Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 396
THE COLBUBN ARC LAMP.THE COLBUKX ARC LAMP. 375 Fig. 224 is a general view of the Colburn lamp. The posi-tive carbon is fed downward by gravity, and controlled byan electro-magnet. The action of the lamp is very simple.When a current passes through the lamp it magnetizes an … Fig. 224. electro-magnet and draws down an armature. This action tight-ens a clutch on the positive carbon holder rod, and separatesthe carbon about gV of an inch. When the carbons are con-sumed so that the arc is about J-g- of an inch in length, the re- 376 THE ELECTRIC LIGHT. sistance of the arc…
Electrical engineering
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