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 106
motion of a point on the wheelcircumference with relation to its axis will be due only .to circum-ferential motion of the tracing point. Radial motion of the 16 PLANIMETERS 89 tracing point will cause no motion of the wheel on its axis. Thusit is seen that it is only the circumferential component… … Base Circle Fig. 54.—Radial Planimeter. To deduce the equation of the instrument, let R = average distance of tracing point to pivot center = average radius of curve, inches;r = distance between tracing point and plane of wheel, inches;ro = distance between center of chart and zero of circular…
Mechanical engineering
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