A descriptive and historical account of hydraulic and other machines for raising water (1850)
Ewbank, Thomas, 1792-1870 · New York, Bangs, Platt, & Co. · leaf 314
igure, are rectangularpieces of stout metal, and are dropped into slits made through the rim ofthe drum, their length being equal to that of the case, and their width tothe distance between its rim and the D piece. They are moved by acrank attached to the drum axle. To lessen the friction and… … No. 137. No. 138. In No. 138 the axis of the drum or smaller cylinder is so placed as tocause its periphery to rub against the inner circumference of the case.Two rectangular pistons, whose length are equal to the internal diame-ter of the case, cross each other at right angles, being notched so as…
Pumping machinery
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