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 127
tting the ringinto two half-cylinders, andby insulating these halvesfrom each other and fromthe shaft of the revolving part (see fig. 36) and by setting thebrushes so that they are exactly opposite each other andnever rub against more than one half of the ring, or seg-ment, the alternating current… … Fig. 36, A.
Electrical engineering
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