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 190
cost of the sign. The border, although working continuously consumes very littl<current. Oues. What is the relative cost of a one snake sign ascompared with a two snake sign? Ans. One snake running around the border would cost twiceas much for flasher and wiring as a two snake flasher. Three… … Fig. 1,029.—Thermo flasher. It consists of two metal strips, one of brass and the other of iron,about 5x } 2 X jV each. The brass strip is prov-ided with a winding of fine wire overasbestos and the two strips are connected to the base as shown. One terminal of thewinding is connected to J, and the…
Electrical engineering
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