Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 760
in fig. 481 indica-ted by the figures thereon. The rheostat included two Edison Blamps of 85 ohms each, so that the total resistance when thelever touched the last segment was 174 ohms. The high resistance necessary at starting to cause the magneticfieid of the generator to magnetize itself was… … Fig. 481. the wheel H H to turn on the armature shaft G. This wheelgears with two wheels E E, to which are fastened arms C CD D. These arms carry brush-holders and brushes A^ Ag BjBg. The function of the device is sim^ply to change the relativedirection of the current through the armature of the…
Electrical engineering
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