Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 616
r is steam-jacketed, and is surrounded bya casing O, composed ofbrickwork or other non-conducting material.Steam is first admitted above the piston, driving it rapidly downward and raising the pump-rod. Atan early point in the stroke the admission of steam is checked by the sudden closing of the… … 588 PUMPING ENGINES. where the engine is applied to the pumping of deep mines, by the immensely long and heavy pump-rods. Where this weight is too great, it is counterbalanced; and where, as when used for the water-supply of cities, too small, weights are added. When the stroke is completed, the…
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