In the District Court of the United States, for the Eastern District of Pennsylvania, the United States of America, petitioner, vs. Motion Picture Patents Company, et al., defendants (1914)

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3394 Gov't Ex. 277, Decision on Latham Patent. paratus capable of continuously projecting or exhibiting upon a suitable surface a great number of pictures taken from moving objects and arranged upon a strip of film of great length, whereby each picture in the strip is brought to rest at the moment of projection, so that there is given to the eye an impression of objects in motion, in a manner now well understood. "In an apparatus organized so that the picturebearing strip is caused to move continuously and uninterruptedly across the optical axis a light of very high intensity is necessary to give satisfactory results; but a light of such power is not required for satisfactory projection by means of an apparatus embodying the principle of the present invention. The stoppage of each picture during its exposure permits the requisite quantity of light to pass through the condenser, the picture, and the objective to the screen or plane surface upon which the image is projected when the light employed is only of a moderately high power. "The invention therefore consists in an apparatus for projecting successively a large number of pictures of moving objects, embodying, among other things, means for bringing each picture to rest at the moment of projection, means for reducing the strain the picture-film would otherwise suffer from the rapid interruption and renewal of its movement, and means for maintaining uniformity of movement of the film as it unwinds from the delivering reel, and as it winds upon the receiving reel, all as set forth in the claims at the end of this specification." The claims involved are the first, third, fifth, and eighth. They relate to the film-feeding mechanism, and are as follows : "(1) The combination with devices for supporting the bulk of a flexible film before and after exposure, of feeding mechanisms located between the devices for supporting the film and separate and distinct therefrom, one of said feeding mechanisms being constructed to uniformly feed the film and produce a