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 42
tooth which will be correctly driven by a through the arc c g, which is equal to a e. In going frome to b, the pin must drive the tooth to d ; and that the velocity ratio may be constant, the outlinemust be that of the curve b z. It will be observed that, the points a, b being projected to a, b…
Mechanical engineering -- Dictionaries
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