Experimental engineering and manual for testing (1903)
Carpenter, Rolla C. (Rolla Clinton), 1852-1919 · New York, J. Wiley & sons; [etc., etc.] · leaf 191
a chain to an axis carrying a^veighted pendulum, G^ Fig. 84. The motion of the pendulum is communicated by gearingto a hand, passing over a dial graduated to show the total fric-tion on the rubbing surfaces. The formulae for use of the instrument would be as follows:Let f equal coefficient of… … Section of Boults Lubricant-tester. 202 EXPERIMENTAL ENGINEERING. [§ l6l. attached ; r the radius of the journal; A the projected area ofthe journal; P the total pressure on the journal. Then -.-.(S^ sin Of =fAP,re J ^ from which aGR sin a sin « , . /= rcAP~~^ ~~P~ (^o^stant.) In this instrument…
Building materials · Machinery
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