Henry and Hora's modern electricity; a practical working encyclopedia (1915)
Henry, James. [from old catalog], Hora, Karel Jan, 1881- [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 137
st constructed armatures of large diameters,so as to cut a great number of lines of force at low speed, andfinally, they multiplied the number of poles from two to four, eight, twelve, etc.The two, four, six,eight (or more)couples of poles(jVand 5) are allset in one heavyyoke surroundingthe… … Fig. 42. ELECTRICAL ENGINEERING 137 the two neighboring TV poles. These machines are called mul-tipolar in distinction from two-pole, or bipolar dynamos.(Fig. 42 represents an 8-pole dynamo.) As a rule, the numberof brushes is equal to the number of poles, but by makingproper cross connections…
Electrical engineering
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