Mechanical laboratory methods; the testing of instruments and machines in the mechanical engineering laboratory and in practice (1922)
Smallwood, Julian Chase · New York, D. Van Nostrand company · leaf 96
14 PLANIMETERS 79 See Fig. 50. The record wheel moves from 2 to 2 when thetracing point passes from 4 to 5. The rectangular componentof the motion, 2-2, causing rotation of the wheel, is representedby the line m, perpendicular to the wheel axis, m is therefore … Fig. 50. the distance moved through by any point on the record wheelcircumference relative to its axis. From 1-2-3,From 1-2-4,Subtracting, From which,From (1), m = XdK sin (A -90°)= — X cos AdK . . (3) a* -b2 + Z2-26Xcos A. r2=(b+c)2+X2-2(b+c)X cos A.+2cXcosA. XcosA= -^(a2+c2+26c-r2). = ^c(ro2-r2)…
Mechanical engineering
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