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Title: |
1895 Article-Daft Electric Light Co., Electric Motor |
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Source: |
Modern Mechanism 1895 pgs 540-541 |
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Insert Date: |
8/30/2011 10:32:50 PM |
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To this department of electricity, as well as to the use of motors on railways and streetcar lines, Mr. Leo Daft has paid considerable attention. Fig. 6 shows a Daft motor of the early form. The field magnets are made after what is called the Siemens plan—that is, they lie horizontally, have consequent poles, one above, and the other below, the armature. They are series wound, but the coils of the field magnets arc divided, so that there arc two or more circuits around the core. By suitable devices these are so related that they can be thrown into series or into multiple arc. or into other combinations when there are more than two circuits, for the purpose of changing the strength of the magnetic field, to suit the electromotive force and strength of current supplied to the motors. The armatures are modeled in principle after the Gramme type, but their construction is much improved, especially in respect to the manner of mounting them on their shafts. The latest form of Daft motor is shown in Fig. 6. It will be seen that the field magnets are of the simple horseshoe form, and that the armature is of the Gramme type, as in Mr. Daft's previous models. The machine is designed to deliver normally 5 horse-power, but upon test it has been driven to as high as 11 horse-power without injurious effect. |
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1895 Daft Electric Light Co., Electric Motor
1895 Daft Electric Light Co., Electric Motor
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