Motography (Apr-Dec 1911)

April, 1911. MOTOGRAPHY 21 the full illumination, the position of the light source Y being changed with each change in the focus. The colors employed are the three primary colors, red, yellow, and blue, the red screen S, being located in the center or middle compartment B, with the complemental yellow and blue screens, S', and S2, on either side thereof or respectively in the compartments A, and C. In my practical investigation of this subject, I have found that it is essential that the red rays should be transmitted and projected without deviation from the source, because of the jFMg.3. 973,961. much lower rate of wave-vibration of the red compared with the wave-vibrations of the other colors employed. The blue and yellow or green rays which have a higher rate of vibration and greater persistence may be diverged out of the original path from the source of light and then projected by the transmitting lens without material loss of light intensity. That is, by transmitting the red color of slower vibration directly through the central lens and reflecting the other two colors having higher rates of vibration, and which are more nearly alike in wave vibration, I am enabled to secure a nearly perfect synthesis of colors. The prisms transmit the light rays passing through their respective color screens and diverge them in a manner to bring them into axial alinement with the lenses L' and L2. They also serve to restore the position of the images and secure absolute correspondence in the fields of all the lenses. The reflecting prisms which are employed to diverge the rays of the two outside colors are placed intermediate the picture film and the lenses and closely adjacent the film in order that they may receive the fullest illumination from the light issuing from the condensing lens, the intensity of the light diminishing with the square of the distance. The prisms receive the incident parallel rays extending across the entire image of the film. The light rays are then focused in the lens and project a sharp and distinct image directly upon the screen with the full illumination of the lens. Traveling vertically between the prisms and color screens is the tape or film, which as indicated in Fig. 3, has disposed transversely thereof three photographic records F, F', F2, of each pose of the scene depicted, which three records are side by side and are repeated along the length of the film in succssive poses. The film and the special camera for taking the views, are, as before stated, the subjects of other applications of mine. For the present application it will be sufficient to say that the film is a triple view film, but the views are all integral so far as the body of the film is concerned, that is to say the film is three times the width of the usual film and has three views, made in accordance with the well known three-color process, of each pose, in a transverse plane thereof, the three views being repeated in unlimited succession in depicting the complete scene of the moving picture. As shown in Fig. 1, each view or image has its proper color screen and the several images fall on the display screen or curtain M, in perfect coincidence to form a single composite picture in which the natural colors appear in accordance with the well known three-color process. To impart the necessary movement to the film it is carried on a spool or reel D, as seen in Fig. 2, and after passing the shutter is received on another reel or spool below. Intermittent motion is provided so as to hold the three images the longest possible time in the line of projection, and for this purpose any well known means may be employed. The claims allowed by the patent office examiner upon the application for this patent were, very much restricted by reason of work done in Great Britain along the general line of color photograhpy. The claims of patent No. 973,961 are : 1. The art of displaying motion pictures in natural colors, which consists in projecting from a single film through complemental color screens a plurality of photographic records or images, diverging in opposite directions the light rays of the two colors having the higher wave-vibrations, maintaining equal focal distances in the paths of the several light rays, and projecting the rays of the three colors through optical media directly upon a screen or curtain. 2. The art of displaying motion pictures in natural colors, which consists in superimposing on an identical field photographic records or images in the three primary colors, said images being projected from a film having a series of like views extending transversely thereof with the red rays in the center, the light rays from the other two colors being diverged from their original paths in opposite directions, and the rays of the three colors, having paths of equal focal distance, and being projected directly upon a curtain or screen through optical .media. 3. The art of displaying motion pictures in natural colors, which consists in forming on a single film a plurality of transversely ranging views of each pose of the picture and projecting them synchronously and co-extensively through their proper corresponding color screens in equal focal relations and directly through an optic medium upon an identical field. 4. The art of exhibiting motion pictures in natural col-' ors, which consists in forming three like images of each pose of the object or scene to be reproduced, and projecting them through complemental color screens with the red rays in the center, diverging the rays of the other two colors in opposite directions, and then converging them in a manner ^ JO -ff 0 \7 to coincide with the said red rays upon a screen while maintaining equal focal distances in the paths of three colors, and projecting the rays of the three colors directly upon the screen through optical media. 5. The art of exhibiting motion pictures in_ natural col^ ors, which consists in forming in transverse alinement and in the three primary color values three like images of each pose of the object or scene to be reproduced, and projecting them through complemental color screens with the red rays in the middle, diverging the rays of the other two colors in