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 240
Fig. 135 Slide Valve with Lap Added. … Fig. 136. Slide Valve with Lap Added. the end ports. In Fig. 135, where the valve is in mid-position,the outside lap is represented by the extra heavily hatchedportions at both ends. In Fig. 136 there is no lap. Q. What is the object of outside lap? A. To close the end ports to steam before the…
Locomotives
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