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 178
ion or the electrical effects, theymay be classified as 1. Simple on and off flashers; 2. High speed flashers; 3. Lightning flashers; 866 HAWKINS ELECTRICITY 4. Script breakers; 5. Chaser flashers; 6. Thermo flashers: 7. Carriage calls; 8. Talking signs; 9. Electric clocks. Carbon Flashers.—In this… … Fig. 1,011—Dulls carbon type flasher. This is a main line flasher; that is. it is set into themain wires instead of carn.-ing down each circuit. The circuits are opened and closed oncarbon contacts, reinforced with standard knife switches. The blades are opened and thecurrent broken by gra\-ity…
Electrical engineering
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