GB905785A - Electric power distribution system - Google Patents

Abstract

905,785. Supplying current to moving conductors. E.M.S. ELECTRICAL PRODUCTS Ltd. Feb. 22, 1961 [May 12, 1960], No. 16743/60. Class 38 (1). In a distribution system having a wheeled trolley 17 providing a travelling tapping to one or more bus-bars 23 . . . 26, supported inside a duct, the duct comprises upper and lower plates 10, 11, respectively, Fig. 1, with inwardly facing ridges forming rails 13, 14 for upper and lower pairs of trolley wheels 15, 16, respectively, while rearwardly of the rails, plates 10, 11 are spaced apart by two or more transverse members 18. Members 18, of the form described in Specification 905,787, provide a trough in which are held insulating blocks 21 supporting the bus-bars 23 . . . 26, for contact with their respective contacts 23a . . . 26a, carried by the trolley. Contacts 23a . . . 26a are mounted in support frames 29 . . . 32 of the trolley, and the ends of the frames are held against a rebate 28, Fig. 7, by cross-bars 33, 34. The trolley has a cranked extension 42 provided with a flange 43 for supporting a terminal box (not shown). The trolley wheels are supported as described in Specification 905,788. Each end of plate 10 is secured within channels of ridge 45, Fig. 3, of a coating forming a connector 38 between adjacent ducts, the connector 38 having flanges 44 on which the edges of the front covers 39 of the ducts abut. Each cover 39 is detachably pivoted at 40, Fig. 1, as described in Specification 905,786, and is bolted to portion 38a of connector 38 at 41. Connector 38 may have a central opening 49 to give access for connectors to the bus-bars (not shown). Adjacent plates 11 are connected by a connector (Figs. 4, 5, not shown) also with opposed channels on either side of a ridge for receiving the ends of plates 11. Each duct has a rear cover-plate 20 having flanges 19 held in rebates of the transverse members 18.