Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 92
ports S, E, 8, in the sectionaldrawing at the bottom of the figure, lines are drawn perpendicularlyto any convenient length from each edge of the respective ports,and this length is subdivided to represent equal portions of thepiston-stroke. A valve ellipse is then drawn from centre A on… … Fi3. 73. 76 STEAM-ENGINE THEORY AND PRACTICE. o£ the respective steam and exhaust edges of the valve in mid-position. Several ellipses are usually drawn for different amounts of travel ofthe valve as the link is notched up (see Fig. 87). Two ellipses are drawn in this case, and, referring to the…
Steam-engines
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