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 1127
s thearm back. In the meantime^ rock the brushes forward orbackward and keep the sparK about the proper lengthysay % in.^ at full load to % in.^ on short circuit. Gradu-ally the rheostat arm will settle^ the spark will become con-stant^ and the machine will give its proper current. Thenclamp the… … Fig. 476 care of the machine from the start. By allowing thecontroller to start the machine, a trifle longer spark is ob-tained than by the other method, unless the machine is runfrom the beginning on a very full load. The machine will require a trifle longer spark on lightload, or on bad circuits,…
