Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 844
a thin slip of wood—say | thick—is provided, and on this an arc of the pitch circle is struck.The slip is then cut to the circumference of the circular arc described upon it. Another similar slip isnow provided, and on this an arc of a circle equal to the diameter of the wheel to the points of… … edge sf is an arc of the pitch circle, is fixing upon B, whose edge is an arc of the extreme circumfer-ence of the wheel, the space s s between those edges being in breadth equal to the length of the teethfrom the pitch circle to the points. The slips are held firmly in their relative position by…
Mechanical engineering
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