Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 463
Fig. 269. 442 THE ELECTRIC LIGHT. The marine projector, fig. 269, is used in connection with thefocusing lamp in cases where it is desired to throw the light indifierent directions, and is designed for use on vessels navigating … Fig. 270. rivers, lakes and harbors. It is provided with a hand wheelwhich engages into a sector or worm-wheel, by the use of which THE WOOD ABC LAMP. 443 the light is thrown up or down, or retained in any position de-sired. It also swings on a bolt in the centre of the uprights, soas to throw the…
Electrical engineering
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