. The Street railway journal . carrier. meters (3 ft. 5 ins.). The tubes are covered with steelplates upon which a special Zbar is bolted, this forming theslot rail. Special steel castings act as tie-rods to hold theslot rails in position. This construction requires raisingthe conductor bars 12 cm. (4^ ins.) above their levelin the normal conduit. Special means to raise and lower December, 1899.] STREET RAILWAY JOURNAL. 849 the plow for the passage over this bridge are therefore of men in vaults under the street is also to be avoidednecessary. if possible. The St. Ouen-Champ de Mars line being
. The Street railway journal . carrier. meters (3 ft. 5 ins.). The tubes are covered with steelplates upon which a special Zbar is bolted, this forming theslot rail. Special steel castings act as tie-rods to hold theslot rails in position. This construction requires raisingthe conductor bars 12 cm. (4^ ins.) above their levelin the normal conduit. Special means to raise and lower December, 1899.] STREET RAILWAY JOURNAL. 849 the plow for the passage over this bridge are therefore of men in vaults under the street is also to be avoidednecessary. if possible. The St. Ouen-Champ de Mars line being partly trol- The problem has been very ingeniously solved on the Continental roads at Berlinand Brussels, and the latterjoads at Buda-Pesth. Ithas been recognized thatthe simplest and most prac-tical solution was to carrythe plow on the car always,and to provide the propermeans on the car of raisingit from or lowering it intothe conduit. The plows aredesigned to pass throughthe normal slot, thereforethey can be raised or low-. FIG. 5.—ARRANGEMENTS FOR WIDENING SLOT TOPERMIT REMOVAL OF PLOW ley and partly conduit special requirements arenecessary at the points of contact of these sys-tems to make it possible. The necessity of carsrunning at will on conduit and overhead systemsis one common to all European conduit problem has been solved on two unimport-ant lines in the United States by the crudemethod of attaching and detaching the plow atthese points. For an important line where thismanoeuvre must be made many hundreds of ELEVATION THE DIMENSIONS IN CIRCLES ARE THOSE OF A RIGHT HANDED SWITCH FIG. 3.—SECTIONS OF SLOT SWITCH MECHANISM SECTION C-D Street Railway Journal
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
