Hallberg, Josef Henrik, 1874- · New York city, The Moving picture world · leaf 60
The core for a transformer may be of many differentshapes. The type which has been previously illustratedis called the core type, having two magnetic legs. … Fig. 24 Fig. 24 illustrates another type also much used, whichis called the shell type transformer. In this design thereare three legs, the middle one is usually of double thecross-section as compared with the two outside legs and 54 MOTION PICTURE ELECTRICITY the primary and secondary coils are…
Motion picture theaters · Electric lighting
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