Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 491
rt circuits the electro-magnet in themain circuit, whose function is to make the contact piece pro-trude on the outside of the case. Instantly this contact piecemoves back close to the surface of the case again, and the switchis quickly pulled back by its spring. As soon as it again 470 THE… … Fig, 285. extended not only to one, but to several multiple series, and thenumber of lamps compensated for may be regulated quite easily.The objection to this mode of regulation is, that there is noeconomy of energy when only a few of the lights are burning, THE WESTON ARC LAMP. ,. 471 because the…
Electrical engineering
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