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 288
gth of the radiusbar equal to that of the links, to meet other requirements. Q. How may the lead be increased? A. By reducing the lap, which would, however, also slightlyadvance the cut-off point. Q. What is the effect of increasing the lap?. A. To shorten the cut-off. Q. Give a diagram of the… … Fig. 173. Walschaert Valve Diagram. perpendicular RC from AB, cutting the arc ACB, decides thelead; with this latter as a radius and on the same scale as thevalve motion, draw an arc with A as the center. From Cdraw a line tangent to the lead circle around A; then the lapof the valve will be equal…
Locomotives
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