. Motion picture electricity. i rectifier outfit isshown in Figs. 118 and 119. The alternating currentsupply circuit is connected at A and C, which run to taps2 and 5 on an auto-transformer whose terminals 1 and 7are connected to the anode terminals of a rectifier the lower cathode terminal of the bulb the currentpasses through lead C to the lamp which is connected toD and C, and the circuit is completed through the lead D, MOTION PICTURE ELECTRICITY 223 and the relay to the middle point of the auto the lamp carbons together closes the follow-ing circuit: A. C. t
. Motion picture electricity. i rectifier outfit isshown in Figs. 118 and 119. The alternating currentsupply circuit is connected at A and C, which run to taps2 and 5 on an auto-transformer whose terminals 1 and 7are connected to the anode terminals of a rectifier the lower cathode terminal of the bulb the currentpasses through lead C to the lamp which is connected toD and C, and the circuit is completed through the lead D, MOTION PICTURE ELECTRICITY 223 and the relay to the middle point of the auto the lamp carbons together closes the follow-ing circuit: A. C. terminal C to tap 5, through auto trans-former to tap 4, through lead D to lamp, through lampto terminal C, through contacts of relay to tilting magnet,through tilting magnet to tap on lead A. This excites thetilting magnet and tilts the bulb so the two mercury poolsunite. At the same time the alternating current in thetilting magnet induces a voltage in the small startingwinding wound with it, which causes current to flow be-. Fig. 119 tween the mercury pools as soon as they unite. This cur-rent acts like a short-circuit on the tilting magnet, andthe bulb rights itself, causing a spark which breaks downthe cathode resistance and starts current through the bulbfrom the main anodes. This current flows through therelay coil and opens its contacts which opens the tiltingmagnet circuit. Figs. 120 and 121 show diagrams of connections ofthe 50-ampere outfits, the operations of which are sim-ilar to those of the 30-ampere. 224 MOTION PICTURE ELECTRICITY PffiGRAM Of COA/MeCTtoNS-
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookidmotionpictureele00hall
