Doc Flashlight

Doc veered right. He had taken a flashlight from an inside pocket.

It was not like other flashlights, that one of Doc's. It employed no battery. A tiny, powerful generator, built into the handle and driven by a stout spring and clockwork, supplied the current. One twist of the flash handle would wind the spring and furnish light current for some minutes. A special receptacle held spare bulbs. There was not much chance of Doc's light playing out.

The flash spiked a white rod of luminance ahead. It picked up a workman's platform of heavy planks.

"The shot came from there!" Doc vouchsafed.

- The Man of Bronze (1933) Chapter 3