. Motion picture electricity. urns of the primary winding for highestline voltage and a lesser number of turns for medium orvery low line voltage. For further information regard-ing the operation and connection of this device, study thechapter on the Hallberg A. C. Economizer, together withreferences to it under heading Questions and Answersfor Operators. In order to make the value and advantages of this arccontrolling device perfectly clear to the reader, and alsoin order to demonstrate the relative advantages and dis-advantages of setting the carbons at the usual angle asillustrated in Fig.
. Motion picture electricity. urns of the primary winding for highestline voltage and a lesser number of turns for medium orvery low line voltage. For further information regard-ing the operation and connection of this device, study thechapter on the Hallberg A. C. Economizer, together withreferences to it under heading Questions and Answersfor Operators. In order to make the value and advantages of this arccontrolling device perfectly clear to the reader, and alsoin order to demonstrate the relative advantages and dis-advantages of setting the carbons at the usual angle asillustrated in Fig. 100, as compared with the perfectlyvertical carbon setting recommended to the users of theeconomizer, I present photographic reproductions of thearc phenomena and light distribution, which have beenprepared at a considerable expense. The reader who has made a study of the alternatingcurrent electric arc will at once appreciate the extraor-dinary results which can be obtained by the vertical car- 186 MOTION PICTURE ELECTRICITY. ?W:o ^ o C: i-^ ^ co U X>-^ o c no iu cv o 3,-o o 5. ^ rv v- ?II *>.- 3 ? Ex) vj
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookidmotionpictureele00hall
