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 22
t of CP,measured on the base-circle: on the pitch-circle or on the pitch-line of the rack, it will be JP, foundby drawing ///perpendicular to EA, cutting T Tin J. If 1 be assumed, D L, found by droppingfrom / a perpendicular on T T, must not be greater than half the thickness of a tooth, and… … 2094.
Mechanical engineering -- Dictionaries
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