File:The conquest of nature (1911) (14763184401).jpg

Identifier: conquestofnature00will (find matches)
Title: The conquest of nature
Year: 1911 (1910s)
Authors: Williams, Henry Smith, 1863- Williams, Edward Huntington, 1868-1944, joint author
Subjects: Industrial arts Machinery
Publisher: New York and London, The Goodhue company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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ch, by being conducted through the armature,has produced the striking effect we have just witnessed.This current reaches the car through an overhead orunderground wire. All that is essential is that some con-ducting medium, such as an iron rail, or a copper wire,shall form an unbroken connection between the motorapparatus and the central dynamo where the power isgenerated—the return circuit being made either byanother wire or by the ordinary rails. The central dynamo in question will be found, if wevisit the power-house, to be a ponderous affair, sugges-tive to the untechnical mind of impenetrable mysteries.Yet in reality it is a device essentially the same in con-struction as the motor which drives the train. Thatis to say, its unit of construction consists of a wire-wound armature revolving on an axis and fitted betweenthe poles of an electromagnet. Here, however, thesequence of phenomena is reversed, for the armature,instead of receiving a current of electricity, is made to (174)
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Lower figure copyrighted by N. Y. Edison Co. AN ELECTRIC TRAIN AND THE DYNAMO THAT PROPELS IT. The lower figure gives an interior view of a power house of the ManhattanElevated Railway Company. The upper figure shows one of the electric enginesoperating on the New York Central Lines just outside of New York. The poweris conveyed to the engine by a third rail clearly shown in the picture. MANS CO-LABORER: THE DYNAMO revolve by a belt adjusted to its axis and driven by asteam engine. The wire coils of the armature thus madeto revolve cut across the so-called lines of magneticforce which connect the two poles of the magnet, andin so doing generate a current of induced electricity,which flows away to reach in due course the third railor the trolley-wire, and ultimately to propel the motor.It is hardly necessary to state that in actual practicethis generating dynamo is a complex structure. Thearmature is a complex series of coils of wire; the elec-tromagnets surrounding the armature are se

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