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 172
by rotating therocker, the machine should be shut down at once, otherwise the com-mutator and brushes are liable to be destroyed, or the armature burntup. This especially refers to high tension machines. Oues. What should be done if the brushes begin tospark excessively ? Ans. First, look at the… … Figs. 681 and 682.—Remedies for leakage of oil from self-oiling bearings. If there be sufficientspace, a metal ring may be attached to the shaft as in fig. 681. With this arrangementthe high speed of the shaft will carry the oil outside of the ring and throw it off in the oilreservoir. Another way…
Electrical engineering
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