Hallberg, Josef Henrik, 1874- · New York city, The Moving picture world · leaf 61
PICTURE ELECTRICITY the primary and secondary coils are mounted on the mid-dle leg as illustrated. Either the core type or shell type transformer givessatisfactory results and there are certain advantagesclaimed for both types. As a matter of fact as far as effi-ciency and regulation is concerned… … V-V r=Sr^\/ni -re ==*» Fig. 25 VOLTS Fig. 26 The constant potential transformer must havethe lowest possible amount of magnetic leakage inorder to maintain the voltage constant irrespectiveof the amount of load on its secondary. In order to reduce the amount of magnetic leak-age, the primary and…
Motion picture theaters · Electric lighting
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