Experimental engineering and manual for testing. For engineers and for students in engineering laboratories (1906)
Carpenter, Rolla C. (Rolla Clinton), 1852-1919 · New York, J. Wiley & Sons; [etc., etc.] · leaf 71
ecord-wheel travels over a special surface; oneend of the arm travels in a slide, the other end passes aroundthe diagram. 32. Theory of the Coffin Instrument.—This planimetermay be considered a special form of the Amsler, in which thepoint P, see Fig. 14, page 43, moves in a right line instead of… … Fig. 13.—The Coffin Averaging Instrument. and the differential equation of the register becomes dR — ndd s2) Hence, as in equation (7), A = IR (13) §32-] APPARA TUS. 43 That is, the area is equal to the space registered by the record-wheel multiplied by the length of the planimeter arm. This…
Building materials · Machinery
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