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 16
just equal to that radius, that wheel will have teeth with radial flanks; but these may be materiallystrengthened by joining them to the bottoms of the clearing spaces by circular arcs, as in Fig. 2079 ;which indeed can be done in any case, as the depth of the space is considerably greater than…
Mechanical engineering -- Dictionaries
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