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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
- In the kinematic collection of models at Berlin I have shown these for various
mechanisms of this class. R,
K 00
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