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 15
o drive,and the one with flanks only ought always to be the follower. But in many cases a wheel must beturned by another, and also drive a third. And besides, it is to be noted that the longer the faceof the tooth, the greater is the angle between the line of action PA, Fig. 2073, and the…
Mechanical engineering -- Dictionaries
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