Practical mechanical drawing and machine design self taught .. (1907)
Westinghouse, Charles. [from old catalog] · Chicago, F. J. Drake & co. · leaf 141
and P^C, ofequal length; while the pin A is coupled to a 138 MECHANICAL DEAWING second fixed center, Pg, by a link, PgA, equal inlength to the distance P1P2 between the two cen-ters, so that when motion takes place, A is con-strained to describe a circular arc passing throughPj. Under these… … positions of the mechanism the points Pj, A, andD are coUinear. Moreover, since the diagonalsAD, BC of the cell bisect each other at right an-gles, PiAxPiD=(PiN—NA) (PiN-f-NA) =PiN2—NA2 =(PiB2—NB2)-^(AB2—NB2) =PiB2—AB2; so that, sipce the links PjB and AB are of con- stant length, it follows that…
Mechanical drawing · Machine design
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