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), 1833-1928 · New York : T. Audel & Co. · leaf 384
with a segment of agear attached to the cylinder, and serves to elevate or depress the light. light cover a greater area. This result is obtained by the useof dispersion lenses which disperse or spread out the lightradially as shown in fig. 3,400. ELECTRIC LIGHTING 2,475 Some details of search… … Fig. 3,403.—Carbon feeding mechanism for search light. This is usually motor driven andhence positive in its action. The carbon carriers A, A, are supported on two parallel brassrods B, B, and are moved toward each other by means of a right and left screw. Thisscrew is actuated by the shunt magnet…
Electrical engineering
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