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 276
. THE ALLAN GEAR. Q. By what style of valve motion may this difference insteam distribution in forward or backzvard motion be obviated? A. By one having a straight link slot, and in which there isa link and a radius rod, the former being raised as the latteris lowered. Q, What name is given to such… … Fig. 167A. Allan Valve Gear, Open Rods. Q. Can this link motion or gear be used with crossed rods? A. Yes. Q. What is the effect of the link position upon the lead,with the Allan gear? A. With crossed rods, the lead decreases with increase ofexpansion; that is, the earlier the cut-off the less the…
Locomotives
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