Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 1255
of counterE. M. F. to cause the proper current to flow. 1220 Steam Engineering ARMATURE TROUBLES. 879. How do armature troubles manifest themselves?Ans. Either by excessive sparking at the commutator, or by abnormal heating of the armature. 880. What are the causes of such troubles? Ans. They may…
