GB195630A - A method or process of and means for removing the flickering or dancing during the projection or reproduction of kinematographic pictures or scenes in natural colours - Google Patents

Abstract

195,630. Chromo Film Ges. March 28, 1922, [Convention date]. Colour kinematography; three-colour and like systems.-To reduce flickering in threecolour projection, the rate at which the successive colour changes follow each other on the screen is increased, without increasing the speed of the film, by enlarging the gate A, B so that it accommodates two successive colour records R, G on the film and arranging a system of reflectors P1, P2, P3 in front of the gate to project the beams from the two records into superposition on the screen. The light passes through a rotary shutter K having two concentric series of coloured apertures, Fig. 3, one series being appropriate to each of the projection beams, and the apertures being so arranged that the images of the two records which are in the gate at the same time, follow each other in rapid succession on the screen. The film is moved at each shift through the height of a single picture, so that each colour record is projected twice. The reflectors may be arranged, as shown in Fig. 1, or that the two beams pass through a single lens L, or they may be arranged to separate the beams which are then passed through separate lenses. The Specification, as open to inspection under Sect. 91 (3) (a) also describes a modified arrangement in which the negatives are taken through a shutter of the form shown in Fig. 4 (Cancelled) having three apertures, in each of which two of the primary colours are arranged in juxtaposition, each area on the film being exposed through one of the composite apertures. The colour areas on the shutter are provided with adjustable covers a so that they may be adjusted in accordance with the colour-sensitiveness of the film. The positives are projected through a similar shutter, the gate being of the ordinarv size, and a single-picture film-shift being employed. This subject-matter does not appear in the Specification as accepted.