Abstract: The connector has an insulating body of rectangular cross-section formed with at least one row of passages extending parallel to a plugging direction, each passage being formed with a backwardly directed shoulder. At least one side wall of each passage is cut out to form a detent whose resilience tends to hold it in a position in which it projects into the respective passage. Contact terminals are received in the passages and each sized to be retained by the respective detent against the respective shoulder. A unitary locking grid has an end wall which contacts a front end face of the body and is formed with holes in register with the passages, two side flanks that are spaced apart so as to straddle those two walls of the body which are orthogonal to the row, and two side flaps that are connected to the end wall by flexible portions, and that are designed to contact the outside walls of the body which are parallel to the row.

Abstract: An electric connector, in particular between a generator and an electronic controller for inflatable motor vehicle airbags, with a connector housing for housing contact tubes with leads. In the coupling position, the connector housing lifts a jumper, disposed in a receptacle for the generator-sided plug pins, from the plug pins. To simplify the assembly and mount the connector reliably on the generator, the connector housing (1) has an assembly opening (2) which can be closed by a cover member (11) which is slidable over the assembly opening (2) and can be retained on the connector housing (1) by a pin (16), arranged in front of the cover member in the push-on direction.

Abstract: A method for passivating the surfaces of a nuclear steam generator and a solution therefor includes EDTA and hydrogen peroxide in a temperature range of 37.degree. C. to 49.degree. C. The solution is adjusted to have a pH of between about 9.2 and 9.5 and used on the surfaces for two hours or more for passivating the surfaces.

Abstract: A plug connector in which the cables are led out at an angle and a secondary lock, comprising a plug part (1) on which there are disposed at least two opposite tongues (2a, 2b) disposed parallel to the plug axis (3) and having outwardly pointing catches (4a, 4b), and a socket part with correspondingly arranged slots to receive the tongues (2a, 2b) and for engagement of the catches (4a, 4b) on correspondingly disposed shoulders. The tongues (2a, 2b) in the plug part (1) extend toward the back wall (5). The surfaces (6a, 2b) of the tongues (2a, 2b) oriented toward the plug axis (3) are bevelled away from the plug axis (3) toward the back wall (5). The tongues (2a, 2b) are arranged to pivot on the plug housing over substantially half their length.

Abstract: The device (5) according to the invention comprises a cylindrical body (50). The outer base of the body (50) has a crown piece with correction catches (501) engaging in a second crown piece of correction catches (30) of a connector (3). The number of correction positions between the body (50) and the connector (3) is equal to the number of catches (501, 30). An elastic washer permits a partial drawings back of device (5) to permit changing the correction position. According to a first mode of embodiment, the cylindrical body is extended by a threaded shaft and screwed onto the connector (3). According to a second mode of embodiment, a key system (54, 542, 543) acts on a latch (6) sliding inside connector (3), which permits locking onto a support (4). This key system is activated by a tool of the screwdriver type. The device can be used for coupling of complementary electrical connectors, notably for aeronautic applications.

Abstract: A process for chemical cleaning of metal components having an iron oxide deposit upon a layer of compounds having a high silica content. The process includes the step of preparing an aqueous mixture including an agent for complexing Si(OH).sub.4 and at least one compound for dissolving the high silica content layer. The dissolving compound is selected from the group consisting of insertion compounds for inserting OH or F ions in the Si(OH).sub.4 and OH-containing organic compounds. The insertion compounds including electrophilic groups and are selected from the group consisting of conjugated unsaturated systems and unsaturated N-oxide compounds. The OH-containing organic compounds are selected from the group consisting of organic compounds having at least one alcohol function, aromatic amines, soluble salts of tertiary amines, and aromatic amines causing condensation of OH radicals onto silica.

Abstract: A connector for shielded cables comprises a housing and signal and ground contacts mounted in the housing, the housing having an upper wall with inlet openings for the cables. A strain relief member for each cable joins an inlet opening, each strain relief member being unitary with the upper wall of the housing and projecting from the upper wall, wherein the shape of each strain relief member is adapted to the outer jacket of the corresponding cable.

Abstract: Combined beam waveguide and metal cable plug connectorA combined beam waveguide and metal cable plug connector with an angled cable outlet, comprising a housing (1) in which beam waveguide plugs (4) and flat contact springs are disposed on the plug side in contact chambers (2, 3) provided for the purpose while an outlet aperture for the cables (5, 21) is provided at the rear. The opening for the cables comprises a channel (6), the base of which is bent at an angle of 90.degree. maximum to the plug axis and which is open towards the back of the plug connector. The metal cables (21) are taken out of the housing (1) in one or more layers on the channel base (6). A snap cap (7) closes the channel (6) at the rear and has lateral ducts (8) in which beam waveguide cables (5) are accommodated, the ducts (8) ensuring that the beam waveguide cables (5) are deflected with a radius which is not damaging to the beam waveguide cables.

Abstract: A device for trapping migrating bodies in nuclear power station steam generators or boilers is provided to prevent them from jamming between the generator tubes. The device, in the form of a grating or grid, is placed above a horizontal plate to which are fixed the upper ends of the pipes containing cyclone separators. It defines passages, whose largest dimensions are smaller than the minimum distance separating the tubes.

Abstract: Recirculation-type steam generator ensuring heat transfer between a fluid circulating in a primary circuit and a fluid circulating in a secondary circuit, constituted by a pressure envelope containing a vaporization enclosure having a roof and covering a bundle of tubes traversed by the primary fluid. The generator receives the secondary fluid which circulates in the vaporization enclosure. The steam produced by the secondary fluid is extracted during this circulation and is dried by cyclone separators constituted by cyclones fixed to first ends of tubular columns whose ends are fixed to the vaporization enclosure roof communicating with the vaporization enclosure. The cyclone separators are detachably fixed to the vaporization enclosure roof.

Abstract: The lower part (31) of the pole (10) carries an expansible bush (40) engaged and fixed on the outer surface of the part (31) by one of the ends (41) of the bush and comprising longitudinally extending slots defining resiliently bendable strips. A group of balls (39) mounted to be radially movable in openings (38) in the lower part (31) of the pole (10) and bearing against the bendable strips of the expansion bush are movable between a retracted position and a position for expanding the bush (40), by a cylindrical cam (36) connected to an actuating rod (20). The device permits inserting the locking sleeve (8) in the guide tube (13) without risk of deformation of the end strips of the guide tube (13).

Abstract: The surface of the component (1, 2) to be protected is scanned, a jet of semitransferred arc plasma (17) into which a metal powder is introduced. The process can be applied to the production of a layer of coating (18) on the outer surface of a region of welding connection (3) between a nozzle (1) and a primary pipe (2) of a pressurized water nuclear reactor or to the coating of the inner surface or the connecting surface of an adapter passing through the reactor vessel head.

Abstract: A connector for shielded cables comprises a housing of insulating material and signal and ground contacts accommodated in said housing and to which corresponding conductors of the cables are connectable, said contacts being arranged in rows and columns. The housing is assembled of one or more modules and at least one module cap, wherein each module can be detachably mounted in the module cap in a predetermined position with respect to the module cap, and wherein each module is provided with at least one column of contacts.

Abstract: The vessel of the nuclear reactor includes at least three assemblies (22) distributed around the periphery of the core support plate (25), each comprising a key (26) fixed to the inner surface of the wall (21) of the vessel at the core support plate (25) and a cut-out (29) in the external edge of the core support plate (25) and open towards the outside in order to receive, with a clearance, an end part (30) of the key (26). The cut-out (29) includes an upper surface (29d) perpendicular to the axis of the wall (21) of the vessel and of the lower internals (23), which is machined in the core support plate (25) in order to retain the internals (23) in the event of a drop. A keyhole slot (28) is fixed inside the cut-out (29). In order to carry out the adjustment of the dimensions of the keyhole slot (28), a standard keyhole slot may be used, equipped with distance measurement sensors in order to obtain the desired clearances between the key (26) and the keyhole slot (28).

Abstract: A connector assembly for printed circuit boards comprises a first and a second connector part. The first connector part has a first housing of insulating material and having a bottom and two opposite side walls and with male contact elements mounted in the bottom of the housing and arranged in rows and columns and having portions projecting from the bottom of the housing adapted to be inserted into holes of the corresponding printed circuit board. The second connector part has a second housing of insulating material adapted to be inserted into the first housing with an insertion side and with female contact elements mounted in the housing and arranged in a corresponding manner in rows and columns and having portions projecting from a lower side of the housing, which projecting portions can be inserted into holes of the corresponding printed circuit board.

Abstract: During shutdown of the nuclear reactor, the closure head of the vessel having been dismounted and the vessel (3) and the pool of the reactor both being filled with water, an inner zone of the penetration tube (6) for penetrating the bottom head of the vessel (3) is isolated between two seals (39,42), from the upper level of the pool. An electrolyte is caused to flow in the isolated zone inside the penetration tube (6) and a current is passed through the electrolyte in order to deposit a metallic electroplating layer onto the inner surface of the penetration tube (6) in the isolated zone. The metallic layer is preferably a layer of nickel of a thickness of approximately 0.1 mm.

Abstract: The device includes an inspection rod cluster (10) comprising a central cylindrical body (45) and a plurality of arms (46, 48) extending radially with respect to the cylindrical body (45). Guide bars (49) for the inspection rod cluster (10) in the guide elements of the guide tube may be fixed to the end of at least two arms (48), opposite the cylindrical body (45), and rotary inspection probes (47) may be fixed to the end of the other arms (46). Preferably, the probes (47) are probes for remote optical measurements by the ladar method.

Abstract: An electric connector comprising an insulating body of plastic material having a number of axial cavities housing respective electric terminals, and a recess formed in the rear end of the body, communicating with the cavities, and housing a seal having openings enabling insertion of the terminals inside the cavities and annular sealing lips cooperating sealingly with the cables of the terminals. The annular lips project axially towards the respective cavities from a surface of the seal cooperating with projections extending from the intersections of the walls defining the cavities, for preventing contact between the lips and the walls during insertion of the terminals.

Abstract: In the case of an electric socket contact for insertion into a socket housing with a sleeve body and a laminated cage, which is attached axially to said sleeve body, for the displaceably pressing reception of a contact pin and attachment means, which are designed at the sleeve body, e.g.

Abstract: In a method of milling at least one localized region of a workpiece the workpiece is rotated about a horizontal axis of a cylindrical region having a radius R.sub.p. An external contour of radius R.sub.F of a tool is brought into contact with the cylindrical region of the workpiece at a machining point. The tool rotates about a rotation axis intersecting a first transverse axis of the workpiece perpendicular to and intersecting the longitudinal axis. The rotation axis is in a plane parallel to the longitudinal axis and to a second transverse axis of the workpiece perpendicular to and intersecting the first transverse axis and to the longitudinal axis. The rotation axis is at an angle .alpha. to the second transverse axis such that the tangential speed of said tool parallel to said second transverse axis is equal to the tangential speed of said workpiece.