| 摘要 |
1280714 Conductors INSUL-8-CORP 30 Oct 1969 [30 Oct 1968] 53094/69 Heading B7L [Also in Division H2] A composite electrical conductor such as used in an electrical distribution system for bridge cranes, trolley cars etc; comprises an elongate bar 12 of conductive material i.e. aluminium, an elongate cap 20 of a harder conductive material i.e. steel, the bar and the cap being secured together by longitudinally spaced explosively driven nails 24, the cap 20 having a contact surface for engaging a current collector 26. The bar 26 has slots thereon permitting the bar to be distorted when the cap legs 21, 22 are forced into engagement with the bar. The distance between the inner surface of the cap legs is initally slightly smaller than the corresponding distance between the side walls of the bar. The conductor bar may be brushed or secured to remove oxides formed on the surface and then a conductive grease is applied (Figs. 3, 4, not shown) before installing the cap into the bar. Fig. 7 (not shown) indicates a composite conductor whose bar portion has only one slot on either side of the I-section. |
