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 848
us A 3 th<; circle p q, dottedin Fig. 2055, and falling within the pitch circle; this will be the locus of the centres of the teeth. Thushaving divided the pitch circle into arcs corresponding to the pitch of the teeth, take the constant radius3 T in the compasses, and keeping one point in the… … The sides of teeth thus formed, consisting each of a single arc, bear considerable analogy to involuteteeth, and like these have the fault of acting together with rather too much obliquity; but the mode ofdescribing them is exceedingly simple, and they have this advantage, that they will work…
Mechanical engineering
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