Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 337
The carbons are brought into contact when thecurrent is turned off; 2. The carbons are separated a proper dis-tance so that an arc may be formed when the current is turnedon; 3. The carbons are fed to the arc as they are consumed; 2,428 HAWKINS ELECTRICITY 4. The circuit is made or broken when the… … PLUNGER CLAMP M0VA6UCARBON FIXED CAR&OK .Fig. 3,337.—Elementary series control arc lamp. The lamp must be so connected that thecurrent flows from the top carbon to the bottom carbon. The solenoid which controls themovement of the upper carbon is in series with the arc. In operation, gravity…
Electrical engineering
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