GB354609A - Improvements in overhead contact line systems for electrically-operated vehicles - Google Patents

Abstract

354,609. Suspending cables. BADDELEY, G. F., 33, Merton Hall Road, Wimbledon, London. Oct. 3, 1930, No. 29652. [Class 36.] In an overhead contact line system for electrically operated vehicles, the conductors act alternately as contact wires and messengers, crossing in the centre of each space. The contact wires are suspended from the messengers by droppers, and, in order that the tension in the messenger portions of the wires may be the same as that in the contact wire portions, short droppers, adapted to allow free movement of the contact wires in the direction of their length, are provided at the points of crossing of the conductors. In the embodiment the conductor 11 is suspended from the conductor 13 by droppers 15, and, on the other side of the midspan, the conductor 13 is suspended from the conductor 11 by droppers 17. Short droppers 19 are fitted near the crossing places 21. Each dropper 19, Fig. 4, comprises a wire loop which encircles one conductor 13, the loop ends being fixed to blocks 21, 23 drawn together by a bolt 25 to grip the conductor 11. Means for regulating the tension in the conductors is shown in Fig. 5. The conductor 13 is coiled upon itself in a spiral 35 between clamps 33 which are suspended, through springs 31, from one of the suspension insulators 2.