Hallberg, Josef Henrik, 1874- · New York city, The Moving picture world · leaf 122
ater is the only element to be considered in con-nection with direct current arc projection. CARBON SETTING The Right Angle Arc.—It would seem, on this ac-count, that a lamp having the crater of the positive car-bon facing the condensing lens would be the most effi-cient, and this is true, provided… … Fig. 62 of what is called the right angle arc lamp, equip their lanterns with right angle lamps with splendid results. Fig. 62 illustrates the relation of the carbons to each other in the right angle arc lamp. You will note the 116 MOTION PICTURE ELECTRICITY positive crater facing the condenser…
Motion picture theaters · Electric lighting
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