Dunkerley, Stanley, 1870- · London, New York [etc.] Longmans, Green · leaf 229
o apply thife method to a few actual mechanisms. § 147. Four-bar Chain.—Let Pi, P2 be the fixed centres of rota-tion, and AB the coupler (Fig. 235). Then, at the instant, A ismoving perpendicularly to PiA, and B to PjB. Draw a line, jpa(Fig. 236), perpendicular to Pi A, to represent the velocity of… … Fig. 230. of B, and ah will represent the velocity of B about A. If PiN bedrawn parallel to PgB to meet BA in N, the triangles pah andPiAN are similar, since corresponding sides are perpendicular toeach other. Hence, the velocity ratio of B to A, which is equal to ^-X^ is also equal to p^, as…
Machinery, Kinematics of
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