. Electric railway journal . il is a , carried on Ohio Brass Company porcelain in-sulators and bonded with two 250,000-circ. mil compressedterminal foot bonds. This track is ballasted with washedgravel. Its grades and curves conform to those of theoriginal road. TRACK AND THIRD-RAIL BONDS The track of the original third-rail divisions, when built,was bonded at each joint with two 250,000-circ. milProtected rail bonds 12 in. long and with 16 The third-rail, weighing 100 lb. per yard andln 33-ft. lengths, was bonded with two 500,000-circ. mil foot bonds per joint.
. Electric railway journal . il is a , carried on Ohio Brass Company porcelain in-sulators and bonded with two 250,000-circ. mil compressedterminal foot bonds. This track is ballasted with washedgravel. Its grades and curves conform to those of theoriginal road. TRACK AND THIRD-RAIL BONDS The track of the original third-rail divisions, when built,was bonded at each joint with two 250,000-circ. milProtected rail bonds 12 in. long and with 16 The third-rail, weighing 100 lb. per yard andln 33-ft. lengths, was bonded with two 500,000-circ. mil foot bonds per joint. These bonds are U-shaped andhave i-in. terminals. Both styles of bond were furnishedby the Electric Service Supplies Company, and were appliedin large part by the use of hydraulic punches and com-pressors. The apparatus of the rail-bonding department now in-cludes a bonding car, furnished by the Electric RailwayImprovement Company, for electrically welding bonds tothe rail and equipped with various types and sizes of clamps. Aurora, Elgin & Chicago—Ballasted Floor Concrete Bridge and electrodes, so that any capacity of bond may be appliedto the head or web of either the running rail or the third-rail. The company also owns and operates a test car ofthe Herrick type for making an autographic record of thecondition of all bonds. This car is run over the systemperiodically. A test by it of the condition of all the third-rail tracks, conducted six years after the bonds had beeninstalled, showed that 98 per cent of the bonds were all of the 2 per cent defective bonds were foundeither at special track work or at highway crossings where
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
