Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 420
springs, which are seen on the trightand left of the electro-magnet. When they are at rest the car- THE GERAED ARC LAMP. 399 bons are not in contact. Tlie apparatus is worked in this way :Wlien the current passes into the lamp, the carbons are separated,and the current, therefore, can only pass… … Mg. 240. it to descend. The lower armature raises the frame and thelower carbon. As soon as the two carbons are in contact, thearc is formed, and the current which passes into the shunt issensibly weakened. The lower armature is released, and causesthe lower carbon to descend, and thus produces the…
Electrical engineering
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