The steam engine and turbine; a text-book for engineering colleges (1911)
Heck, Robert Culbertson Hays, 1870- · New York, D. Van Nostrand company · leaf 385
Fig. 224. — Combined Diagrams for Valve and Piston. — which is shown by the distance from Q to the point where the curveis tangent to the end line — almost to zero at the head end, while nearlydoubling it at the crank end, besides changing the widths of the port … Fig. 225. — The Valve and Piston Diagram. openings all through both admission periods. A diagram of this typefurnishes the most satisfactory data for a comparison of valve actionwith realized steam distribution, as shown by the indicator; and thismatter of symmetry of action will be more fully…
Steam-engines · Steam-turbines
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