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File:EB1911 Telegraph - Cordeaux Insulator.jpg

EB1911_Telegraph_-_Cordeaux_Insulator.jpg ‎(194 × 505 pixels, file size: 44 KB, MIME type: image/jpeg)

Description
English: Cross-section diagram of Cordeaux insulator for suspending telegraph wires. It is made in one piece. A coarse screw-thread is formed in the upper part of the inner cup, and this screws on to the end of the iron bolt by which it is supported. Between a shoulder, a, in the iron bolt and a shoulder in the porcelain cup, c, is placed an indiarubber ring, which forms a yielding washer and enables the cup to be screwed firmly to the bolt, while preventing the abrasion of the porcelain against the iron. The advantage of the arrangement is that the cup can at any time be readily removed from the bolt.
Date published 1911
Source Encyclopædia Britannica (11th ed.), v. 26, 1911, “Telegraph,” p. 512, Fig. 2.
Author Harry Robert Kempe (section author)
Permission
(Reusing this file)
Public domain This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

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Date/TimeThumbnailDimensionsUserComment
current18:57, 11 February 2016Thumbnail for version as of 18:57, 11 February 2016194 × 505 (44 KB)Library Guy{{Information |Description ={{en|1=Cross-section diagram of Cordeaux insulator for suspending telegraph wires. It is made in one piece. A coarse screw-thread is formed in the upper part of the inner cup, and this screws on to the end of the iron bol...
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