Hallberg, Josef Henrik, 1874- · New York city, The Moving picture world · leaf 30
s. The watts consumed in a circuit, machine, in-candescent or arc lamps are equal to the currentin amperes times the voltage at the terminalswhere the test is made excepting for alternatingsystems with inductive loads. MOTION PICTURE ELECTRICITY 23 T CHAPTER II Generation of Current HERE are two… … DIRECT CURRENT Direct current, also called continuous current, flowsin one direction only and has al-ways two fixed poles, one calledPositive, designated by ( + ),the other Negative, designatedby (-). Direct current may be producedin several ways, the most commonby means of the electric…
Motion picture theaters · Electric lighting
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