. Railway mechanical engineer . Fixed/hinfCenfer Afa/n\ \ 1/^ Plumb Fig. 25 lead is done on the valve rod and automatically takes careof any reasonable error in the vertical location of the convenient rule is as follows: To square the lead,adjust the valve rod only. To equalize the cut-off adjust thtlink until a still valve is obtained when the engine is oneither dead center and a square cut-off is the result. Ifover-all cut-off on one side is greater than the other, shortenthe auxiliar\- reach rod 14 in. for each inch of cut-off it isdesired to reduce. PATCHING PISTON VALVE CYLINDER An
. Railway mechanical engineer . Fixed/hinfCenfer Afa/n\ \ 1/^ Plumb Fig. 25 lead is done on the valve rod and automatically takes careof any reasonable error in the vertical location of the convenient rule is as follows: To square the lead,adjust the valve rod only. To equalize the cut-off adjust thtlink until a still valve is obtained when the engine is oneither dead center and a square cut-off is the result. Ifover-all cut-off on one side is greater than the other, shortenthe auxiliar\- reach rod 14 in. for each inch of cut-off it isdesired to reduce. PATCHING PISTON VALVE CYLINDER An interesting job of welding, performed in the repairingof a pair of piston valve cylinders, was recentlx done at theStony Island shop of the New York, Chicago Sc St. Louis. The broken parts of the cylinders were first drilled andchipped off flush with the main body of the casting, form-ing a smooth surface. Two flanged patches, as shown in. The Broken Cylinder as Received in the Shop the sketch, were formed of i-in. boiler plate and a 2-in. byS-in. bv 5-in. angle. The boiler plate extended to the centerline of the piston valve cylinder, as shown, and the backIialf of the circle was formed of the >4-in. angle, the twoparts of the patch being welded together with holes for the valve chamber were then cut out with anacetvlene torch. A ring was shaped from ■4-in. steel plate and faced andwelded to the main patch, forming the valve chamber headjoint and Ihe body for the cylinder head studs. Four holes were punched in the patch, the patch put onthe C)linder, and the flange heated and set up with aflatter. After the patch was properly shaped the holeswere drilled in the flanges, on centers, the patchagain applied and reset. The patch was then taken offand put on a boring mill and the joint faced and the holebored to admit the valve. Tile jjatcb was then reapplied to the cylinder with a
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
