pairs of logic circuit trains which in turn are connected to other logic circuitry for intrinsic security.

Abstract: The present invention concerns an induction furnace. It is the object of the invention to increase the power of such furnaces while maintaining their weight or space requirements, or, to reduce their weight or space requirements for a given power, or further to design machines more powerful than those known at the present time. There exist at this time crucible induction furnaces designed for a capacity of approximately 30 t of cast iron. The invention permits the adaptation of such a furnace to melt not case iron, but steel and to increase the capacity of said furnace to a higher order of magnitude, for example 100 t or more. To enable the furnace to satisfy the requirements of steel making, the invention also provides for an increase in specific power, presently limited to approximately 300 kW/t.

Abstract: Braking device for railroad bogie running at high speed, comprising a fixed part integrally connected to the frame of the bogie and a movable part suspended from the fixed part and adapted to be vertically displaced by suitable means towards a rail. The movable part is provided at its lower face with a series of electromagnets arranged above the rail. The series of electromagnets is flanked at each of its sides with a braking shoe adapted to be applied on the rail at the moment of braking in such a way that the electromagnets be placed at a relatively small distance from the rail. Means are provided for controlling the position of the braking shows as a function of the wearing of the shoe.