. Electric railway journal . rements, taken in the field, onthe frog to be replaced. The base of the rail is thenspot welded to the base plate at a number of points andthe frog checked again before proceeding with the heavywelding. If the heavy welding is proceeded with imme-diately, there is great danger of the base plate bucklingand drawing the whole frog out of shape. The platesat the center are welded top and bottom to the rail, the welding at the bottom being heavy enough to weld theplate, bottom flange of the rail and the base plate alltogether. The grooves are filled in with the welder
. Electric railway journal . rements, taken in the field, onthe frog to be replaced. The base of the rail is thenspot welded to the base plate at a number of points andthe frog checked again before proceeding with the heavywelding. If the heavy welding is proceeded with imme-diately, there is great danger of the base plate bucklingand drawing the whole frog out of shape. The platesat the center are welded top and bottom to the rail, the welding at the bottom being heavy enough to weld theplate, bottom flange of the rail and the base plate alltogether. The grooves are filled in with the welder at thepoint and about 8 in. along each arm to form aflange bearing and then ground down to a smooth run-ning surface. A hard grade of steel is used to formthe flange bearing, soft iron being used in welding theplates and rail together. This flange bearing is one ofthe most important points, since it is on this that thesmooth riding and wearing quality of the frog feature can best be seen in Figs. 5, 6 and 7. The. FIG. 4—FROG PLACED AT LAKE STREET AND DRIVING PARK bolts are pulled up as tight as possible and the nutswelded so that there is no possibility of their workingloose. In the accompanying illustrations, Fig. 1 shows afrog at State and Central Streets placed in December,1914. This piece is subject to a traffic averaging 41,100cars per year. There was no flange bearing on this frogand it has worked loose. The fine material is buckwheatstone placed over temporary paving repairs. The frog in Fig. 2 at State and Lyell Streets, wasplaced in June, 1914. A traffic of 146,500 cars per yearpasses over this frog. The frog in Fig. 3, which was installed in the same FIGS. 5, 6 AND 7—INSTALLATION OF FROGS SUBJECT TO A TRAFFIC OF MORE THAN 200,000 CARS PER YEAR 408 ELECTRIC RAILWAY JOURNAL [Vol. XLVIII, No. 10 Cost of Material and Labor for Making a Prog %-ton scrap rail and joint plates, at $13 $ Scrap base plate 40-lb. welding iron, at 5%c 1 10-lb. weld
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
