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July, 1937] PROGRESS OF MOTION PICTURE INDUSTRY 35
for 60 meters of film, which can easily be exchanged because the supply reel as well as the take-up reel are included in the cassette so that all threading is eliminated. The camera has a revolving head for three lenses (//2.3, focal length 28-75 mm.). The most important novelty of this new ARRI-Camera is the mirror-reflex arrangement, which allows a clear, upright, and parallax-free image of the picture during the running of the film. The motor for driving the camera is arranged vertically below the camera, and acts at the same time as a handle and stabilizer.
The Standard 7 Aero Projector of Eugen Bauer G. m. b. H. was further improved last year, and a special characteristic is the flanged motor provided with a fan for supplying the film-gate and the film with cool air. This air impinges upon the film from four nozzles through channels in the ground plate of the film-track.
As a further safety device, the air valves are controlled by the air blast. This safety device, called the Flammex, switches off the light-beam as soon as the film or a splice breaks, in the gate. In connection with this device a cut-off switch for the driving motor can be furnished which will stop the motor immediately when trouble occurs.
Due to the increased use of substandard film for all purposes for which the smaller film is sufficient, during the last year a great number of film treating and film printing equipments were developed. The Union Tonfilm maschinenbau und Vertriebs-Gesellschaft in Berlin have marketed an optical reduction printer (35-mm. to 16-mm.), an optical printer for 16-mm. film, a contact printer for 16-mm. film, and a reproducing and cutting table for 16-mm. sound-film.
Regarding the brightness of the pictures in the theaters, certain progress was made during the past year that is especially interesting in connection with the efforts made by Opticolor and Siemens & Halske in introducing the lenticular film in the theaters. During the Olympic Games the Siemens-Berthon color-film was shown for the first time, and it was reported that the satisfactory brightness of the projected pictures was due to the design of a new lamp.
In the processing field, Arnold & Richter constructed fully automatic developing machines for 35-mm. film with different footage capacities. They also constructed for 16-mm. film a fully automatic machine in three different sizes, which can be used also for processing 8-mm. film.
In the field of substandard cameras, Siemens & Halske have intro