. Electric railway journal . ranging from 120 deg. to 250deg. Fahr. The results both for exteriors and interiorsare reported to be most satisfactory, not only throughthe quickness with which the work can be done but also system of arc welding for this purpose were the Philadel-phia Rapid Transit, the Pittsburgh Railways, the UnitedRailroads of San Francisco, the Third Avenue Railwayof New York and the Montreal Tramways. The earlierwelding was limited to armature shafts and other smallwork, but the descriptions of the San Francisco and ThirdAvenue installations, as published in the ELECTRIC RAI
. Electric railway journal . ranging from 120 deg. to 250deg. Fahr. The results both for exteriors and interiorsare reported to be most satisfactory, not only throughthe quickness with which the work can be done but also system of arc welding for this purpose were the Philadel-phia Rapid Transit, the Pittsburgh Railways, the UnitedRailroads of San Francisco, the Third Avenue Railwayof New York and the Montreal Tramways. The earlierwelding was limited to armature shafts and other smallwork, but the descriptions of the San Francisco and ThirdAvenue installations, as published in the ELECTRIC RAIL-WAY JOURNAL of May 17 and June 21, 1913, respec-tively, show the amazing versatility of electric welding,not only on truck frames, axles and shafts, but for thecomplete reconstruction of motors for oil instead of greaselubrication, for filling dowel-pin holes, patching gear casesand similar building-up operations. It is customary to step down the line voltage to from50 volts to 80 volts through grid or water-barrel resist-. Welding with Electric Arc, Third Avenue Railway, New York in the improved appearance of the cars both inside andout and in the superior hardness and ability to resist theabrasive action of dust possessed by the enamel. The cost of the process, including the expense incidentalto the heating of the kiln or car interior, is about equal tothat of high-grade painting as ordinarily carried out, sothat on account of the greater durability of the coveringthe baked enamel process effects a net saving over thecommon method exclusive of the benefit obtained throughthe 75 per cent reduction in the time spent by the car inthe paint shop. SPECIAL WELDING PROCESSES The practice of prolonging the life of worn or damagedequipment by welding promises to become widespread nowthat the causes for initial failures have been learned andcorrected. The process came into practical use onlyabout 1910, and among the early companies to adopt the ances, as all railway companies do not
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