Mechanical movements, powers, devices and appliances (1901)
Hiscox, Gardner Dexter, 1822?-1908 · New York, N. W. Henley & company · leaf 155
537. RAMELLI ROTARY PUMP.—One ofthe earliest (1588). A slotted cylinder with fourwings eccentric to a cylindrical shell. The wingsare pushed out by helical springs. … 538. HEPPEL ROTARY PUMP. —Fourwings are jointed concentric with the cylindrical^ shell. A disc and shaft are set eccentric to thecylindrical shell. The wings are linked to theeccentric disc as shown, so that the wings on theupward stroke move faster than the wings movingdownward on the opposite…
Mechanical movements
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