GB755491A - Aerial electric line support - Google Patents

Abstract

755,491. Reinforced concrete posts. COMPAGNIE FRANCAISE DE L'AFRIQUE OCCIDENTALE. Nov. 1, 1954 [May 31, 1954; Aug. 5, 1954], No. 31461/54. Classes 20(1) and 20(4). An aerial electric line support comprises at least one pole resting on a swivel joint on the ground and held transversely of the line on one side by at least one stay and on the opposite side by the pulls resulting from the weight and tension of the line conductors at least one line conductor being supported by a member which is hinged to the upper part of said pole. The pole 1 rests on a swivel joint on a base plate 2 and is held by stays 3 secured at one end to collars 5 encircling the pole and anchored at their other ends 4 to the ground. A carrier 7, e.g. a metal rod articulated to one collar 5 carries three pairs of insulators 12 to which are secured respectively three phase conductors 9, 10, 11. A carrier 6 articulated to the second collar 5 carries a conductor 8 which may be earthed at each support. Each line conductor forms a series of obtuse angles in plan with their vertices at the supports. In a modification, only one or one pair of stays may be provided arranged in the plane bisecting the angle formed by the conductors. In this arrangement, the pole may be oblique with its foot under the conductors and the stay vertical. The conductors 9, 10, 11, may be suspended by rods 16 from rods 13, 14, 15 slung between two poles 1 held by stays 3, Fig. 5. The neutral conductor is supported by a stirrup 20. Additional lines may be added at the side by putting up a further pole with conductor rods and stay and removing the stay from the original pole. In a similar arrangement, Fig. 6 (not shown), the poles may be inclined and the stays vertical. At intervals a pair of stays converging at the top of a pole may be provided e.g. as shown in Fig. 7, where two poles 1 are each supported by two pairs of stays 3. Conductors 9, 10, 11 are supported by insulators 22 carried by triangles formed by rods 21 suspended from poles 1. A cable 23 connecting the tops of poles 1 supports the neutral line 8. In a modification, Fig. 8 (not shown), the poles 1 are inclined and the pairs of stays are vertical. The poles may consist, Fig. 9, of tubular concrete pieces 24 and triangular plates 25 with holes near their corners held together by six reinforcements formed by three rods bent to form loops at the lower end of the pole. The reinforcements are tensioned at the upper end of the pole and are held by an anchorage piece 29 protected by a detachable cap 34. A concrete collar 35 is provided to support the articulated supports for the conductors. The loops at the lower end of the pole are embedded in concrete 32 covered by a cup 31 which forms the head of the swivel joint. The rods of the suspension systems may be connected by rings on which the ends of the rods are hooked. Otherwise plates may be provided to which the forked ends of the rods are secured. In these two arrangements the conductor 8 may be supported respectively on one or two stirrups. Specification 224,506 [Class 20(i)] is referred to.