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 818
In Fig. 2007 the apices of the two cones meet in a point, so that one of them becomes a plane sur-face ; its teeth therefore become radial as referred to its apex; in other words, they diverge in themanner of radii, drawn from the centre a. The change in the direction of the motion is in this…
Mechanical engineering
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