Motion picture projection : an elementary text book (1928)

Record Details:

Title:
Motion picture projection : an elementary text book
Date:
1928
Publisher:
New York : Technical Book Company
Volume:
Motion picture projection : an elementary text book
Leaf #:
00032
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Niles Essanay Silent Film Museum
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
September 21, 2023
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26 MOTION PICTURE PROJECTION TRANSFORMER. An apparatus used on alternating current systems to raise or lower the voltage. TRANSVERTER. A motor generator set, an A. C. motor connected to a D. C. generator. TRICK CRANK. A camera crank giving a single exposure for each turn. TRICK-PICTURE. A picture in which unnatural action appears. TWO PHASE. An A. C. system of electrical distribution making use of two currents of different phase. Can be arranged with either 3 or 4 wires. VISION. A new subject introduced into the main picture, by the gradual fading-in and fading-out of the new subject, as, for example, to visualize a thought. VOLTAGE. Electric motive force or pressure. VOLTMETER. An instrument used to measure the electric pressure. WATT. The practical unit of electrical power. Equal to amperes times volts. WATT HOUR. Amount of watts times length of hours. WORKING DISTANCE. The distance from the principal focus of a lens to its nearest face; e. g., the distance from the slide or film to the nearest lens of the objective.