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 134
to the mile. 822 HAWKINS ELECTRICITY hard rubber, or various compounds of vegetable or mineralmatter, \\-ith the exception perhaps of mica insulators used onthe feeders of electric railway lines. Glass insulators are generally used on low tension lines, andporcelain insulators on high tension… … Fig. 971.—Clarks antihutn; a de\-ice designed to prevent the humming of telegraph wires. Oues. What is a petticoat insulator? Ans. An insulator which has one, two or three deep flangesor petticoats around the base for the purpose of increasingthe leakage path from the line to the pin. Both glass…
Electrical engineering
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