A handbook on the teeth of gears, their curves, properties and practical construction (1885)
Grant, George B. (George Barnard), 1849-1917 · [Boston] · leaf 6
FIG. 3. THE EPICYCLOIDAL TOOTH. … FIG .4 WHOLE EPICYCLOIDAL TEETH. If a projection be formed on the frictionwheel fig. 4, the curved outline of whichis a whole epicycloid E, and a depressionbe formed in the wheel N having a wholehypocycloid H for its outline, then, if bothcurves have been formed by the samedescribing circle B, it…
Gearing
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-214-129.webp)
