Grant, George B. (George Barnard), 1849-1917 · Boston, Grant gear works, incorporated · leaf 44
ve. As in Fig. 59, roll a circle of the diameterof the circle of action upon the ouiside of thepitch line for the faces, and upon the insidefor the flanks, and a fixed point in it willtrace the curve. The method can be used by actually con-structing pitch and rolling circles, but thesame result can… … Construction hy rolling Fig, 59. step is not more than one-tenth of the diam-eter of the circle, the error will not be overone-thousandth of an inch for each step. This method is the best one to adopt, ex-cept for the standard tooth. 82.—THE THREE POINT ODONTOGRAPH. It is a simple matter to draw…
Gearing
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