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Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in constructive and operative machinery and the mechanical arts, being practically a mechanical dictionary, commencing with a rudimentary description of the early known mechanical powers and detailing the various motions, appliances and inventions used in the mechanical arts to the present time, including a chapter on straight line movements, by Gardner D. Hiscox (1914)

Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 156

An illustration from Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in constructive and operative machinery and the mechanical arts, being practically a mechanical dictionary, commencing with a rudimentary description of the early known mechanical powers and detailing the various motions, appliances and inventions used in the mechanical arts to the present time, including a chapter on straight line movements, by Gardner D. Hiscox, 1914, leaf 156
534. ROTARY PUMP OR MOTOR.— Can be run in either direction. The shell andwing drum are eccentric. The wings are guidedby projections running in a concentric groovein each head. … 535. GARY ROTARY PUMP.—A rotat-ing drum concentric with the outer fixed cylinderand a fixed heart-shaped^cam groove in which thesliding wings are guided. A stop, E, closes thesuction and force side of the chamber. The formof the outer cylinder wall is spiral.

Mechanical movements

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