Living pictures; their history, photoproduction and practical workingWith a digest of British patents and annotated bibliography . tor of this type of machine ;there does not appear to have beenF^- 83- any mention before 1893 of the motion used in the Chronophoto-graphe, though, considering the number of instancesin which vague suggestion has been found to have longpreceded practical application, it would probably besomewhat rash to definitely afhrm the statement. In November, 1893, Friese-Greene filed an Englishspecification chiefly re-markable for its resem-blance to Varleys in-vention of 18
Living pictures; their history, photoproduction and practical workingWith a digest of British patents and annotated bibliography . tor of this type of machine ;there does not appear to have beenF^- 83- any mention before 1893 of the motion used in the Chronophoto-graphe, though, considering the number of instancesin which vague suggestion has been found to have longpreceded practical application, it would probably besomewhat rash to definitely afhrm the statement. In November, 1893, Friese-Greene filed an Englishspecification chiefly re-markable for its resem-blance to Varleys in-vention of 1890 (). However, as thedrawing shows thecam-driven arm moreclearly, it is repro-duced in Fig. extraordinarysuggestions were madefor utilising the ap-paratus in the produc-tion of moving stagescenery, a double dis-solving shutter wasshown, and it was saidthat cobalt salts mightbe used to colour films in order to produce change oftint under the influence of warmth; though how thisprinciple affects a kinetographic film (which moves atshort intervals of time and is specially protected fromheat) was not Fig. 84. CHRONO-rROTOGRAPHY. 85 As a curiosity may be mentioned an idea publishedin 1893 in The Optician and Photographic TradesReview. The suggested method of working dependslargely upon the optical properties of the cyclostat, aninstrument for rendering a revolving body opticallystationary by means of a prism rotated in the samedirection as the body under observation, but at halfthe angular speed. If, now, we have a revolvingcircular sensitive surface, we can render it opticallystationary by means of a cyclostat, and can take aphotograph upon it by an exposure of any durationdespite its continual rotation. But if the sensitivesurface is formed of a portion of a flat spiral, lying ona plate through a slot in which it is fed up and with-drawn, this very action causes a rotation. This rotationwill be neutralised as a whole by the cyclostat, butthe portion o
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectmotionpictures
