. Motion picture electricity. l has one beginning end broughtin through terminal No. 1. The end of the primary coilis, however, broken into in three separate places by ter-minal No. 2, which includes a certain number of turns andwhich is the one to be used when the line voltage is No. 3 includes a few more turns and is usedwhen the line voltage is normal. Terminal No. 4 includesstill a few more turns and represents the end of the pri-mary coil, which is used when the line voltage is high. Fig. in illustrates the external appearance of theeconomizer as connected to the line and to
. Motion picture electricity. l has one beginning end broughtin through terminal No. 1. The end of the primary coilis, however, broken into in three separate places by ter-minal No. 2, which includes a certain number of turns andwhich is the one to be used when the line voltage is No. 3 includes a few more turns and is usedwhen the line voltage is normal. Terminal No. 4 includesstill a few more turns and represents the end of the pri-mary coil, which is used when the line voltage is high. Fig. in illustrates the external appearance of theeconomizer as connected to the line and to the lamp of a 196 MOTION PICTURE ELECTRICITY projection machine. The machine switch is always con-nected on the line side of the economizer. The asbestoscovered cables from the lamp are connected directly tothe lamp leads extending from the economizer. This type is regularly furnished for voltages rangingfrom ioo to 120 or from 200 to 220, and may be con-structed for 25, 33, 40, 50, 60 and 120 to 140 cycles. o// APERTUREPLATE. HALLBP Fig 112 On no volts, the economizer line wires are usually at-tached to terminals 1 and 2 for any voltage from 100 to105. On 1 and 3 for no volts, or to terminals 1 and 4if the line voltage should vary between 115 and 210. Ifthe economizer is made for 220 volts, then the line wiresare connected to 1 and 2 for 200 volts; on 1 and 3 for 210volts, or to 1 and 4 for 220 volts (see diagram Fig. 112). MOTION PICTURE ELECTRICITY 197 Some operators desire varying candlepower at the arcto accommodate lighter, or more dense films. In a caseof this kind, it is possible to simply install a 3-pole mainline cut-out (with one single fuse plug) connected to theeconomizer, as illustrated in Fig. 113. By simply putting TO tIHE
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookidmotionpictureele00hall
