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- · New York, T. Audel · leaf 236
ghly clean and free from all grit, oil, etc., and the connectionsthemselves be not tightly screwed up, heating will result, and the con-nections may even become unsoldered. HEATING 656 Heating of Brushes, Commutator and Armature.— When heating occurs in these parts, it may be due to any of… … Fig. 727.—Ventilated commutator; sectional view showing air ducts. Air is frequently circu-lated through a commutator in order to maintain it at a sufficiently low temperature,suitable openings being provided for this purpose as shown. Oues. What may be said with respect to excessivecurrent? Ans.…
Electrical engineering
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