Mechanical laboratory methods; a testing of instruments and machines in the mechanical engineering laboratory and in practice (1918)
Smallwood, Julian Chase · New York, D. Van Nostrand company · leaf 101
3) (4) 80 PLANIMETERS 14 Combining (3) and (4) m = ^(r^-ro^), (5) which is the value for the rotation of a point on the circumferenceof the record wheel when the tracing point moves from 4 to 5.Similarly, when it moves from 6 to 7, the motion is The difference between these two motions, m and mi,… … Fig. 51. which is the required relation. The deduction of the relation forthe second case, namely, when thefixed center is within the area to beevaluated, is similar. Under this con-dition, however, the circular componentof the tracing point is always in onedirection. Hence there is no subtrac-tion…
Mechanical engineering laboratories
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