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 18
the figure, by taking the describing circle of proper diameter, to make the acting faces A B, A G ofvery nearly equal length. When this can be done, it is an advantage, as the wear of the two sur-faces will then be the same. In laying out annular gearing, when the internal wheel is large, care must…
Mechanical engineering -- Dictionaries
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