Living pictures; their history, photoproduction and practical workingWith a digest of British patents and annotated bibliography . Fig. 220. to variable strain and consequent irregularity. Forinstance, Fig. 219 shows Lumieres Cinematographeprinting positives on a film, R, which passes into alight-tight box, being clawed down picture by picturein contact with the negative band, which passes throughthe machine by the usual channels. Another arrange-ment for use with the Demeny Chrcnophotographe isshown in Fig. 220. The films are passed through themachine at a regular rate by means of the sprocke
Living pictures; their history, photoproduction and practical workingWith a digest of British patents and annotated bibliography . Fig. 220. to variable strain and consequent irregularity. Forinstance, Fig. 219 shows Lumieres Cinematographeprinting positives on a film, R, which passes into alight-tight box, being clawed down picture by picturein contact with the negative band, which passes throughthe machine by the usual channels. Another arrange-ment for use with the Demeny Chrcnophotographe isshown in Fig. 220. The films are passed through themachine at a regular rate by means of the sprocket- 202 LIVING Fig. 221. wheel, the dog being removed. A plate pierced with a narrow slot is substituted for the shutter, and exposure takes place at this aperture, the two films passing into a light-tight compartmentin the base. employs acontinuous - travelprinter, of whichFig. 221 is a ver-tical section. Thenegative passes fromspool Q to spool S, the positive film travelling from P to R. Both take-up spools are driven at the same rate by chain-gear, and the two films, negative undermost, are pressed in close contact with a shelf over which they pass, and through an aperture in which light is thrown by an inclined mirror, A. M. Joly suggests bringing the two films from their spools over small rollers, E (Fig. 222), through an in-clined guide, F, and exposing them to the action of light from an incandescent lamp as they pass in front of a narrow aperture and over a sprocketed roller, by which they are both driven. For printing special positives for alternate projection the film and negative
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectmotionpictures
