. The Street railway journal . each conductor. The ends of thesespan wires are attached to porcelain insulatorsof special type (Fig. 13). The ambroin insulators consist of a cast-ironbell, holding a steel bolt embedden in ambroin,and having at its lower end a mechanical 14 shows the section of this insulator. On curves of 3000-ft. radius and less the con-tact-wires are suspended on double poles withspan connection. Figs. 15 and 16; on curves ofgreater radius and on tangents they aremounted on single-bracket poles. Fig. 17, and inthe stations on douljle-bracket poles, Figs. 18 and 19.
. The Street railway journal . each conductor. The ends of thesespan wires are attached to porcelain insulatorsof special type (Fig. 13). The ambroin insulators consist of a cast-ironbell, holding a steel bolt embedden in ambroin,and having at its lower end a mechanical 14 shows the section of this insulator. On curves of 3000-ft. radius and less the con-tact-wires are suspended on double poles withspan connection. Figs. 15 and 16; on curves ofgreater radius and on tangents they aremounted on single-bracket poles. Fig. 17, and inthe stations on douljle-bracket poles, Figs. 18 and 19. To prevent collisions at stations a section of the contact-wireof looo-ft. length on each side of each station is isolated bysection insulators. Fig. 20, and is disconnected unless the sema-phore shows clear. The switch in the station, by which thissection is made alive, cannot be inserted until the correspond-ing semaphore or the distance signal has Ijeen adjusted atline free. In addition the Webb-Thomson train staff svstem.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
