Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . Figure 216A complete dome. on the top and the bottom, is being replaced by some formof throttle which admits steam from the highest and ofcourse the dryest portion of the dome. A good exampleof one of these throttles is seen in Fig. 217A. This is 235 Domes. known as the Rushton type of throttle. The steamenters the throttle at Sx and S2, the latter coming throughthe center of the valve at V. The valve is raised with abell crank by the rod R, which extends on through to thethrottle lever. The
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . Figure 216A complete dome. on the top and the bottom, is being replaced by some formof throttle which admits steam from the highest and ofcourse the dryest portion of the dome. A good exampleof one of these throttles is seen in Fig. 217A. This is 235 Domes. known as the Rushton type of throttle. The steamenters the throttle at Sx and S2, the latter coming throughthe center of the valve at V. The valve is raised with abell crank by the rod R, which extends on through to thethrottle lever. The pressure, which tends to keep thisvalve closed, is exerted on the difference of the areas inthe upper and the lower opening and this is greatest whenthe valve is closed. For this reason a pin P± near the. °fef-<^— -—TT^mE-L, ~T ^^a Figure 217A low dome from a Wooten boiler. The Berry- Collard Co. fulcrum, first comes into operation and on account of theshort arm, the valve is readily raised. After it has ad-vanced a certain distance, the pin P2 comes into play andthe valve is opened more rapidly. H is the lug forbolting on the dry pipe. L takes a cross brace which issupported to the side of the dome. The pipe Y is alteredto suit the various heights. 236
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Keywords: ., bookcentury1900, bookdecade1910, bookidlocomotivebo, bookyear1912
