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Title: |
1895 Article-Edgerton Electric Motor Co., Edgerton Electric Motor |
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Source: |
Modern Mechanism 1895 pg 549 |
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Insert Date: |
9/15/2011 11:16:50 AM |
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An electric motor designed by Mr. N. H. Edgerton is shown in Figs. 34 and 35. The pole pieces, Fig. 35, are arranged each with three radial cores on which the exciting coils are wound, and by which the fields are supported on the interior of a cylindrical iron shell which forms the framework of the motor, as well as the yoke-piece of the field magnets. The shell and pole pieces form a concentrically cylindrical structure, in the interior of which the armature revolves on a central shaft supported at either end by bearings situated centrally in the end caps or lids. These end caps may close the cylinder entirely or not, but usually one end is closed completely, while the other is left open, as shown, for easy access to the brushes and commutator, the armature, shown in section in Fig. 35, is polar, and consists of three helices, wound upon as many radial cores, set at equal distances upon a central prism of the same number of sides. Through the central axis of this prism, the shaft is placed longitudinally, and. as before stated, supported in bearings in the end caps of the motor. The outer or peripheral extremity of each of these cores is segmental in shape, coinciding in curve with the inner concave surfaces of the pole pieces between which it revolves. The helices are wound parallel with the axis of the armature, as in the Siemens shuttle armature, and each is complete in itself. Similar ends of each helical wire are connected with the commutator segments, of which there is one for each helix and the other similar ends are carried out to a common union, insulated from and carried upon the shaft. |
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1895 Edgerton Electric Motor Co., Edgerton Electric Motor
1895 Edgerton Electric Motor Co., Edgerton Electric Motor Section
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