Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 238
2C01. … Lead. In the stationary link-motions, a constant lead throughout the forward and backwardis obtained by circling the link to the radius of the valve-rod link, and the same lead may be for thefront and back strokes. In the shifting link motion, the lead essentially varies with the expansion,…
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
