. Electric railway journal . of frogs and mates when worn short andoff center are readily replaced. Switches and mateson which the bulk of the traffic takes the curve, becomeworn low on one side, causing derailments, etc. Thistrouble can be mitigated for a time by grinding, butbefore long the only cure is replacement. We remedythis trouble by building the tread up to the originalheight and shape. To illustrate the saving, the following figures arean approximation of the value of such work to thisroad during 1918. All figures are based on the assump-tion that the life of each piece of special w
. Electric railway journal . of frogs and mates when worn short andoff center are readily replaced. Switches and mateson which the bulk of the traffic takes the curve, becomeworn low on one side, causing derailments, etc. Thistrouble can be mitigated for a time by grinding, butbefore long the only cure is replacement. We remedythis trouble by building the tread up to the originalheight and shape. To illustrate the saving, the following figures arean approximation of the value of such work to thisroad during 1918. All figures are based on the assump-tion that the life of each piece of special work isprolonged one year, thus deferring expenditures andearning the depreciation and interest charges. No al-lowance is made for pieces saved from the scrap pileand returned to remaining working life. Hard Steel ./Deposit Floor 526 pieces of special work treated representing a value of $159, Interest for one year on the deferred investment at 6 per cent. . $9, at 12\ per cent per year $ 19, 6xfPlate: ■ lxlBar- -12 XI Plate24Ig. bent > Ili lg. 24 lg Electric Welds p- 24--—*\ Diagram of Base Plate Total cost of the work—all charges included. $29,$1, This is a very substantial saving and proves beyondquestion the value of repairing special work. Special work of the hard-center type is treated inexactly the same manner and with equally satisfactoryresults. Our method and materials are of the building in large breaks or holes, the first mate-rial used is bare l-m. round common mild steel elec-trodes. The wearing top is built on with bare electrodes of low-grade tool steel having a carboncontent of to , which has proved to be goodmaterial at a reasonable price. The current is keptat the lowest point which will give proper fusion, andis about 140 amp. at 30 to 40 volts across the welding operations are ever carried on at 250 volts,and the standard resistance welders deliver about 70volts, whi
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