The talkies (1930)

Page scan 00047 from The talkies

Record Details:

Title:
The talkies
Date:
1930
Publisher:
London: Crosby Lockwood and Son
Volume:
The talkies
Leaf #:
00047
Language:
English
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
August 29, 2024
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THE TALKIES 21 make long-distance wireless telephony possible. I believe that as many as thirty microphones coupled up together were used when the first words were radioed across the Atlantic. A great deal of ingenuity was expended in this direction, and some microphones were used experimentally which would control electric currents equivalent to many horse-power, using various liquids to keep them from catching fire. Another way of attacking the problem was to make use of an effect which had been noticed some years previously, and which had been used in attempts to increase the range of searchlight telephones similar to those of Herr Ruhmer and others. The principle involved was roughly as follows : Quite a small microphone was associated in a special way with an electric arc-light, which had been arranged so that it would generate the oscillations necessary to transmit a wireless wave ; variations in the microphone, which was connected to the arc-light, caused certain changes in the electrical condition of the space between the two carbon rods from which the familiar brilliant glow emerges. Words spoken into the microphone caused sympathetic variations in the strength of the wireless wave emitted by the arc.