Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules (1908)
National correspondence school of railroading, Chicago. [from old catalog] · [Chicago] · leaf 168
and D are bored only one-eighthinch larger than the valve-stem. Packing Rings. The packing rings F are made ofwhite metal of special composition, and are generally twoin number, consisting of four segmental pieces, each hav-ing broken joints arranged in such a manner that theyform steam-tight rings… … PLATE 45. sition by the retaining spring H, which however does notaid in making a steam-tight joint on the rod. General Information. Unlike most forms of pack- 158 LUBRICATION. ing, no heavy coil spring is used to secure a steam-tightjoint between the packing rings and the piston. This packing…
Locomotives
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