Living pictures; their history, photoproduction and practical workingWith a digest of British patents and annotated bibliography . 200 LIVING TICTURES. the other. The result is a slight want of registrationbetween successive views, giving a most annoying,irregular, tremulous motion to the picture whenprojected on the screen. Perhaps the best printingmachine for large-scale work is that devised by It will be seen from Fig. 218 that a sprocket-wheel holds the two films in absolute registration, each. Fig. 218. film passing independently and continuously from onespool to another, but
Living pictures; their history, photoproduction and practical workingWith a digest of British patents and annotated bibliography . 200 LIVING TICTURES. the other. The result is a slight want of registrationbetween successive views, giving a most annoying,irregular, tremulous motion to the picture whenprojected on the screen. Perhaps the best printingmachine for large-scale work is that devised by It will be seen from Fig. 218 that a sprocket-wheel holds the two films in absolute registration, each. Fig. 218. film passing independently and continuously from onespool to another, but held in close contact, negativeuppermost, between two plates under a shieldedincandescent lamp. The exposure is varied, not byaltering the rate of travel, but by the insertion ofvarious slotted cards under the lamp at such a distancefrom the negative that the light is diffused, or rather 201 spread, before reaching it, the quantity of Hght beingregulated by the size of the slot. In addition, as mentioned in the previous chapter, manymachines constructed for use as cameras and projectorsmay also be used for printing. This is notably the casein apparatus fitted with claw mechanism for moving thefilm, the registration then being absolute, while if thenegative and positive bands lie one over the otheron a curved sprocket-wheel there is more tendency W,;y</^/V////Z.
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License: Licensed
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectmotionpictures
