File:EB1911 Telegraph - umbrella antenna.jpg

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Description

English: In practical wireless telegraphy the antenna is generally a collection of wires in fan shape upheld from one or more masts or wooden towers. Sometimes the prolongations of these wires are carried horizontally or dipped down so as to form an umbrella antenna (see figure).

Date

published 1911

Source

Encyclopædia Britannica (11th ed.), v. 26, 1911, “Telegraph,” p. 534, Fig. 42.

Author

John Ambrose Fleming (section author)

Permission
(Reusing this file)

This image comes from the 13^th 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/Time	Thumbnail	Dimensions	User	Comment
current	15:57, 16 March 2016		806 × 493 (51 KB)	Library Guy	{{Information \|Description ={{en\|1=In practical wireless telegraphy the antenna is generally a collection of wires in fan shape upheld from one or more masts or wooden towers. Sometimes the prolongations of these wires are carried horizontally or di...

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