Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 157
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… … <^ 539. EMERY ROTARY PUMP. —Fourwings driven by a hollow cylinder revolving eccen-tric to the outer shell. The inner ends of the wingsare guided concentric with the outer shell by pinsmoving in a slot or groove in the shell heads, andkept in position by a toggle-joint connection.
Mechanical movements
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