International Library of Technology · Scranton, International Textbook Co. · leaf 157
the armaturesin the same direction. ELECTRIC RAILWAYS. 21 3. Car ■Wattmeter,—Recording wattmeters are alsomade in portable form for use in connection with railway-work. Tney are very useful for making tests on the powerconsumption of cars. Fig. 2 shows a Thomson recordingwattmeter as adapted for… … Fig. 2. stronger field than where no iron is used, thus giving alarger twisting action on the armature, so that jarring isnot so liable to interfere with the accuracy of the meter.B, B are the damping magnets used to control the speedand C is the armature. The current coils D, D are con-nected…
Electrical engineering
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