Page:The Kinematics of Machinery.djvu/583

 HIGHER PAIRS IN MECHANISMS.

�561

�centroids of a and c become somewhat complicated, we cannot here examine them.* This curve-triangle train has also sometimes been

��FIG. 410.

�employed in practice unreduced ; I know of one case, at least, in which the pair 2 has been used complete. Fig. 411 shows this

���FIG. 411.

�FIG. 412.

�mechanism in our schematic form and with the addition of our symbols; its formula is (CW,<7"P- L )!r. It is used for driving the

mechanisms of this class. R,
 * In the kinematic collection of models at Berlin I have shown these for various

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