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 1094
106E commutator bars around the open circuity but this methodshould only be used in emergency^ as the sparking will intime destroy the commutator. With many dynamos, especially of older types, it is nec-essary to shift the brushes with every change of load. Thecurrent produced by the armature makes… … Fig. 456showing position of brush for sparklers. CURRENT COLLECTION OF only slightly opposed by those of the armature. In Fig.455 we assume a heavy load on the dynamo and conse-quently the magnetism of the armature opposes that of thefields. This changes the location of the neutral point(when the…
