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 1119
irs being parallel; 4, 4^ are com-ing into the field of best action; in other words, they areapproaching that part of the field in which there is mostrapid change of magnetic flux, while 2, 2^ are approachingthat part in which the flux is uniform. In 4, 4^ there isan increasing electro-motive force… … Fig. 470 electromotive force in 2, 2^ would be zero, and consequently4, 4^ would be short circuited through 2, 2^. Just beforethis occurs, however, 2, 2^ have passed from under thebrush, and the small current still flowing draws out thespark seen on the commutator of all open coil machines.Setting…
