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 521
site direction. Part of the lower rack formsa curved slot or yoke, in which works asmall crank Q, on the crank-shaft G. Therotations of the latter consequently impartan alternating and opposite movement tothe racks, so that while the one is goingforward the other moves back, and recipro-cally ;…
Mechanical engineering -- Dictionaries
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