Locomotive catechism; an up-to-date, practical and complete work on the locomotive--treating on the design, construction, repair and running of all kinds of locomotives .. (1908)
Grimshaw, Robert, 1850- [from old catalog] · New York, The N. W. Henley publishing company · leaf 250
Fig. 143. Allen Balanced Valve, Pennsylvania Railroad, Class O.Lengthwise Vertical Section to one side of Center. BRISTOL ROLLER VALVES. 243 A. Same as above, only minus the area of one side of theAllen port. Q. How was the Bristol roller slide valve made?A. The valve rested in a number of small… … Fig. 144. Bristol Roller Valve. having a little play in their journals. Steel plates were attachedto the valve on each side and others to the valve seat, so thatthe rollers rested on the latter below and the valve was
Locomotives
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