Dunkerley, Stanley, 1870- · London, New York [etc.] Longmans, Green · leaf 354
onstant and equal to PiPa. Hence the points C and D may be NON-CIRCULAR WHEELS. 343 connected by a link of invariable length, without in any way con-straining the motion. This enables us to plot the position of onewheel corresponding to a given position of the other; for thepoints C and D describe… … Fig. 377. that of a certain four-bar chain. A photograph of the arrange-ment is shown in Fig. 377, in which one board is fixed and theother rolls round it. The major axis of the rolling ellipse has acertain motion impressed upon it; and that motion is exactly thesame as if the foci were connected…
Machinery, Kinematics of
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