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 388
oot of the arch inside the valve represent insidelap, and may be added to or taken from the inside edges ofthe valve, according as more or less compression is desired.The dotted lines,, 0 L, 0 L represent outside lap. Motion is imparted to the valve through the mediumof the eccentric. If the valve… … Fig. 117 necessary to move the eccentric still farther ahead of thecrank, and this farther advance is termed angular advance,lap angle for lap, and lead angle for lead. Assuming the piston to be at the end of the stroke to-wards the crank, in other words, the engine to be on thedead center, the…
