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 124
m (or that part of the tooth outsidethe pitch circle) shown at I, etc. » JF - ^*-/5» av 11/ »i; 73 i i mt l/B THE MACHINIST AND TOOL MAKERS INSTRUCTOR. 119 Figure 2 represents the single curve gear, and isof 4 pitch (diametral) 13 teeth, and consequently is13-4ths or 3 \^,f diameter on the pitch… … tractor, or what is better, a piece of thin sheet steel cut to anangle of 75° 30, and placing the corner of this template on thepitch line at one of these points as shown, and with one edgein line with the center, measure off on the other side from thecorner of the template a distance equal to…
Machinery
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