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Opinion on Camera and Film Patent. 153
through the lens, embraces an ordinary adjustable camera * having' the lens end mounted in the side of the box. Two reels, inclosed in suitable cases, are located on opposite sides of the camera lens. The film is drawn from one of the reels on to the other across the lens. It is transparent or translucent, and tapelike in form and is preferably of sufficient width to admit the taking of pictures one inch in diameter between the rows of holes on its edges. These holes are for engagement with the feed wheels for positively advancing the film. When the film is narrow it is not essential to use two rows of perforations and two feed wheels, one of such rows and one feed wheel being sufficient. The two feed wheels are carried by a shaft, and engage the film on one side of the camera opening. The power is supplied by an electric motor which drives a rotating shaft carrying the feed wheels through a pulley held in frictional engagement with the feed-wheel shaft. The take-up reel, or the reel which receives the tape after passing the lens, is also driven from the motor shaft through a pulley which is frictionally mounted upon the reel shaft. The shaft carrying the feed wheels is controlled by a stop or escapement movement which is driven posi 3 tively by another shaft, so that, although the motor tends to drive the feed wheels continuously, they are only permitted to turn with an intermittent motion by the stop or escapement device; the pulley which drives the feed wheels slipping on the feed-wheel shaft while that shaft is held at rest by the stop or escapement device. A shutter consisting of a rotating disk having an opening in it is mounted directly upon the motor shaft, and revolves past the lens, so that the light from the lens is intermittently thrown upon and cut off from the sensitive surface of the film. The camera is shown as a single lens, and is arranged to 4 project the image of the scene being photographed upon the film when the openings of the shutter disk are opposite the aperture between the lens and the film. In operation the apparatus is first charged with a tape film several hundred or even thousands of feet in length. The speeifieation states that the parts are preferably proportioned so that the film is at rest for nine-tenths of the time, in order to give the sensitized film as long an exposure as practicable, and is moving forward one-tenth of the time, and