Grant, George B. (George Barnard), 1849-1917 · Boston, Grant gear works, incorporated · leaf 79
lower must be When the driver D turns in the direction I kept in contact by some other force. 76 Spacing the Ellipse. As the two ellipses roll together, the freefoci F^ and F^ will always move at a con-stant distance apart, equal to the distancebetween the fixed foci, and therefore theymay be… … Jtolling ellipses. Fig. 127. 142.—SPACING As the ellipses roll together it is essentialthat the axes come in line, and therefore, ifthe teeth of one gear are fixed at random,those of the other must be fixed to corre-spond. If this requirement is satisfied, itmakes no difference where the teeth…
Gearing
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