Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 177
erence in contraction andexpansion, but also for wear; yet the plug is not sorigid as to knock a cylinder head out before relievingthe water from the cylinder, and yet it is absolutelyadjusted to the diameter of the casing at all times, andis held there and allowed to get no larger during itswork… … PISTON VALVES AND BALANCED VALVES 171 Fig. /^ further illustrates the construction of thisvalv^e, giving end and sectional views of the differentparts. A common defect of snap ring piston valves isthat the steam pressure gets under the rings, andexpands them against the casing with the full forceof…
Locomotives
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