Method of attaching fittings to rods or tubes of resin-bonded fibre and fittings attached to such rods or tubes

摘要

816,926. Rod couplings. BRITISH INSULATED CALLENDERS CABLES Ltd. May 6, 1957 [May 7, 1956], No. 14106/56. Class 99(1) A metal fitting is attached to a rod or tube of resin-bonded fibres by placing a sleeve of malleable metal such as aluminium or copper forming the fitting or a part thereof, on the rod &c. and compressing the sleeve to deform it permanently to cause it to grip the rod &c. The rod &c. 2 may be made of preferably a hard setting resin such as epoxide resins and polyester resins but phenolic, silicone and melamine resins may be used and the rods are preferably reinforced with longitudinally parallel glass fibres or fibres of rayon, nylon or the material known by the Registered Trade Mark Terylene. The sleeve 1 is initially of circular cross-section having tapered ends 5 and is compressed to an external hexagonal shape, Figs. 3, 4 (not shown). Before compression, Fig. 1, the sleeve makes a sliding fit with the rods 2, a gap 3 being left between them. Compression is applied to the whole of the sleeve except the tapered end portions 5 after which, Fig. 2, the rod is also deformed as shown. In a modification Figs. 5-10 (not shown), a fitting comprising a cylindrical lug with a central aperture or a clevis end is attached to a resin-bonded glass fibre rod. A fitting having a sleeve with an apertured external lug 16, Figs. 11, 12, is attached to a rod 2 which projects from each side, the sleeve comprising two parts 14, 15 which engage in a relative axial sliding fit to enclose a portion of the resin-bonded glass fibre rod 2, the fitting being attached by compressing the sleeve on the rod as before also bringing the parts 14, 15 into contact with the rod. In Figs. 13, 14 (not shown) a clevis and apertured lug are attached to the ends of a rod to provide an anchoring member for overhead railway lines or a stay rod for transmission poles etc. In Fig. 15 (not shown) a combination of the fitting in Fig. 11 and the fitting in Fig. 13 is used for supporting an overhead trolleybus contact wire and in Fig. 16 (not shown), the various fittings are used in a suspension system for overhead electrification. The invention is stated to be particularly suitable for overhead traction systems where the resinbonded fibre rods and the fittings are under tension.