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

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 #:
000409
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:
March 28, 2024
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A GLOSSARY OF TECHNICAL AND SEMITECHNICAL WORDS Every human activity seems to gather to itself a set of words and symbols that have special meanings when used in the particular field. The definitions that follow are intended to clarify the group of technical and semitechnical terms which are used in connection with sound equipment. The definitions in some cases are not scientifically complete, but they contain about all that can be given without impairing the clearness of an elementary and simplified list: Alternating Current (Abbr. A. C): An electric current that reverses in direction at regular intervals of time. Alternator: A generator of alternating electromotive forces which produce alternating current when applied to a circuit. Ammeter: An instrument for measuring electric current strength in amperes. Amperage: The rate of flow of electric current in a circuit measured in amperes. Ampere: The practical unit of electric current strength; the current produced by a potential of one volt in a circuit having one ohm resistance. Amplifier: An instrument that copies and magnifies the effect of a local source of energy in accordance with applied variations, to produce a greater effect than could be had from the applied variations alone. Anode: (i) An electrode leading current into a device. (2) An electrode from which current passes within a device. 377