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speed must be maintained when reduced to 16 mm. However, the 16 mm. projector, when operated in the home at this speed, would be rather noisy and this might interfere with enjoyment of the sound reproduction. At the same time, to reduce the speed of the film and record would spoil the reproduction.
In order to reduce the projector speed to the normal sixteen per second, and at the same time to use the standard 33-1/3 professional records at their original speed, a highly novel and ingenious method has been worked out by William H. Bristol, head of the Bristolphone Company, of Waterbury, Connecticut. Mr. Bristol has perfected
THE BRISTOL SYNCHRONIZER IN USE WITH A FILMO PROJECTOR
an optical reduction printer which removes every third frame from the 35mm. original in transferring to 16mm. When projected at two-thirds the speed at which it was originally recorded, perfect synchronism is maintained between the shortened film and the original sound-on-disc record. A special pair of synchronous motors has been developed, one of which operates the projector and the other the turntable. These two motors operate precisely in unison but, should the synchronization become disturbed by any cause, the sound record may be advanced or retarded at will while the machine is running. This is accomplished electrically and is a special feature of the device. At a recent demonstration at the Stevens Institute of Technology, perfect synchronism was maintained between a Bell & Howell projector equipped with the special Bristol motor and a standard 33-1/3 theatre turntable. The film used was a reduction from 35 mm. and the elimination of every third picture was not at all noticeable. According to the latest advice, the complete machine as described is not yet commercially available to the amateur but will soon be in production at Waterbyry.
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