Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 399
n that theselatter events are controlled by the inside lap, which hasnot been changed. In Fig. 125 the valve is shown as cutting off the steamwhen the crank has completed 120°, or two-thirds of the 386 Steam Engineering half revolution, but the point of cut off on the indicatordiagram shows that… … Fig. 128 complete the stroke from this point than the piston does.In order to cause the valve to cut off earlier, say at one-half stroke, it will be necessary to do one of two things,either to increase the outside lap, which would have atendency to cause admission to occur too late, or the angleof…
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