Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 217
screw a <i, working into a nut in the foot of tin upper screw-frame, effects the horizontal or traversing movement of the jack, the frame of the lower screw serv-ing as a bed or slide for the latter movement. A ratchet-lever may be used to work either of thescrews instead of a crank. Tlie…
Mechanical engineering -- Dictionaries
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