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 (1913)

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J. L. Carlton, Direct Examination. 777 opening while the film is at rest, the result being the break 1 ing up of the light into shorter periods to assist optical illusion. Q. Is any one of these shutters, or types of shutters essential as compared with the other types? A. Except as relates to the gear ratio of the shutter shaft to the movement of the film. In other words, a shutter with a single tab or wing if revolved twice, to a single movement of the intermittent, would give the same result as a shutter with two wings, revolved once, so it depends on the gear ratio, which shutter is most desirable. Q. I direct your attention to page 24, of the answer of the Motion Picture Patents Company, to the page containing pictures of three shutters, entitled, respectively, "Latham," "Ararat," and "Pross" shutters. Are those types of shutters with which you are familiar? A. Yes. Q. From your knowledge of these appliances, are you able to state whether any one of those particular types is essential to a good projecting machine, that is, one in preference to the others? A. The shutter most essential is the one with a part broad enough to cut off the light during the period of motion. o Mr. Willis: Would you name it, or designate it, as you refer to the diagram, what page of the answer? The Witness: The Latham, there. Mr. Grosvenor: He points out the Latham shutter. The Witness: I didn't point it out — I don't point it 4 out from the point of view as to its proportions. The proportion would be whatever the period of rest is, with relation to the period of motion of the projecting machine. By Mr. Grosvenor: Q. Have you seen this type of Pross shutter used on some projecting machines? A. Yes. Q. Have you seen such projecting machines using the