Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 821
D, is theradius of a wheel of SS teeth of the particular pitch marked against it on the line A B. They alsoexpress the radii of wheels having less than 88 teeth when measured only to the corresponding pointin the line joining B, and the divisional on C D, against which the number of teeth is… … The scale may also be used when the number of teeth exceeds 88 ; for example, to find the radius-o!a wheel having 100 teeth. Thus having found the radius answering to 88 teeth, upon the same paralleltake off the measure answering to the difference 100 — 88 = 12 teeth ; and the two measures…
Mechanical engineering · Mechanics · Engineering
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