The machinist and tool maker's instructor, containing an easy method of calculating and laying out difficult work in the machine shop .. (1896)
Genung, Edward. [from old catalog] · New York [Press of J. B. Savage, Cleveland] · leaf 133
om the radial lines, and,with the dividers set with one point at 1 on the base line, andthe other point at F, also on the base line, draw that portionof the tooth between F and 2, then open the dividers, andplacing one leg at 2 on the base circle, and with the pencil at2/ extend the tooth to 37,… … THE MACHINIST AND TOOL. MAKEKS INSTRUCTOR. 129 finish the tooth as shown. It can easily be seen by the draw-ing that a single arc struck from any position will not be aninvolute. The true involute tooth is the best by far for the shapesof gear teeth for most purposes, for the reason that when…
Machinery
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