. The street railway review . WELDING MACHINE AT WORK. from one to two minutes to make each weld. Thepotential at the welder is transformed down to four direct current transformer takes from the line about250 amperes at 500 volts. The operation of welding is as follows: The ends ofthe rails are butted together by driving a wedge in thejoint ahead. The welding car is then run over the joint weld is being made. The bottom lugs (Numbers i and2 in Figure 2) are then placed in position and the contactclamps screwed down upon them. When the circuit ofthe secondary coil is thus completed, t
. The street railway review . WELDING MACHINE AT WORK. from one to two minutes to make each weld. Thepotential at the welder is transformed down to four direct current transformer takes from the line about250 amperes at 500 volts. The operation of welding is as follows: The ends ofthe rails are butted together by driving a wedge in thejoint ahead. The welding car is then run over the joint weld is being made. The bottom lugs (Numbers i and2 in Figure 2) are then placed in position and the contactclamps screwed down upon them. When the circuit ofthe secondary coil is thus completed, the switch on thewelder is closed and the iron core of the induction coilslowly raised. Almost instantly a dark, ruddy colorappears in the lugs which gradually brightens until the 2()6 ^licd/l^^aiWayj^yicvv^ welding heat is reached. A quick turn of the screwwhich operates the toggle joints brings the lugs firmlyup against the rail and forces the plastic steel into thejoint between the ends of the rails. The upper lugs(Numbers
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
