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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3414 Gov't Ex. 277, Decision on Latham Patent. that it is possible to accomplish this end by means of photography." The complainant's expert, Mr. Waterman, asserts, and I see no reason to differ from him, that the apparatus here described can be used equally well for taking pictures and projecting them. It comprises a supply and a take-up reel with an escapement between them having a sprocket Avheel engaging the holes perforated at regular intervals on the two edges of the film to feed it along intermittently across an exposure opening. There is not, however, the distinguishing characteristic of the Latham patent, the second feeding mechanism which continuously maintains a loop and relieves the pressure on the intermittently feeding sprocket. Thomas Armat testifies that the Edison Company began to put out projecting machines in the fall of 189G or the spring of 1897. He says: "These last mentioned machines, however, at this date did not at first embody the feature of providing slack between the supporting reel and the intermittently moving device, and they had a very short life as thus put on the market." The problem I am now considering was solved, not by Edison, but by Latham. The patents to Marcy, though prior in time, do not disclose the Latham invention. The film is pinched between two rollers and is advanced by the revolving of the larger roller, at a uniform rate. There are no sprocket wheels and no holes in the edges of the film to engage such sprockets, the film is moved by friction and therefore lacks the uniform and definite action of the Latham device. The Chinnock camera, assuming it to have been completed and operative prior to the Latham invention, which proposition is disputed and in doubt, does not anticipate for reasons similar to those just above stated regarding the Marcy camera. The film is advanced by continuously driven friction rolls, and is arrested and released by a clamp intermittently operated. There is also a pair of friction rolls below the exposure opening; they are of a