. Railway mechanical engineer . h-4—-i M ^ ■! , «.-. .i/ Fig. 13—Lockyer Throttle Valve for North Eastern J-ocomotives right of the throttle pipe casting and putting the upper partthrough the top of the casting in the customary way, the two. Fig. 11 —Boiler Barrel Drilling Machine 512 RAILWAY MECHANICAL ENGLXEER Vol. 94, No. 8 parts fitting snugly to each other. They are bolted in positionon a spindle. This construction permits of any combinationof valve diameters desired. It will be noted from the drawing that the upper valvehas a conical baffle whereas the lower valve has a straightcylindric
. Railway mechanical engineer . h-4—-i M ^ ■! , «.-. .i/ Fig. 13—Lockyer Throttle Valve for North Eastern J-ocomotives right of the throttle pipe casting and putting the upper partthrough the top of the casting in the customary way, the two. Fig. 11 —Boiler Barrel Drilling Machine 512 RAILWAY MECHANICAL ENGLXEER Vol. 94, No. 8 parts fitting snugly to each other. They are bolted in positionon a spindle. This construction permits of any combinationof valve diameters desired. It will be noted from the drawing that the upper valvehas a conical baffle whereas the lower valve has a straightcylindrical base. This provides a gradual flow of steaminto the dry jiipe when the tlirottlc is opened. There is anindicator placed on the throttle handle in the back head(Fig. 14) which gives tlie engineer indication of the throttleopening. The action of the baffles is such that the differentpositions of the throttle quadrant provide a steam area ac-cording to the following table: Total areaDivision open to steam, of quadrant square inches 7 8 9 10 11 These engines are also eciuipped with a steam reversingmechanism which is indicated in the general arrangementdrawing. The steam cylinders for operating the gear
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
