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MANAGERS AND PROJECTIONISTS 803
can also be used on the G. E. lamps now in service, therefore the solid nickel contacts formerly manufactured by the General Electric Company will no longer be supplied.
The new positive baffle plate can also be used on the G. E. lamps by removing the positive asbestos guide plate and replacing it with the positive guide plate, having the studs drilled out and tapped 10 receive the screws holding the new style positive baffle plate. When this change is made on the G. E. lamp, the life of the positive contacts will be greatly prolonged.
The negative pigtail connector used on the G. E. lamp can also be readily replaced with the new type of negative crimped ribbon connector heretofore described above.
In addition to the parts mentioned above, the following parts are also common to both the Power's Improved Lamp and the G. E. lamp :
Positive and negative feed clutch parts.
Worms and worm gears.
Positive drive bevel pinion and gear.
Spur gear on positive feed tube.
Spur gear and starwheel on positive feed screw.
Detent bracket and spring.
Insulated coupling on feed shafts.
Positive and negative cable clamps.
Front bearing support for positive revolving carriage.
Negative feed crank.
Positive feed knob.
Motor.
The following parts used on the Power's improved Lamp cannot be used on the G. E. Lamp :
Positive and negative carbon clamps.
Positive feed screw.
Positive carbon carriage assembly.
Rear bearing support for positive carbon carriage.
Negative support casting.
Negative drive gears.
Base plate.
Such parts of the G. E. type lamp which cannot be replaced with corresponding parts used on the Power's Improved lamp will continue to be supplied. Such parts will be manufactured in the factory of the International Projector Corporation and will be accurately machined from fixtures and jigs so that as far as possible they will be interchangeable with the parts