Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 355
ertical lines be projected from points dd to thehorizontal centre line through o, and cutting it at ee respectively, z 338 STEAM-ENGINE THEORY AND PRACTICE. then ee is the diameter of the virtual or equivalent eccentric givingthe movement dd! to the wrist-pin, and the throw of the actualQR… … provides for giving the valve small movements when closed, andlarge, and therefore quick, movements when the port is open. Thisreduces the power required to drive the valve gear to a minimum.Thus, in the example. Fig. 384, during the movement of the wrist-piate through the first and second half of…
Steam-engines
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