Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1079
Four Pole,Four Circult.Ciuss ConnectedTwo Brushes or Four Brushes,laMultlDle. 0 ^ -P Four Pole.Two Circuit Rlug Two Bruslies or Four Brushes, !u Multiple. Fig. 444 SHOWING THE NUMBER AND POSITION OF BRUSHES ON DIFFERENTARMATURE WINDINGS The black brushes are the ones actuaHy used, the dotted…
