Hallberg, Josef Henrik, 1874- · New York city, The Moving picture world · leaf 141
m/wimm\mw Fig. 75 134 MOTION PICTURE ELECTRICITY Fig. 76 shows almost the duplicate condition of theNernst glower in which the arc between two carbon BALLAST OR STEADYING RESISTANCE … vvwww Fig. 76 points is the equivalent to the glower and the steadyingresistance or ballast is connected in series with the arcthe same as required in the Nernst glower. PRACTICE The subject of the regulating resistance in conjunctionwith the electric arc is so important that in order to…
Motion picture theaters · Electric lighting
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