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 389
will flicker badly or cease to burn entirely.In such cases the trouble is usually caused by defective carbons. Theonly remedy is to insert a new pair of carbon. The interval of time allowable between two successive trims dependsentirely upon the life of the carbons or other electrodes in the… … \ Fig. 3,408.—Diagram showing the arrangement of essential parts of the Moore vacuum tubelamp. The vacuum tube consists of a continuous glass tube A, 1% inch in diameter,and any desired length up to 200 feet supported near the ceiling by brackets and encirclingthe area to be lighted. This tube is…
Electrical engineering
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