. Railway mechanical engineer . d. The drilling-head is turnable around the horizontal axis and can beswiveled 360 deg. around the column and also can bemoved up and down; besides this the column with its foot-plate can be moved horizontally along the carriage spindle therefore can be adjusted in every machine drills holes up to \y2 in. into the solid andtaps up to 1]4 in. By the use of a boring bar, holes up to4 in. in diameter can be drilled. The up-and-down move-ment of the drilling gear on the column is accomplished bymotor power. INTERCEPTING VALVE FOR MALLETLOC

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. Railway mechanical engineer . d. The drilling-head is turnable around the horizontal axis and can beswiveled 360 deg. around the column and also can bemoved up and down; besides this the column with its foot-plate can be moved horizontally along the carriage spindle therefore can be adjusted in every machine drills holes up to \y2 in. into the solid andtaps up to 1]4 in. By the use of a boring bar, holes up to4 in. in diameter can be drilled. The up-and-down move-ment of the drilling gear on the column is accomplished bymotor power. INTERCEPTING VALVE FOR MALLETLOCOMOTIVES In the accompanying drawings are shown the details andmethod of operation of an intercepting valve which has re-cently been developed by the Economy Devices York, for use on Mallet compound locomotives. It isknown as the Simplex intercepting valve and is shown asapplied to cylinders which are cast integral with half is enclosed in a separate lagged and jacketed casing in F tompoand Pas/f<3. n F— E ■> W1 in l Dash . t~~of 1—jia :> ■

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering