The Encyclopaedia Britannica; ..A dictionary of arts, sciences and general literature . motors havetheir advocates and advantages, it is to the electricmotor that the general public looks for improvedmeans of locomotion. This motor has no powerexcept that which is put into it from an outsidesource, yet it affords such conveniences in the wayof transmission of power, that the minds of manythousands of inventors and engineers are turnedtoward its development. It should be rememberedthat a dynamo or generator and an electric motorare practically the same thing, only reversed in ac-tion. If you dr
The Encyclopaedia Britannica; ..A dictionary of arts, sciences and general literature . motors havetheir advocates and advantages, it is to the electricmotor that the general public looks for improvedmeans of locomotion. This motor has no powerexcept that which is put into it from an outsidesource, yet it affords such conveniences in the wayof transmission of power, that the minds of manythousands of inventors and engineers are turnedtoward its development. It should be rememberedthat a dynamo or generator and an electric motorare practically the same thing, only reversed in ac-tion. If you drive one by belt, or by direct con-nection with a steam-engine, you generate a currentwhich may be conducted out on a wire to do usefulwork, as in lighting or in running motors. If youwould use the same machine as a motor, you simplyconnect the wires with a source of electricity, andrun it the other way, when power is developed, andyou may use it to drive machinery. The annexed diagrams show a very simple formof electric motor, which may assist in a correct un- MOTORS FOR LOCOMOTION. 151 Fig. XI. A—Armature. B—Field-magnet. C—Pulley. D—Pole-piece. E—Brush. F—Commutator. G—Wires con-necting armature-coils with commutator-bars. H—Binding-posts. I—Standard. J—Yoke. K—Base-plate.
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