Elements of graphic dynamics; an elementary textbook for students of mechanics and engineering (1919)
Andrews, Ewart S. (Ewart Sigmund) · London, Chapman and Hall, Ltd. · leaf 143
ed fixedcentres. Three Virtual Centres in a Straight Line,—If we have threelinks a, h, c, they will have three virtual centres, viz. lai, lac,and l6c; it then follows that these three virtual centres mustbe in a straight line. To prove this, suppose that a, b, c, Fig. 75, are three links,that lai,… … Fig. 75. moves at right angles to P lab, similarly, regarded as a pointin C, P moves about the point lac, and so moves at rightangles to PIoo. The only condition under which P canpossibly move at the same time at right angles to P lab andPlac is that P should lie upon the line lab, lac- If a…
Mechanics, Applied · Dynamics · Graphic methods
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