Cine-film projection : a practical manual for users of all types of 16-mm. (1952)

Record Details:

Title:
Cine-film projection : a practical manual for users of all types of 16-mm.
Date:
1952
Publisher:
London : The Fountain Press
Volume:
Cine-film projection : a practical manual for users of all types of 16-mm.
Leaf #:
000186
Language:
English
Collection:
Books
Format:
Books
Contributor:
Niles Essanay Silent Film Museum
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
June 20, 2024
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TAKE-UP: The device or mechanism used to take up the film onto a spool as the film leaves the projector. THROW: The length of the projected light-beam between the lens and the centre of the screen. TRAILER: A short length of opaque film attached to the end of a part or spool of film. The National Anthem forms the " Queen Trailer/1 TRANSFORMER: A device used for changing the voltage of an alternating current. It may be either a step-up transformer or a stepdown one, and is usually fitted with a tapping switch or screw for regulating the output. Transformers must not be used on D.C. VARIABLE CONDENSER: A condenser so designed that its capacity may be quickly altered. VOLT: The electrical unit of pressure, or electromotive force. WATT: The practical unit of electrical power, and equal to one joule per second. A joule is the unit of energy. The output from an amplifier is measured in wattage. WOW: A slight alteration in sound-speed as the film passes through the soundhead will cause the sound to go sharp or flat. The noise then heard from the speaker is termed a "wow." It may easily be caused by incorrect threading or by a fault in the smoothing system. Should it be caused by the film riding off a sprocket-wheel, the motor must be switched off at once and the film rethreaded. 182