. The Street railway journal . f the protected typeapplied with a screw compressorare used. As the introduction of a suc-cessful electrically-welded trackpractically makes the life of arail limited only by the wear ofthe head, some calculations havebeen made at Buffalo as to theprobable wear of rails. On sometrack ordinarily having cars on2-minute headway (but duringthe Pan-American Expositionhaving cars on 30-second headway) the wear has been foundto be % in. in four years. The company now has over 100 miles of electrically-weldedtrack. The electric welding process, as carried on at Buffalowh
. The Street railway journal . f the protected typeapplied with a screw compressorare used. As the introduction of a suc-cessful electrically-welded trackpractically makes the life of arail limited only by the wear ofthe head, some calculations havebeen made at Buffalo as to theprobable wear of rails. On sometrack ordinarily having cars on2-minute headway (but duringthe Pan-American Expositionhaving cars on 30-second headway) the wear has been foundto be % in. in four years. The company now has over 100 miles of electrically-weldedtrack. The electric welding process, as carried on at Buffalowhen begun in 1899, was notable as being the first applicationon a large scale of a successful method of electrically weldingrail-joints, although the first experiments with this particular 332 STREET RAILWAY JOURNAL. [Vol. XXII. No. 9. method were made at Johnstown in 1897. Track constructionin Buffalo stands alone to-day as an example of the most ex-tensive application of electrically-welded rail-joints. The joint Rail 8k high. Street CROSS SECTION OF STANDARD 9-IN. TRACK IN BOSTONRail shfeh Brick paving blocks, »J4 wWc, 4*lecp, 8lj*l.»« J nj ^ • 0; <?; ^concrete Street CROSS SECTION OF STANDARD TRACK WITH 5-IN. RAIL IN BOSTON plates are welded to the web of the rail by means of bosses onthe plates, which limit the area of the welding to the area of thebosses, and so insure a high temperature at the point of weld-ing. There is one boss directly at the joint between the rails,and in addition a boss at each end of the joint plate. The centerbosses are welded first and those at the ends afterwards. Inthe welding five cars are employed. One of these is the weldingcar proper, which carries the welding clamps and weldingtransformers. The second carries a rotary converter, whichreceives direct current from the trolley and supplies alternatingcurrent to the welding transformer. The third car has a motor-driven booster for raising the trolley voltage whene
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
