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prisingly simple, and the film is laced at only three pointstwo sprockets and the gate, and there is plenty of "finger-room' ' for the "ham handed."
Apart from all the other niceties to be found in the Imperial, many users will consider that the most important feature is the single row of sprocket teeth, which allows the projection of sound films as well as silent ones. (Sound films must not be used on other machines fitted with two rows of sprockets.)
The gate mechanism includes a new triple-claw movement, which engages three perforations simultaneously and ensures a perfect feed even when two or three consecutive perforations are damaged.
Illumination may be provided by any standard projection lamp of 750 watts or less, and as with all Ampro models, the entire optical system is precision-engineered for maximum brilliance. Film capacity is limited to the standard 400' spool, but if the owner thinks it necessary, 1,600' spool-arm conversion kits can be supplied as an extra.
Other features include a tilt control-knob for moving the projector-head up or down, a swing-out gate, and automatic sprocket-shoes which open and close when the gate is operated. The shoes may also be operated individually when adjusting loops, etc. A 2" coated projection-lens is fitted as standard, but this can easily be replaced by others of various focal lengths when required.
Alignment of the projection lamp with the optical system is provided for by an extremely micrometric adjustment control, and the projection lens is focussed by gently turning it within the lens mount.
Both the motor and mechanism-drive are entirely enclosed, and the former, with its greased-sealed ball-bearings, requires no attention by the operator. Lubrication is also simple and efficient, and is fed by central distribution to the high-speed shafts.
Film speed is governed by a rheostat-type control, which allows projection at any speed within the normal range.
The Imperial is also fitted with a pilot-lamp for easy threading, an excellent framing device, and a powerful fan for cooling the lamp and gate area. It is supplied in the new luggage-type carrying case, and the accessories include a 400' spool, 2" coated
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