. Electric railway journal . ne ofthese sets of grids on the locomotive. Table I. Removing burnt grids from locomotives, two men, two hours, at 50 cents per hour $ Cost of burned grids scrapped, average eight grids at $ each Grinding and cleaning contact surfaces, two men six hours and two men four hours, at 50 cents per hour Total $ As a result of unsatisfactory experience with themaintenance of resistance grids by the method describedit was decided to look into the matter of welding. Sev-eral sets of grids were welded by means of acetylene andthey stood up well. For ou
. Electric railway journal . ne ofthese sets of grids on the locomotive. Table I. Removing burnt grids from locomotives, two men, two hours, at 50 cents per hour $ Cost of burned grids scrapped, average eight grids at $ each Grinding and cleaning contact surfaces, two men six hours and two men four hours, at 50 cents per hour Total $ As a result of unsatisfactory experience with themaintenance of resistance grids by the method describedit was decided to look into the matter of welding. Sev-eral sets of grids were welded by means of acetylene andthey stood up well. For our conditions this methodproved expensive and necessitated considerable delay inrepair. While electric welding proved cheaper, it shouldbe understood that I am not attempting to compare thetwo excellent methods but simply to give the results ofthe practice in these shops. After a preliminary study of the subject we developeda routine of electrically welding the grids, details of February 12, 1916] ELECTRIC RAILWAY JOURNAL 323. REPAIRING GRIDS—JIGS WITH GRIDS MOUNTED FOR WELDING(LEFT) AND WELDED (right) which are given later in this article, and as a result thecost has been cut down to the amount which is shownin Table II. Table II. Removing burnt grids from locomotive, two men two hours, at 50 cents per hour $ Grinding, cleaning and repairing grids, one man two hours, at 34 cents per hour .68 Assembling grids for welding, one man, one hour, at 34 cents per hour .34 Welding grids, one man three hours, at 34 cents per hour. Assembling grids on locomotive, two men three hours, at 50 cents per hour Cost of electrical energy, 33 , at 1 cent per kilowatt-hour -33 Total $ In comparing Tables I and II it will be noted thatthere are savings with the electric welding due to theelimination of scrap and to reduction in labor. Out offifty-six sets of grids welded between March 1 and , 1915, there was an average saving of $ per set asshown by the tables, or
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