Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 79
JUST BEFORECOMMUTATION ENDS JUST AFTERCOMMUTATION ENDS then no opposing force, during commutation, to stop and reverse the current in the shortcircuited coil, and when the brush breaks contact with segment 1, as in fig. 308, themomentum of the current in coil F causes it to jump the air gap from…
Electrical engineering
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