. The Street railway journal . onstruction formed upon their THE STREET RAILWAY JOURNAL. 965 ends. When the tubes between two ormore brackets are in place, the space be-tween the brackets and around the con-duit channel is filled with a suitable ce-ment or concrete, which securely embedsand protects the tubes and serves as a sup-port for the paving blocks. At intervals of one or two blocks, man-holes are provided for gaining access to theducts or tubes, and for making connectionbetween the conductors or wires carriedin the main conduit and those of branch ordistributing conduits at street inte
. The Street railway journal . onstruction formed upon their THE STREET RAILWAY JOURNAL. 965 ends. When the tubes between two ormore brackets are in place, the space be-tween the brackets and around the con-duit channel is filled with a suitable ce-ment or concrete, which securely embedsand protects the tubes and serves as a sup-port for the paving blocks. At intervals of one or two blocks, man-holes are provided for gaining access to theducts or tubes, and for making connectionbetween the conductors or wires carriedin the main conduit and those of branch ordistributing conduits at street intersec-tions. The interior of the paper ducts is per-fectly smooth, and the additional expensefor providing and laying them is compar-atively slight, a fact that especially com-mends them to localities where the bury-ing of overhead wires is receiving consid-eration. The depth of conduit channel necessaryis bat 6 in., and the entire depth of conduitshown in Fig. 1 and 2, measured from thestreet surface, does not exceed 18 in. It. ORDINARY CABLE RAILWAY CONDUIT. will be apparent that the wire ducts arenot essential to the conduit, but may beomitted in localities where they are not re-quired. This system provides for the opera-tion of both electric and cable railwaysfrom the same conduit, as also the conver-sion of a cable into an electric railwav. S. H. Shorts Electric Road at Colum-bus, 0. The newShort-Nesmith system* of Over-head Series Electrical Railway was for thefirst time put into operation a few dayssince on one of the lines of the ColumbusConsolidated Street Railway Co., at Colum-bus, O., and was operated with signal suc-cess. On this line there are four J in. cop-per wires, supported above the tracks uponcables which cross the street and are at-tached to poles at each end. Each pair ofwires is 7 in. apart and so supported thatfour-wheeled trolleys may run along uponthem. Each trolley has wires passingdown to the roof of the car, by which thecurrent is conveyed to the mot
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
