Here's the tag that is on it...Patent is from 1916 but doesn't necessarily mean it's that old. I believe this was run by a AC motor and then produced a DC current for the Carbon Rod Lamp in the projector.The Hertner Electric Company also built motors for electric cars in the early 1900 but the division was bought out by the car company they were put into. They make forklift batteries today under a different name.
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