Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 137
The horizontal screw a a, working into a niit in the foot of tUe upper scicw-frame, eftects tlie horuon-tal or traversing movement of tbe jack, tlie frame of tile lower screw serving as a bed or slide for ihalatter movement. A ratchet-lever may he used to work either of the screws instead of a…
Mechanical engineering · Mechanics · Engineering
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