Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives (1916)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co., pub. for Sears, Roebuck & co. · leaf 165
inside, as shown inFig. 73, the movement of the valve is reversed, as isthe method of setting also. As it is very essentialthat the packing rings at each end of a piston valve be |steam-tight, a certain element of friction is introducedin this manner. In the larger number of cases wherepiston… … Figure 72 the exhaust steam. Another advantage is that ofhaving only exhaust pressure against which to packthe valve rods, and make the joints for the heads ofthe valve chamber. In taking charge of an engine having piston valves,an engineer should always first look her over andnote the positions of…
Locomotives
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