Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 180
piston rises fromthe bottom of the cylinder B,a vacuum is produced below,and the valve O is kept closedby the atmospheric pressure,while the air in the pipe A, inconsequence of its elasticity,raises the valve S, and part of itpasses mto the cylinder. The air being thus rarefied, waterrises in the… … Fio. 153. 182 Pumps and Hycii aulies. When the piston descends, the valve S closes by its ownweight, and prevents the return of the air from the cylinderinto the tube A. The air compressed by the piston opens thevalve O, and escapes into the atmosphere by the pipe C. Witha second stroke, the same…
Hydraulic machinery · Pumping machinery
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