The steam engine and turbine; a text-book for engineering colleges (1911)
Heck, Robert Culbertson Hays, 1870- · New York, D. Van Nostrand company · leaf 409
n with Fig. 255 III,the diagram is self-explanatory. One point to be noted, especiallymarked for the cut-offs designated +3 and —3, is that the valve edgeapproaches the cut-off position more rapidly from the negative thanfrom the positive side, the curvature of the valve circle showing thisvery… … Fig. 256. — Control byVariable Lap. 41 (9)] THE DOUBLE-VALVE GEAR. 395 possibility exists only with extreme proportions, and belongs rather tothe method of regulation typified in Fig. 257. In Fig. 257 I, with a negative lap equal to half of Vy, the valvecircle is located for cut-off at 0.1, at 0.3,…
Steam-engines · Steam-turbines
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