A course of experiments in physical measurement (1897)
Whiting, Harold, d. 1895 · Boston, D.C. Heath and Co. · leaf 417
has to overcome, the speedof the motor is reduced to about half its maximumspeed. To obtain the maximum efficiency, the speedof the motor must be still furtherreduced. ^ 175. The Transmission Dynamometer. — To meas-ure the power of a motor actually doing useful work,a transmission dynamometer must… … Fig. 189. Ijalanees (a arid J) as in Fig. 187, these cords aremade to pass around two pullej^s (a and h, Fig. 189)to a second wheel (A), to which the motion is thustransmitted. The pulleys are suspended by twospring balances (J. and B). Thework done hj the motor dependsas before upon the difference…
Physics
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