Moving Picture News (1911) . lace of the rheostat for moving picturelamps operating on 110 to 120 or 550 volts D C circuits, ef-fecting a saving of fifty per cent, seventy per cent and ninetyper cent respectively. The Hallberg E C Economizer is illustrated in Fig. 4, andconsists of a suitable direct current motor wound for theproper voltage directly connected to a special design andconstructed generator, which furnishes to the moving picturelamp the proper kind of current without the use of a Hallberg D C Economizer is different from any otherdevice ever thought of for this kind o
Moving Picture News (1911) . lace of the rheostat for moving picturelamps operating on 110 to 120 or 550 volts D C circuits, ef-fecting a saving of fifty per cent, seventy per cent and ninetyper cent respectively. The Hallberg E C Economizer is illustrated in Fig. 4, andconsists of a suitable direct current motor wound for theproper voltage directly connected to a special design andconstructed generator, which furnishes to the moving picturelamp the proper kind of current without the use of a Hallberg D C Economizer is different from any otherdevice ever thought of for this kind of work, and on ac-count of its extremely high efficiency, the above great currentsavings can be effected. The Hallberg D C Economizeris made in six different sizes and styles to supply anywherefrom 25 to 45 amperes to the arc of one moving picture lamp. To illustrate the proper method of installing the Hall-berg Direct Current Economizer I call attention to the ac-companying illustration. Fig. 5, which is a reproduction of a.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmotionpictures, booky
