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drive and re-engages it automatically with the rewind mechanism. There are facilities for both sound and silent film-speeds, for one-hand tilt-control of the projector-head, and for simplified framing and focussing. There is also a voltmeter positioned just above the lens mount, and a new still-device.
The lubrication system is also simplified, and a single oilingpoint is used for central distribution. Motor-bearings are greasepacked, and other bearings are of the oil-less type.
Spools holding 2,000 feet of film may be accommodated on the folding arms, and the take-up is provided with automatic compensation.
The sound from the Carpenter is excellent, and there are separate tone-controls for both high and low frequency attenuation, besides the other knob which controls the volume. The output is ample for any audience up to 2,000 in number, and a well-matched loud-speaker, fitted within its own carrying case, gives faithful response without the slightest trace of "flutter" when working on full volume. It is of the 12" moving-coil type.
Direct scanning is provided within the soundhead, and a revolving sound-drum, together with a new smoothing sprocketwheel, ensures a uniform speed of the film past the scanning beam. The latest type of exciter-lamp is also incorporated, which works on a supply of 6 volts at 15,000 cycles produced by a thermionic oscillating valve and received by the lamp via a transformer.
The threading of the Carpenter may appear a little awkward for those using it for the first time, but it is nevertheless designed for easy manipulation, and after a little experience the operation of threading should not take more than a few seconds.
The projector, loudspeaker and mains-transformer form three separate units, the first two weighing 63 lbs. and 23 lbs. respectively. Cables supplied consist of 50 feet for the speaker and 10 feet for the mains. The projector is robust and of heavyduty construction, and most of the smaller parts are either of stainlesssteel or chrome. Altogether, the Carpenter is a model which fully reflects the makers' experience in precision engineering.
Voltage — For A.C. mains only, using the mains transformer supplied with the equipment. A rotary convertor must be used when
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