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 78
n on the switch structure, particularlyin the larger sizes. An insulating wood section in the control shaft separates the con-trol handle from the remainder of the switch. Discharging horns can be fitted to thistype of switch and when so equipped they have been found capable of breaking… … Fig. 2,215.—Pacific swivel type blade for Baum pole top switches. The twist type of blade,here shown, is especially adapted to switches operating in freezing or sleety weather.It will be seen that the first few degrees through which the rotating insulator is movedhave the effect of twisting the…
Electrical engineering
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