International photographer (Jan-Dec 1941)

PHTfJTS By ROBERT W. FULWIDER, Patent Attorney, Los Angeles No. 2,248,056 — Film Processing System. Jesse M. Blaney, Springdale, Conn., assignor to the Gov't of the U.S.A., as represented by the Secy of War. Application May 19, 1939. 3 claims. A film treating device in which the film is passed through a solution while jets of liquid are directed onto the film to scrub it and overcome frictional drag. No. 2,248,904 — Process of Copying Lenticular Films. John Eggert and Gerd Heymer, Germany, assignors to I. G. Farbenin dust rie Aktiengesel lschaf t, Frankfort-on-the-Main, Germany. Application June 18, 1937. Germany June 25, 1936. 2 claims. A method of copying lenticular film in which the central rays of the copying light are partially absorbed by a filter to compensate for the darkening of the edge of the field which occurred when the picture was taken. No. 2,249,033 — Apparatus for Printing Motion Picture Films. Frederick T. O'Grady, Flushing, N. Y. Original application November 1, 1937, now Patent No. 2,207,103, dated July 9, 1940. Divided and this application June 8, 1940. 2 claims. A projection printer for motion picture films in which the negative may be moved along the optical axis a distance equal to the thickness of the film to compensate for the emulsion being on the front face or the rear face of the film. No. 2,249,061 Projection Device. Harry H. Styll, Southbridge, Mass. Application Sept. 20, 1937. 2 claims. A projection filter which has a light polarizing filter which is damaged by heat, and an infra-red retarding filter spaced from the polarizing filter and between the latter and the light source. No. 2,249,541 — Production of Natural Color Photographs by Intermediate Dye Coupling. Karl Schinzel, Czechoslovakia, assignor to Eastman Kodak Company. Application Dec. 2, 1937, in Austria Dec. 3, 1936. 9 claims. A method of forming a colored photograph by incorporating a coupling derivative in an emulsion, forming a dye by the action of the developer removing the undeveloped coupling derivative, and regenerating the original vat dye in the emulsion. No. 2,249,542 — Reiialogenation Process of Color Photography. Karl Schinzel, Switzerland, assignor to Eastman Kodak Company. Original application July 3, 1937. Divided and this application Dec. 5, 1940. In Austria July 7, 1936. 5 claims. A method of producing color photographs by developing the latent image in a developer which does not affect the color formers, removing the undeveloped silver halide, converting the silver images into silver salt images capable of re-development, and developing them with a color forming developer. No. 2,249,606 — Stereophonic Sound Recording System. Reginald T. Friebus, assignor to Electrical Research Products, Inc. Application March 22, 1938. 8 claims. A method of making stereophonic sound records by picking up sound close to the source, picking up sound at a distance from the source, mixing the sounds in different proportions, and separately recording the different proportions of the mixed sounds. No. 2,249,975 — Apparatus for Indicating the Amplitude of the Sound Record Made by a Sound-Film Cinematograph Camera. Hans Friedrich Nissen, Germany, assignor to General Aniline & Film Corporation. Application October 14, 1938. In Germany October 25, 1937. I claim. A device in which a portion of the sound recording light of a variable area sound and picture recording camera is reflected into the view finder, the amplitude of the sound determining its color in the view finder. No. 2,251,177 — Optical System for Photography and Projection. Richard Thomas, assignor to Thomascolor Corporation. Application July 25, 1939. 6 claims. A beam splitter making use of two glass half-cylinders, each of whose ends are parallel but oblique to the axis of the halfcylinder, the half-cylinders being placed so that their axes coincide and their ends form angles less than 180 degrees. No. 2,251,232— Method and Apparatus for Developing Film. Herbert W. Houston, assignor to The Houston Corporation, Los Angeles, California. Application Nov. 7, 1938. 9 claims. Apparatus for developing film comprising, in combination: a tank containing developing solution; a developing chamber filled with gas inert to said developing solution; and means for moving said film first through said developing solution and then through said developing chamber. TRADEWINDS (Continued from \mge 23) Full Color Prints from Kodachrome Transparencies In 1936 Kodak first announced Kodachrome for miniature cameras in 35 mm. and Bantam sizes. Since then inexpensive color prints from these Kodachrome transparencies have been the dream of thousands of camera addicts. With the announcement of Kodak Minicolor Prints from miniature Kodachrome transparencies hy the Eastman Kodak Company, at the National Photographic Convention in Chicago, the camera fans' dream has been realized. Kodak Minicolor Prints are enlarged from either 35 mm. or Bantam size Kodachrome transparencies by a standardized process in the Kodak Laboratories in Rochester. They are made only from Kodachromes in 2 x 2-inch mounts with the standard central openings. Enlargements are available in two sizes. The "2X" size is about 2% x 3J/4 inches. On these the corners are rounded and there are no margins. The larger size "5X" affords a print 5% x 7-4/5 inches, and prints are returned in mounts — for horizontals 8% x WA inches and for verticals 8% x 10-9/16 inches; the picture opening, or area, measuring 5 x 7V> inches. The quality of the Minicolor print naturally depends on the quality of the Kodachrome transparency from which it is made. A good, properly exposed transparency which will project well, should yield a good color print. Kodak Minicolor Prints contain dyes which, in common with those used in printers' inks and artists' paints, and other similar materials may, in time, according to the Eastman Kodak Company, change. These prints, therefore, will not be replaced or otherwise warranted against any change in color. The dyes used in Kodak Minicolor Prints are stated by Eastman Kodak Company to be as stable as possible consistent with their other requirements. It is important that the prints should not be exposed for long to direct sunlight. When they are used for display they should be shielded from the direct rays of the sun. The "feel" of a Kodak Minicolor Print, particularly in the smaller size, is that of an unusually fine playing card, strong, attractive, and resilient. The print support, or base, however, is not paper or card, but pigmented cellulose acetate. It cannot be expected that Minicolor Prints will supplant the projected Kodachrome transparencies, but this new offering of Kodak bridges a gap that will be well traveled in the future because there are endless uses for these color prints. The "2X," 2% x 3% inch Minicolor prints are seventy-five cents each, and the larger "5X, $3.50, including mounts. Kodak Minicolor Prints will be available through dealers in September. New Color Process Announced by Eastman For decades photographers, scientists, and research men have sought a simplified, direct method of full-color photography. With the introduction in 1935 of Kodachrome Film for amateur movies, there was one step forward in simplified color photography. This was followed in 1936 by Kodachrome for miniature cameras in 35 mm. and Bantam sizes, and in 1938 Kodachrome Professional Film ranging in size from 2% x 3% up to 11 x 14. These materials popularized color reproduction, and the public became color conscious in all its forms. Only one thing was lacking — a simple and practical method of making color prints, but today that gap has been bridged. With the introduction of a new color print process — Kotavachrome Professional Prints at the National Photographic Convention in Chicago — Kodak steps still further in the lead in photographic and color research and development. Kotavachrome Professional Prints are reproduced from Kodachrome Professional Film Trans 24