Page:The Kinematics of Machinery.djvu/354

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KINEMATICS OF MACHINERY.

As either 6 or d may be the driving link its special formula runs (C^-C^for (Cj-G't-fi. It may again be noticed that the links I, c and d are completely identical, as indeed becomes visible in Fig.

260, although in the universal joint they commonly appear so extremely different. We shall shortly have to examine some other very important applications of this chain.

FIG. 264.

FIG. 265.

D. Crossed conic slider-crank chain (C^C- 1 -). The cross- ing of the cylindric slider-chain expresses itself here in the altered length of the links, of which one only, in" Fig. 264 the link d, remains right-angled. We obtain as before four mechanisms (Nos. 18 to 21), of which very few applications occur.