Steam engines, a thorough and practical presentation of modern steam engine practice (1920)
Ludy, Llewellyn V., 1875-, American Technical Society · Chicago, American technical society · leaf 19
Pig. 2. Pulsometer 4 STEAM ENGINES around the piston, or air from leaking In where steam was beingcondensed, it was customary to keep a jet of water playing on thetop of the piston. One great trouble with all of these engines was that some onewas required to open and close the cocks, and boys were… … Fig. 3. Newcomens Stea-m Pumping Engine overhead, and this did the work for him. By making the valves inthis way automatic, made it possible to dispense with the servicesof the boy and at the same time greatly increase the speed of theengine. The Newcomen engine was iniproved slightly from time…
Steam-engines
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