Practical electricity, with questions and answers (1901)
Cleveland armature works, [from old catalog] comp, Lincoln, John C. [from old catalog] · [Cleveland, Ohio, Cleveland armature works] · leaf 228
THOAIPSOX KBCORDING WATT METER. Most of tihe recording mefters in use in this country areof this type. In general, the meter is simply an ordinarymotor, except that it is built without iron, ais shown inFig. 77. Attached to the shaft of this motor is a retardingdis«c, which is made of copper and is… … ^^JIMJE Figure 77 Diagram of connections and operation of Thompsons recording wattmeter. and is connected up to a small commuitator composed ofsilver bars. Two thin silver brushes toucJi this commuta-tor and carry the current to and from the armature. Thetorque on the motor is proportionial to the…
Electricity · Electric generators
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