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 69
amine the illuminated circle. If the lightbe centered and the lamp correctly adjusted, the circle will be entirely freefrom colorationor shadows. In figs. 3,869 and 3,870, the crater needs to be properly adjusted laterally,it being as shown too far to the right or left; figs. 3,871 and 3,872, show… … Fig. 3,877.—Simplex arc lamp. The carbon holders are furnished to accommodate carbons ofy<z to Y± diameter and 12 upper and 6 lower in length, carrying capacity 75 amperes.There are eight adjustments, six being accessible from the back of the lamp house; andtwo, to alter the angle of the carbon,…
Electrical engineering
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