Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 250
Fig. 18. Fk,. 19. Three-armature dynamolors. the field is somewhat analogous to the swing of the field ofa dynamo when mounted in the form of the Hrackett cradledynamometer. Within certain limits the angular deflectionis a measure of the torque.* Hrackett states that if the coun-terbalancing effort…
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