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Sample of loading coil for Dover - Cap Grisnez submarine telephone cable, 1910
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Sample of loading coil for Dover - Cap Grisnez submarine telephone cable, 1910, result 1 of 1

Item Details
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Available to everyone
Title
Sample of loading coil for Dover - Cap Grisnez submarine telephone cable, 1910
Sample of Pupin loading coil for Dover - Cap Grisnez submarine
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Work Type
Telecommunications
Date
1910
Location
Woolwich
Material
copper (alloy)
gutta-percha
Measurements
overall: 987 mm x 70 mm diameter, 1.5 kg
Description
Sample of Pupin loading coil for Dover - Cap Grisnez submarine telephone cable, probably made by Siemens Brothers and Company Limited, Woolwich, 1910
Sample of Pupin loading coil for Dover - Cap Grisnez submarine telephone cable, probably made by Siemens Brothers and Company Limited, Woolwich, 1910.
The Dover to Cap Grisnez telephone cable was the first cable between England and the Continent to use loading coils. These were used to 'load' the cable with additional inductance to balance the greater capacitance caused by the cable's immersion in seawater. By doing so they reduced the capability of the cables to store electric charges, a problem which had meant that earlier telephone cables struggled with satisfactory speech transmission.
Repository
Donated by the Institution of Electrical Engineers
Accession Number
Subject
coil
ID Number
co33299
Source
Image and original data from Science Museum Group
Rights
The source metadata displayed in the Description field is released under a Creative Commons Attribution 4.0 license.
All other source metadata is released under Creative Commons Zero.
File Properties
File Name
large_1953_0114__0003_.jpg
SSID
26290379

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