. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . -thirds of the weight of the truck is trans-ferred to the springs. Esf)ecial attention is directed to the bolster and frame,not only because of their size but for the complication oftheir shape and the difficulties that must have been en- March. 1926 RAILWAY AND LOCOMOTIVE ENGINEERING 69 countered in casting them. They were cast by the Com-monwealth Steel Co. The bolster is suspended from the transoms by fourhangers D. These hangers are attached, at their lowerends, to the bolster by the pins
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . -thirds of the weight of the truck is trans-ferred to the springs. Esf)ecial attention is directed to the bolster and frame,not only because of their size but for the complication oftheir shape and the difficulties that must have been en- March. 1926 RAILWAY AND LOCOMOTIVE ENGINEERING 69 countered in casting them. They were cast by the Com-monwealth Steel Co. The bolster is suspended from the transoms by fourhangers D. These hangers are attached, at their lowerends, to the bolster by the pins £. which are Sy^ in. indiameter, and pass through the two upwardly extendinglegs of the L Section, as shown at F of the arms A. Thisgives the pins a central bearing. At their upjjer ends the hangers are carried by two2>S in. diameter pins C. It will be noted that the outerone of these pins is located vertically over the center ofthe lower hanger pin. while the other stands in towardsthe truck center by a distance of 3 in. The result of thisarrangement is that when the bolster swings in either. ccentric Crank of the Three-Cylinder LocoPacific ^e of the Southe direction, it turns about the inner pin on the side of thedirection of motion and is raised accordingly ; while onthe other side, it swings alx)Ut the outer pin. and. as thispin is directly alxne the lower one, the bolster on thatside is raised only by the amount due to the arc of thecircle through which it swings. The tendency of thesuspension is, thus, to bring the bolster hack to its centralposition. The semi-elliptic journal Ixix springs and the e(|ualizersare placed Ijetween the vertical legs of the side the weight of the truck is carried by rollers G,which are beneath the horizontal upper portion of the sideframe and rest on a seat on the top of the equalizers. Theends of the equalizers are carried at 1 by the hangers , in turn, are suf/ported by the ends of the semi-elliptic springs. The
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
