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Page 26

(6) For synchronized feature pictures, keep track of operation by listening to monitor and by matching screen for cues. Do not make monitor so loud it can be heard outside projection room. At cue "SM" as given on cue sheet, start motor on second machine. At cue "CO", operate change-over so as to switch picture from outgoing projector to incoming. As soon as voice or music from outgoing machine is finished, bring fader of this machine to zero and then up to proper setting for incoming machine in time to catch first note of music. (This needs rehearsal).

Stop outgoing machine, kill arc, and set up third film, and also third record, with disc method.

(7) For synchronized subjects other than feature pictures, keep track of operation by listening to monitor and watching pictures. As soon as last note of music or last word is heard, bring fader to zero, then fade out picture as soon as subject matter requires. Start second machine in same manner as already described for first machine. Proper instant for starting second machine so as to get right time interval between end of first subject and beginning of second, must be determined by rehearsal.

NEVER stop motor on any machine before fader has been brought to zero or switched to incoming machine, as otherwise end of speech or music will be spoiled.

Stop outgoing machine, kill arc and set up for third subject.

Continue process of switching from one machine to the other until show is completed.

(9) When synchronized presentations are finished shut down amplifier and power equipment as covered in previous sections. Put away films and records.

(10) When using film pick-up, after running each reel wipe off with a rag the light aperture and film tracks of aperture plate and tension pad in reproducing attachment, so as to guard against possibility of dirt accumulating and obstructing light beam or scratching film.

Non-Synchronized Subjects

When films without synchronized accompaniment are being used, and it is not desired to operate at the standard synchronized speed of 90 ft. per minute, throw the regulating switch on the motor control box to the "VAR" Position and turn the control knob to regulate the speed as desired. The motor is started and stopped by the foot switch used in synchronized operation.

Use of Tilting Mechanism

If the house has both a front and a back screen, change the projection angle, in going from one screen to the other, by turning the tilting handwheel (Fig. 1). Upper and lower stop nuts are provided to check the movement of the handwheel when the correct angle is reached. Be sure to loosen the tilting clamp before turning the handwheel, and be sure to tighten it again when the angle has been changed.

If for any reason it is desired to change the tilt of the machine by a large amount, first see that the tilting clamp is tight, then loosen the two tilting stud setscrews (Fig. 1) which grip the tilting rod. Hold the rear of the lamp house bracket in one hand, loosen the tilting clamp with the other, and tilt the machine as desired. Then tighten clamp and setscrews.

Important - Use of Foot Brake

When the foot switch is pressed down lightly, it turns off the starting switch and stops the machine. If it is pressed down more heavily, against the resistance of the spring, it applies a brake to the motor flywheel. However, this braking-feature is not to be used as a regular thing, as this is not necessary and would cause excessive wear. It is only to be used in emergencies, such as film breakage, when a quick stop is necessary to avoid damage.