Practical mechanical drawing and machine design self taught .. (1907)
Westinghouse, Charles. [from old catalog] · Chicago, F. J. Drake & co. · leaf 141
PiB2—NB2)-^(AB2—NB2) =PiB2—AB2; so that, sipce the links PjB and AB are of con- stant length, it follows that in all positions of themechanism the product PiAxPiD is constant. Now let the circle described by A meet the lineof centers in E, and draw DF perpendicular to theline of centers. Since the… … P2A, and is constant; hence in all positions of themechanism the distance P^F is constant, fromwhich it follows that the locus of D is the line DF.In Fig. 212, the center Pj lies outside the rhom-bus; but it might equally well lie inside it, asshown in Fig. 213. Precisely the same argumentis…
Mechanical drawing · Machine design
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