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MANAGERS AND PROJECTIONISTS 704
which must be removed. The generator is mounted on the extension of the special tool tray by means of four machine screws supplied with the outfit. The generator is then connected by means of a small round belt to the motor attachment pulley of the mechanism. On all Power's Projectors manufactured within the last two years the motor attachment pulley is provided with a special groove for this belt. On older projectors a new motor attachment pulley is supplied to replace the pulley originally furnished.
The indicating instrument is usually mounted on the front wall of the projection room near the observation port where it can be readily observed by the projectionist. A special adjustable bracket is furnished for mounting the indicating instrument which permits the instrument to be tilted so as to bring its face at any convenient angle. The indicator is electrically connected to the generator by means of a six-foot length of cable supplied with each outfit.
One indicator and one generator are required for each projector. Additional indicators can be connected in the circuit, one usually being placed at the orchestra leader's music stand where synchronized music is used and sometimes another indicator is placed in the manager's office. By means of a multiple snap switch the generator on each projector is connected to the indicator circuit and this switch must be properly set at each change-over. The switch is provided with a small dial with the numbers one and two for a two projector installation or one, two and three for a three projector installation. These numbers indicate the proper setting of the switch for each change-over.
When the Power's Speed Indicator outfit is furnished for the Simplex Projector, the generator is mounted on a small bracket which is attached to the top of the Simplex mechanism. To attach this bracket the two screws holding the top magazine are removed and the bracket placed between the mechanism and the magazine support casting, using the two special length hexagon headed screws which are provided for this purpose. The generator in this case is driven from a small aluminum pulley which is slipped over the Simplex shutter spindle and held in place by set screws.
When indicating instruments are installed at a distance from the projection room — in the orchestra pit or manager's office — a small adjustable rheostat is supplied. This rheostat is usually installed on the front wall of the projection room and its