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 437
-cranks. The exhaust valve motion is direct. Thesteam and exhaust eccentrics both lead the crank. 424 Steam Engineering Fig. 154 shows the relative position of the crank andsteam eccentric at about the point A on the dotted lineE X, or it is about 90 degrees plus 37 degrees for lap andlead ahead of… … Fig. 154 Fig. 152 shows both eccentrics at 90 degrees, while Fig.153 shows the lead of the steam valve distorted, for clear-ness of ilustration, but the wrist-crank is in the same ap-proximate position as when the crank is on the center andthe eccentric is, at its greatest throw, advanced to the…
