Steam engines, prepared in the Extension division of the University of Wisconsin (1919)
Shealy, Edward Marvin · New York, McGraw-Hill · leaf 116
market, alike inprinciple but differing in details of construction. The one shownin Fig. 68 will be found very convenient for measuring meaneffective pressure from indicator diagrams. This instrumentconsists of two arms AB and CD which are pivoted so they maymove with respect to each other. In… … Fig. 68. final and closer adjustment made by means of the screw G. Thetwo arms of the planimeter are then held at approximately 90°to each other, the point H is placed near the center of the indi-cator diagram, and the point J is pressed firmly into the boardto hold it stationary, the small weight…
Steam-engines
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