Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1100
or 106£ 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… … 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…
