. Motion picture electricity. voltage of itssystem in order to accommodate a few users of motionpicture and stereopticon lamps, spot lights, etc., therefore,it becomes necessary for the exhibitor who wishes toeconomize on his electric current bill and to secure thebest results to install a device which will reduce the volt-age from no to that required by the arc for the directcurrent projector lamp. To accomplish this voltage reduction, it is possible to 164 MOTION PICTURE ELECTRICITY install a motor made to operate on whatever the linevoltage may be. This motor should be used for drivingan el
. Motion picture electricity. voltage of itssystem in order to accommodate a few users of motionpicture and stereopticon lamps, spot lights, etc., therefore,it becomes necessary for the exhibitor who wishes toeconomize on his electric current bill and to secure thebest results to install a device which will reduce the volt-age from no to that required by the arc for the directcurrent projector lamp. To accomplish this voltage reduction, it is possible to 164 MOTION PICTURE ELECTRICITY install a motor made to operate on whatever the linevoltage may be. This motor should be used for drivingan electric generator wound for the proper voltage, whichin the case above specified would be about 70 volts. Withsuch motor generator installation changing the line volt-age to 70 volts there will, of course, be required a smallbalast, introducing about 15 to 20 volts potential dropin series with the 70-volt generator and the arc, which isnecessary in order to give proper regulation to the arc,as has been described. 70 VOLTS
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookidmotionpictureele00hall
