. The Street railway journal . FIG. 35.—A CHICAGO SURFACE AND STEAM RAILROAD CROSSING employed, this wire being 22 ins. long and coiled aroundthree times to take up any vibration. ELEVATED RAILWAY CONSTRUCTION INCHICAGO The new Northwestern Elevated Railway, built from thebeginning with the intention of using electricity as a FIG. 36.—CHICAGO CABLE CROSSING the local trains will all stop, and will make an averagespeed of 14 miles an hour, but the express trains will stoponly at every third station, and will make an average speedof 30 miles an hour, with only about twelve seconds deadtime for e
. The Street railway journal . FIG. 35.—A CHICAGO SURFACE AND STEAM RAILROAD CROSSING employed, this wire being 22 ins. long and coiled aroundthree times to take up any vibration. ELEVATED RAILWAY CONSTRUCTION INCHICAGO The new Northwestern Elevated Railway, built from thebeginning with the intention of using electricity as a FIG. 36.—CHICAGO CABLE CROSSING the local trains will all stop, and will make an averagespeed of 14 miles an hour, but the express trains will stoponly at every third station, and will make an average speedof 30 miles an hour, with only about twelve seconds deadtime for each stop. All the stations except two are located beneath the struc-ture, and one agent will sell tickets for the four lines. At. FIG. 37.—LAYING 60-FT. RAILS ON NORTHWESTERN ELEVATED RAILWAY motive power, is now approaching completion, and it is the express stations the structure swells out to provide forexpected that it will be in operation by April 1, 1900. It the necessary passenger platforms. is a two-track structure for the first two miles, and a four- The supporting structure is mostly of the plate girder October, 1899.] STREET RAILWAY JOURNAL. 643 type, but every 200 ft. comes a brace bent, shown in , by which the structure is thoroughly braced, andanchored to the ground, so as to prevent oscillation. In the process of erecting the structure the braces andunions are riveted by means of pneumatic tools designed,by the Chicago Pneumatic Tool Company. For operatingthe riveters gasoline engines are provided, which drive thecompressors, the latter being of the Fairbanks & Morsestyle. The yokes of the large riveters have a throat of 50ins., and are made of 4^-in. iron pipe. These are supportedby a
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
