Hallberg, Josef Henrik, 1874- · New York city, The Moving picture world · leaf 209
e electric power should fail, or if the out-fit should be installed at a point where the proper kindof alternating current is not available. The construction of the generator is along the mostmodern lines, and the arrangement of the brushes andconnections is similar to the Hallberg D. C.… … bo MOTION PICTURE ELECTRICITY 203 it without injury to the generator—in fact, the currentwill drop down to zero if the carbons are put togetherand held that way for a few moments. This is a point ofadvantage because it protects the machine from shortcircuits or overload, and also permits the…
Motion picture theaters · Electric lighting
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-157-54.webp)
