Sound motion pictures : from the laboratory to their presentation (1929)

Page scan 000175 from Sound motion pictures : from the laboratory to their presentation

Record Details:

Title:
Sound motion pictures : from the laboratory to their presentation
Date:
1929
Publisher:
Garden City : Doubleday, Doran & Company, Inc.
Volume:
Sound motion pictures : from the laboratory to their presentation
Leaf #:
000175
Language:
English
Subjects:
Motion Pictures, Motion pictures--Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
August 22, 2024
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OPERATING MANUAL 155 "Dial Settings for Motor Control." Start the projector by snapping the "Line" switch to the "Run" position. B. A. C. Motor Drive Start the projector by snapping the "Line" switch to the "On" position. IV. FADING Fade in the projector which is to start. When it has come up to speed snap either one of the switches marked "Fader." The red pilot lamp on the input panel will indicate whether or not the machine is faded in. V. SOUND CHECK Run up the "Gain Control" on the amplifier to a setting already determined. Listen for the sound from the monitor loudspeaker of the push-the-button switch beside the instrument marked "Speaker Current." A fluctuating reading of the instrument needle should be obtained if the system is operating. If there is no evidence of a signal check the mazda lamp in the optical system and change to the spare lamp if necessary. If there is still no evidence of a signal change to the spare amplifier. VI. CHANGE-OVER At the time of the change-over, the projectionist whose machine is finishing should operate the fader switch at the proper time. This process is repeated on all changeovers until the end of the performance. VII. STOPPING PROJECTORS A. D. C. Motor Drive Snap the "Line" switch to either "Brake" position. After the machine stops, snap the "Line" switch to "Off."