Page:The Kinematics of Machinery.djvu/450

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428

KINEMATICS OF MACHINERY.

examined. They are similar, so we need only examine one of them, say (C Z C" Z Y '> this is represented in Fig. 281, where a is supposed to be fixed to the stand. The frame c becomes a crank

FIG. 281.

turning about the axis 1, while the wheel b rolls upon a. We have first to determine the relation between the angular motions a/ and a) of the wheel b and the arm c respectively. Imagine the