International Library of Technology · Scranton, International Textbook Co. · leaf 98
, just as the reaction of the currentin the armature of an ordinary dynamo retards the engine.This retarding action of the disk can be adjusted by swing-ing the poles of the magnets in or out from the periphery. 84 ELECTRIC TRANSMISSION, 14 The speed with which the meter runs is thus made… … Fig. 38. The number of watt-hours used during a given time isobtained by taking readings from the dials at the top of themeter in much the same way as a gas meter is read. Onsome meters, the reading as taken from the dial has to bemultiplied by a constant in order to give the watt-hours.This…
Electrical engineering
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