American cinematographer (Jan-Dec 1926)

^isliteen AMERICAN CINEMATOGRAPHER September, 1926 stand up under heavy work, our problems would be solved. It remained for the Bell & Howell Company of Chicago to furnish us with such a machine, but is was necessary for them to change their positive splicing machine so that it would give us the full hole splice. It was also necessary to put a number of other special attachments on the machine which we believe to be highly essential in exchange work. Today every one of our 41 exchanges in the United States is equipped with a Bell & Howell splicing machine. Our laboratories and film depot are all similarly equipped. This machine has more than stood the test in the quality of the splice, ease and simplicity of operation and speed in making splices. The plates on which the splices are made are heated to about 120 degrees F. electrically. The heat not only acts as a binder to the splice but makes the cement quick drying. Special Theatre Type Negotiations are in progress at this time for the manufacture of a special theatre type of splicing machine and I assure you that once projection rooms are equipped with splicing machines that will make the same kind of a splice which we are making in our exchanges, your troubles and our troubles will be reduced materially. Six Primary Causes In order that there would be no mistakes made in developing apparatus, methods, and standards for splicing film, it was necessary to make several slow motion pictures showing the action of film in projectors under actual operating conditions. We can safely say that there are six primary causes for film damage which should be studied and avoided. Cause No. 1. Splice out of register (of sprocket holes not perfectly matched.) Splices of this kind will jump while passing through the projector and damage the film. Cause No. 2. Splicing too wide. A splice is stiff and unbending, and if too wide will not seat properly on the sprocket wheels of the projector, causing a jump with probable damage. Cause No. 3. Emulsion or gelatin not entirely removed. Due to the fact that film cement only acts upon the celluloid base of the film, it is necessary to entirely remove the emulsion in making the splice. Where there is a particle of emulsion, the cement will not hold, causing the splice to open and come apart. CINOPHOT The Automatic Exposure Meter for the Movie Camera Patented by Dr. Emil Mayer S-JK5 Automatic — scientifically exact under all light conditions. Gives correct diaphragm settings for sun and twilight, outdoors, studio, natural or artificial light. Adjustable for individual vision. Always ready for use. The CINOPHOT saves film waste and disappointment. Price in fine sole leather case, .SO 12 Chas. G. Willoughby, inc. HO West 32nd Street New York, N.Y. JERRY PHILLIPS Professional Airplane Pilot Specializing in Motion Picture Work. Producers and Cinematographers — Attention ! Planes Equipped to Carry Motion Picture Cameras on Tail Section, Wings or in the Cockpit. Flying Instruction. Flights to any part of the Country. Technical Assistance on Productions. Phones: Santa Monica 21005 and GRanite 4274, Clover Flying Field or 933 Eighteenth Street, Santa Monica, Calif. SUBSCRIBE FOR THE American Cinematoqrapher J m