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 98
14 PLANIMETERS 77 fixed center of the instrument is placed within the area, thussecuring a greater reach of the tracing point. (See Fig. 51.)In this case, the readings of the wheel must be interpreted dif-ferently and the constant known as thezero circle must be known. The zerocircle maybe defined… … is placed at its center, and if the tracing point then traverses its circumference, there will be no. motion of the record wheel. It may be seen from Fig. 48 that this condition requires that the plane of the record wheel shall pass through the fixed center, for in this position the wheel will…
Mechanical engineering laboratories
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