Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 157
536. VACUUM JET CONDENSER AND ROTARYPUMP.—The jet in the vacuum chamber is regulated bythe valve. The rotary pump, being entirely immersed inthe water below, is water-packed. «o 146 HYDRAULIC POWER AND DEVICES. … 537. RAMELLI ROTARY PUMP.—One of the earliest (1588). A slotted cylinder with fourwings eccentric to a cylindrical shell. The wingsare pushed out by helical springs.
Mechanical movements
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