Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 462
Fifj. 268. When it is desired to switch the light out by hand, all that isrequired is to move the hand switchyj so that it will close con-tact with the knob g. The reverse operation will again re-es-tablish the arc. The precise arrangement of parts in this lampis shown in fig. 267. THE WOOD ARC… … 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
Electrical engineering
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