International photographer (Jan-Dec 1941)

P fl T € n T s By ROBERT W. FULWIDER Patent Attorney, Los Angeles No. 2,232,827 — Film Fire Screen for Motion Picture Apparatus. Nicholas A. Nicholson, Johnstown, Pa. Appln. April 18, 1939. 4 claims. A device for projectors in which the action of the film strip passing through the machine operates the dowser. No. 2,233,010 — Lichttight Packing for Photographic Film. Kurt Hipke and Alfred Miller, Germany, assignors to General Aniline & Film Corp. Appln. Feb. 28, 1939. In Germany March 1, 1938. 4 claims. A light-sensitive photographic roll film provided with means for preventing the reflection of creeping light in connection with said film, said means comprising a roughened surface extending across an end of the film. No. 2,233,284— Film Drive Starting Apparatus. Milford E. Collins, assignor to Radio Corporation of America. Appln. April 23, 1938. 9 claims. A device for decreasing the starting time of film drive apparatus, making use of a magnetic drive which has the magnetic connection strengthened while the motor is accelerating. No. 2,233,771 Motion Picture Machine. Pierino Edward Comi, Wollaston, Mass. Appln. Aug. 2, 1938. 7 claims. A motion picture projector which has a series of rollers located between the picture projection head and the sound head, these rollers bearing on the edge of the film to prevent its vibrating. No. 2,233,809 — Cinematographic Apparatus. John. R. Darby, assignor to Technicolor Motion Picture Corp. Appln. Jan. 31, 1939. 2 claims. A device for printing border lines on motion picture film, and using an endless opaque film with transparent lines corresponding to the border lines which is passed around a housing having a light in it, with a picture film superpositioned on the endless film. No. 2,233,839— Moving Picture Projecting Machine. Antoine Heurtier, SaintEtienne, France. Appdn. June 2, 1939. In France June 10, 1938. 3 claims. A projector adapted to be used with different size films and having correspondingly sized sprockets mounted on a rotatable plate somewhat similar to a turret plate, with a rotating spindle supporting (the plate and driving the sprockets. No. 2,234,950— Projection Screen. Robert E. Barclay, assignor to The Richard International Photographer for May, 1941 son Co., Lockland, Ohio. Appln. Jan. 24, 1938. 5 claims. A projection screen suitable for both transmitted and reflected images, and formed of a plurality of layers of translucent paper bonded together, one surface being polished and one being roughened. No. 2,235,033 — Combined Sound and Color Picture Film. Alfred Miller, assignor to General Aniline & Film Corp. Appln. Nov. 5, 1937. In Germany Nov. 9, 1936. 1 claim. A color film having a sound track formed in a black and white emulsion on one side of the film, with the color emulsions on the other side of the film, these likewise having the sound track printed in them. No. 2,235,743 — Apparatus For Taking Stereoscopic Pictures. Pierre Gagliardi, Paris, France, assignor to Establissements Emel S. A. R. L., Paris, France. Appln. Feb. 9, 1939. In France Feb. 9, 1938. 3 claims. A device for taking stereoscopic pictures which has two lenses which are both focused by a single adjustment, the same adjustment rotating a prism to compensate for parallax. STRANqE ENqJNEERJNq UNdcRTAkiNq By Charles R. Ferryman, News of the Day One of the world's strangest engineering undertakings is now under way at Mud Mountain Dam in the State of Washington. They are covering a deep canyon with one of the largest known tents so they can build a dam under it, all the while keeping everything nice and dry, they hope. Thirteen thousand square yards of heavy waterproof canvas was cut to fit the zigzag edges of the canyon, where an area 196 by 328 feet will be covered. The canvas weighs 30,000 pounds dry and will be suspended by overhead cables. A series of pulleys and cables make it possible to clear the snow from the top of it and around the canyon walls have been constructed gutters into which the huge tent can drain. Under this huge protecting canvas men and machinery will work for many months to come on the earthen core of Mud Mountain dam. Newsmen were not permitted to ride up and down into the canyon on the "skip" and, as you can see by the photograph, the walls are straight up and down, making it a tough job getting outfits in or out, hence the Eyemos. Left to right: Charles Ferryman, News of the Day; Chalmer D. Sinkey, Fox Movietone News; Earl Nelson, Universal News and Bill Hudson, Pathe News "getting the latest" on Mud Mountain Dam. 25