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 107
eel is mounted on the arm asshown. An examination of Figs. 52 and 47 will show that theCoffin planimeter is the same in principle as the polar; themechanical difference being that the arm a of the former is infinitelylong, so that the pivot swings in a right line instead of the arcof a circle. The… … --Record Wheel ^■■^Udincj Pin Fig. 52.Coffin Planimeter. For this purpose the indicator diagram is arranged as shown by Fig. 53, with its left-hand extremity in the line of the guide, and its base perpendicular to the line of the guide. The tracing point of the planimeter is then placed at the…
Mechanical engineering laboratories
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