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super lens, lamp glove, a bottle of Amproil with an "applicator," a cleaning brush and an instruction book. Standard finish is in bronze, with chrome and stainless-steel fittings.
It is distributed in Britain by Simplex Ampro, Ltd., of 167169, Wardour Street, London, W.i.
Voltage — The Imperial is designed to operate on both D.C. or 25 to 60 cycles A.C., 105 to 125 volts. A step-down transformer must be used when connecting to 230 volts A.C. mains, and a resistance, or convertor and transformer, when connecting to 230 volts D.C. mains.
Bell and Howell-Gaumont Model 601
Model 601 is the latest contribution from two world-famous companies who have combined their skill and experience to make this an outstanding projector — Bell and Howell of America, and Gaumont-British of Britain. The net result of this Anglo-American co-operation is a masterpiece of streamlined engineering incorporating many original and exclusive features.
The whole outfit comprises two well-matched carrying cases in which are contained the projector, amplifier, spool arms, spare belt, oil-can, cleaning-brush, etc. (small case) and the loudspeaker, mains and speaker-leads, spare tool and accessories (large case).
The amplifier is built-in in the base of the projector, but can easily be removed without having to take the projector out of the case. Recent improvements provide complete protection against humidity damage, and the amplifier is ' 'floated on rubber" to minimise damage from jarring. Fidelity of reproduction is assured by the "negative feedback" principle, resulting in balanced reproduction of low, medium and high frequencies without distortion. Self-compensating circuits are also fitted to eliminate any need for adjusting the supply to the photo-cell.
Radio interference is ruled out by the specially designed and built-in eliminator, thus obviating any possibility of crackle or distortion. It is thus possible to use silent films with a radio background, knowing that there can be no hitch involving sound.
The controls, all placed for speedy operation and "natural movement" by the operator, provide all the essentials for professional exhibiting. Both tone and volume controls are exceptional, the former amply modifying tone for film, mike or non155