Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 389
l which it m^oves must have twicethe diameter of the wheel which moves the negative carbon.As long as there are any carbons in the first lamp, the currentpasses into the positive-carbon holder, the positive and negativecarbons, the helix, the joint piece of the armature, and from there 368 THE… … Fig. 216. an extent as to interrupt the circuit, the side armature is releasedfrom the pole piece and is pressed against a contact-strip whichsends the current through the second set of carbons. As soonas the second set of carbons is consumed, the armature of thatlamp is released in the same way,…
Electrical engineering
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