The steam engine and turbine; a text-book for engineering colleges (1911)
Heck, Robert Culbertson Hays, 1870- · New York, D. Van Nostrand company · leaf 439
I «£. 9 … 9 £ Fig. 286. — Valve Movement in the Duplex Pump. Although moved by the pistons, the valves are not closely driven,but there is always some lost motion between the rock levers and thevalves. In Fig. 285 this clearance or back-lash is permitted at the nutson the valve rod, on each side of the…
Steam-engines · Steam-turbines
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