Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 413
ver its surface. The rota-tion of the armature causes the carbons to move by the actionof a right and left screw on the two nuts B, C, which serve ascarbon-holders. The screw D is used to raise or lower the lu- 392 THE ELECTKIC LIGHT. ininous point. The current passes from the positive pole of… … Fig. 237. the arc, excites the electro-magnet E ; and finally a third, which,without passing across the arc, excites the electro-magnet of finewire, E, but in such a manner that its action on the spring iscontrary in direction to that of E. THE GRAMME LAMP, 393 As a result of this arrangement, with…
Electrical engineering
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