Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 399
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 ci^ank has completed 120°, or two-thirds of the 386 Steam Engineering half revolution^ but the point of cut off on the indicatordiagram shows that the… … 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…
![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-385-266.webp)
