Abstract: An insulator which includes at least one plate-shaped dielectric component 3 having a cylindrical head 4, at least one connecting member 14 having at least one pin end 5 embedded inside a recess defined within the head of a dielectric component and at least one other connecting member having a cap 12 which covers the head of the dielectric and is sealed thereon, the one connecting member having a flange (15, 27, 28, 29) spaced from the embedded pin end and whose outer diameter is larger than the outer diameter of the head in which said end is embedded and the cap of the other connecting member having a flared base (16, 30, 31, 32) which covers an annular portion of the dielectric which extends beyond the outer diameter of the head, so as to define a rigid extension on either side of the dielectric component.The invention applies in particular to multiple-dielectric insulators in which the dielectric components are made of tempered glass.

Abstract: A ceramic unit for indirect heat exchange, said unit being formed by extruding raw ceramic material in a parallel duct configuration, piercing a first series of inlet and outlet orifices for a fluid at the ends of a first series of ducts, the axes of said orifices being perpendicular to those of the ducts, and firing the unit. The inlet orifices (5) and/or the outlet orifices (9) are formed by making oblique cuts (7,10) on the ends of the rows of ducts to provide inlet or outlet openings perpendicular to the common direction of the ducts and then closing off the ends of the obliquely cut rows. Application to heat exchangers for turbine engines.

Abstract: The invention relates to line insulators made of organic material. Such an insulator comprises a bar (7) of high tensile strength, a protective sheath (8) made of an elastomer material, a plurality of fins (4) and an anchor fitting (2) at each end. In accordance with the invention, at least one inner part of the insulator is semiconductive along the whole length which separates the anchor fittings (2); this part may be constituted either by the sheath (8) itself or by the bar (7) and the bedding material in said fittings. Application, in particular, to line insulators intended for use in highly polluted zones.

Abstract: The invention relates to fixing a bare cable on an electric insulator by means of a device which includes a fixed part integral with the insulator and which has a groove (5) which forms a cradle in which the cable is laid, as well as a moving part (8) which holds the cable in its cradle in the locked position. According to the invention the fixed part and the moving part have contact surfaces with the cable to be fixed such that said cable in the locked position is subjected to progressive deformation of its cross-section in a first direction substantially perpendicular to the direction which corresponds to the clamping of the moving part at the central portion of the cradle and in a second direction substantially perpendicular to the first direction at the two ends of the cradle. Application in particular to support insulators and to suspension insulators.

Abstract: A titanium or titanium alloy pin for cement-free fixing in a long bone for a joint prosthesis or for bone repair, said pin being surrounded by a lattice of titanium wire with a mesh size of at least 0.3 mm. The pin has a rectangular cross-section and two of its surfaces have respective longitudinal grooves (3) which are notched transversely to form shoulders (5) perpendicular to the pin axis, said shoulders giving the pin a scaly profile. Application to a total prosthesis of the hip.

Abstract: Electrical insulator comprising an ouer tube of dielectric material filled with blocks of dielectric foam and sealed at its ends.The filling is manufactured independently of the tube in a material of substantially compatible coefficient of thermal expansion. The filling is connected to the inner surface of the tube by an adhesive interface material which provides good mechanical and electrical connection between the tube and its filling.Application to electrical insulators which are of large diameter and/or great length.

Abstract: Method for manufacturing a bone prosthesis made of porous alumina. Calibrated alumina grains are subjected to firing at a temperature lower than their sintering temperature; they are disintegrated, then compressed into a pressed mass, then the latter is subjected to sintering.

Abstract: Method of manufacturing silicon nitrides with a general formula of Si.sub.6-z Al.sub.z O.sub.z N.sub.8-z, in which z is a number less than or equal to 2.8. Silicon nitride is made to react at a temperature higher than 1600.degree. C. and in the finely divided state on aluminium oxynitride, and in the presence of an agent which generates gaseous silicon monoxide. Application to the manufacture of hard materials of high resistance to oxidation and to creep at high temperature.

Abstract: Method of producing a rod anchoring structure particularly for use in high tension insulators. It comprises an assembly of a rod in an anchoring fixing. The end of the rod is fitted with a surrounding double ended wedge element having a neck and flaring in both directions along the rod away from the neck. This wedge element is then jammed in the anchoring fixing, either by deforming a sleeve tightly around the wedge element or by winding a filament tightly around it.

Abstract: Method for fixing a connecting cap (4) on a non-metallic part (1) by molding of the metal or alloy of the connecting cap in the melted state on the outer surface of the non-metallic part. One or several metallic parts closely applied more particularly a sleeve (2) or a ring, is arranged at least on a part of that outer surface.

Abstract: The invention relates to the manufacturing of suspension insulators of the type comprising essentially a body made of a dielectric material, a metallic cap and rod sealed to said body. The method according to the invention is characterized in that during sealing of the rod in the inner cavity of the body and of the cap on the body head, said body rests on a supporting table and undergoes by vibropercussion a vertical vibrating motion superimposed on a tilting motion with a rotating axis of tilt, said supporting table remaining isolated from the vibrations during the whole sealing operation. Application in particular to the manufacturing of heavy insulators for electric power lines.

Abstract: Structure intended to transmit great mechanical stresses, comprising an elongated core comprising at least an agglomerated glass fibre rod and fixing armatures fitted to the ends of the core, comprising means exerting radial compression stresses or stresses tending to jam the rod and maintaining at least partly those efforts in a zone of the structure situated in the armatures, even when the structure is not subjected to mechanical stresses. The structure has application to insulators for electric apparatus, stays, suspension of electric power conveying lines.FIELD OF THE INVENTIONThe present invention concerns a structure intended for transmitting great mechanical stresses, comprising an elongated core comprising at least one rod of agglomerated glasse fibres and fixing armatures fitted to the ends of the core, by means of which the mechanical efforts are transmitted. It relates more particularly to an improvement in the connection between core and armature of such structures.

Abstract: Heat treatment tunnel kiln for products having a circular cross-section, comprising a main heat treatment zone for circulating tubes or bars perpendicular to their axis, ensuring the rolling of the tubes or bars inside the supports, and zones for circulating the supports parallel to their axis, connected to flow circuits for gases different from those in the main zone.

Abstract: Prosthesis device intended for replacing a bone joint, more particularly that of the hip, and comprising two parts which replace its active portions, the portion of each of the two parts on which the contact surface between these latter is formed being made of sintered alumina. One of the two parts has a spherical internal face forming a contact surface and an external face which is to be fixed into one of the bones of the joint, contained in a sphere and provided with grooves a part of which is arranged between cones whose apexes are on the axis and/or between cylinders having the same axis of symmetry as the external face. The surface provided for the bone cells to grow again is greater than that which would be provided by a part having grooves between planes perpendicular to the axis.

Abstract: Method for fixing a connecting cap (4) on a non-metallic part (1) by moulding of the metal or alloy of the connecting cap in the melted state on the adherence bearing surface of the non-metallic part. One or several metallic parts closely applied, more particularly a sleeve (2) or a ring, is arranged at least on a part of that adherence bearing surface.

Abstract: Method of cementing together the cap, body and stem portions of electrical insulators, comprising introducing measured quantities of water and cement into the cavities of the cap and body, mixing the ingredients within the cavities and immediately assembling the aforesaid portions into a complete article. The method is particularly useful in production line procedures of producing insulators.