Abstract: An insulator core including a rod (20) fitted with a sheath (12) and with insulating fins (2,3) is fixed in a metal cap (10,10') by embedding the end (1) of the rod (20) in an organic embedding substance (9) in a thimble (5,5'), which has undercut zones and a flange (7) which is bonded or crimped to the sheath in a sealed manner, and embedding the thimble (5,5') in the cap (10,10') using a cheap inorganic cement (11). The thimble is coated with an anti-adhesive layer (27) which does not adhere to the embedding cement.

Abstract: An insulating spacer subjected to bending stresses is formed from a glass fiber reinforced rod having a transverse hollow in the vicinity of at least one end. The rod is covered with a sealing elastomeric sheath. A lightweight cable clamping structure includes two half sleeves clamped around the one end by U-bolts. At least one of the U-bolts also presses a cable clamp toward one of the half sleeves. The one half-sleeve has an internal boss, shaped to fit the transverse hollow so as to fix the half-sleeves on the rod, and a transverse external groove facing the cable clamp to fix a cable against the sleeve.

Abstract: An electric insulator which includes a rod (2) made of glass fibres and resin, one end of said rod being received in a fitting (1) made fast to a post (20). To improve the mechanical strength of the rod (2) in the anchoring means, a fitting (1) with a double cone recess is provided and the end of the rod has one or two grooves machined therein and is embedded in the recess in an organic substance (16). The grooves are formed only through the lower portion of the rod where the fibres are subjected to compression forces.

Abstract: An insulator core made of an organic substance and including a central rod (1) fitted with an insulating covering (4) is fixed in a metal cap (8) which is not machined.The end of the rod has undercut zones such as circumferential channels (10) or double cones (9), and a ductile metal cup (5) whose edges are made integral with the insulating covering (4) in a sealed manner is crimped on the rod. The cup (5) is itself embedded in the cap (8) by means of an organic cement or embedding substance (7) which is reinforced.

Abstract: The invention relates to an electric insulator of the line post type which has a rod (2) made of glass fibres agglomerated in resin and covered with a protective elastomer sheath. A socket (15) with an opening (16) is provided to make it fast with post (14). The socket end of the rod is machined to provide a hollow (8) designed to improve the mechanical characteristics of the rod in the fitting (1) of the post (14). A locking piece (17), which is complementary to the hollow (8) in the rod (2), clamps the assembly together by means of two fixing parts (18).

Abstract: The binding is disposed substantially symmetrically about a plane of symmetry which passes through the insulator and which is orthogonal to said conductor (10). It comprises a first ring (8) for occupying a portion of the circumferential groove, a second ring (9) for occupying the top groove, two conductor-retaining branches (5), and tightening means (2, 11) for tightening the binding. Each of said branches comprises a first end portion (7) in the form of a preformed spiral retainer for wrapping around said conductor, an intermediate portion for threading through said second ring when lodged in the top groove and through said first ring when lodged in the circumferential groove, and then extending in an arc of the same diameter as the circumferential groove to a second end portion which provides an eye (6) for engaging the tightening means.

Abstract: The binding is disposed substantially symmetrically about a plane of symmetry which passes through the insulator (1) and which is orthogonal to said conductor (5). It comprises a ring (10), two conductor-retaining branches (11, 6), and tightening means (21, 22) for tightening the binding. Each of said branches comprises a first end portion (8, 9) in the form of a preformed spiral retainer for wrapping around said conductor, an intermediate portion (6) in the form of an arc of a circle having a radius of curvature that is substantially equal to the radius of the bottom of said circumferential groove, and a second end portion providing an eye for engaging the tightening means. Both branches pass through the ring at the transition between their spiral end portions and their intermediate arcuate portions. At least one elastomer block (20) is inserted between said eyes to be held in position by said tightening means drawing said eyes towards each other.

Abstract: A tool having two side rods spaced apart by a connecting crossbar facilitates clamping and unclamping a cable in a groove on an insulator cap. To clamp the cable, the crossbar is inserted into a first recess on the cap between the groove and a protruding stud, and the side rods are pressed against a front branch of a clamp wire pivotally mounted on the cap to snap the front branch into a second recess below a front guide surface on the stud. To unclamp the cable, hooked extensions of the side bars engage the front branch of the clamp wire and lift it out of the second recess when the crossbar is pressed against the front guide surface of the stud. Separate clamping and unclamping tools can be mounted on an insulating handle for pivoting between a rest position and an operating position and spring biassing means can be provided to urge each tool toward a rest position.

Abstract: A bending resistant structure includes a rod (1) which is sealed in a casing (6), said casing receiving a double frusto-conical shaped wedging member (2,3,4) which applies jamming stresses to the rod. The wedging member is formed by a resin mass (2) moulded on the end of the rod (1), a resilient cap (3) covering the resin mass (2), and a thin metal sheathing (4) shrink-fitted over the cap (3), said wedging member being sealed in an associated casing (6), the structure being particularly resistant to high bending moments. Application to electric insulators and more particularly to those of the line-post type.

Abstract: The invention relates to fixing a metal strength member on a non-metal part. A heat-resistant fibre glass layer is inserted between the strength member and the non-metal part, the layer extending throughout at least the zone of the non-metal part which corresponds to the point where the molten metal which forms the strength member is injected and being coated with a non-adhering inert inorganic substance so that the layer is thus compressed between the non-metal and the metal part when the metal part is applied against the non-metal part. Application in particular to manufacturing tempered glass electric insulators with moulded aluminium caps.

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: 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: 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: 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.