Back to the beginning of the Museum Web Site

R U N N I N G   T H E   S H O W

Page 25

starting, you may add more blank leader, provided, of course, it is added before the "START" mark. Leader must always be so added if it is found that the voice or music begins before the motor is fully up to speed.

If the machines are equipped with a safety device which stops the motor when the film has run through, then, with disc reproduction, in case the record does not end until some time after the finish of the film, this ending will be spoiled through the safety device shutting down the equipment, unless sufficient blank film is added at the end to keep this device from operating until the music is finished. Check this point during rehearsal and before running show make sure these blank lengths have been added to any reels that require them.

With subjects using disc reproduction a broken film is a more serious interruption than with ordinary subjects, on account of the need for synchronism between record and film, and with film reproduction, a break is also specially objectionable because it cuts off the music as well as the picture. Therefore, examine all synchronized films and sound films with extra care when rewinding, so as to catch tears before they develop into breaks. For this reason, rewind by hand and not by motor.

In film reproduction make especially sure that the film has been put in as good condition as possible and that the mechanism is clean, as covered previously under "Starting and Testing-Cleaning Film Reproducing Apparatus". Oil or grease from the projector or film pick-up mechanism is particularly liable to get on the first few feet of film.

Keep emergency films in containers unless they have to be used.

Synchronized films and sound films come treated ready for immediate use, and require no different care than ordinary films, except as just noted.

Keep all records in envelopes they come in, when not in use. Put each record in its envelope with the playing side next the felt, and facing you. Keep the records in correct order for the next show.

Synchronized Subjects

The process of running synchronized subjects, using either film or disc reproduction, is as follows:

(1) Follow out starting and testing procedure, and set up first two synchronized numbers on the two machines to be used, exactly as described in preceding sections.

(2) Strike arc on first projector in usual manner.

(3) When lamp is in operating condition< and show is ready to proceed, start motor of first projector.

(4) When motor is up to speed open douser.

(5) Bring fader up SLOWLY so that it reaches correct setting just before voice or music begins. (This needs rehearsal).

Motor used in this equipment takes four or five seconds to speed up, because of heavy flywheel required. NEVER move fader from zero before motor has reached full speed, as this will completely spoil beginning of speech or music. If sound begins before motor has finished speeding up, add leader to film as required.