Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 384
des. The tube is then raised and anarc is drawn between w and c for half a cycle, which breaks downthe resistance of c long enough to allow the arc to start from band thereby start the rectifier in operation. Art. 390] ELECTRIC LIGHTING 359 389. Mercury Vapor Lamp.—The converter described aboveis… … Fig. 429.—Mercury-vapour lamp for operation by alternating-current. The alternating-current lamp is made in the form shown inFig. 429, which is lettered similarly to Fig. 427. To start the arc,the lamp is tipped so that themercury runs down and forms ametallic connection between thetwo electrodes…
Electrical engineering
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