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Title: |
1895 Article-United States Electric Lighting Co., Electric Motor |
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Source: |
Modern Mechanism 1895 pg 552 |
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Insert Date: |
9/16/2011 8:33:02 PM |
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The United States Motor, Fig. 43, is a motor introduced by the United States Electric Lighting Co., and is a departure from the usual shapes of magnetic circuit, the form presented requiring but a single magnetizing coil, and being virtually an inverted horseshoe in shape, with the coils wound around the yoke. The magnetic circle is cast in two pieces, the joint being in the center of the magnetizing coil, and the two portions being held together by the bolts shown in the cut. The mechanical construction is exceedingly simple, as the field magnets form their own base by projections cast solid with them, and similar projections form a support for the bearings of the armature shaft. The switch for controlling the motor is placed directly on top of the pole pieces. The armature presents some peculiarities: it is a toothed drum of rather large diameter, the teeth very numerous and small, so that no trouble is encountered from the heating that usually follows the use of large projections in an armature. This construction accomplishes two ends. In the first place, it reduces the air gap to a very minute amount. In the second place, it simplifies winding the armature, for no special care need be taken in laying off the various sections as the armature is wound: it is simply necessary to take the size of wire used for that particular motor and fill the space between the teeth with it, thus forming an independent segment of the armature. The mechanical advantage secured by this construction is that all the armature wires and bands lie beneath the surface of the armature, and are therefore completely protected from injury. |
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1895 United States Electric Lighting Co., Electric Motor
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