File:EB1922 Telephone - impulse circuit.jpg

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Summary

Description

English: Diagram of connection between telephone dial and subscriber line.

Date

published 1911

Source

“Telephone,” Encyclopædia Britannica (12th ed.), v. 32, 1922, p. 707, fig. 3.

Author

Unknown 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.

File history

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	22:33, 21 November 2019		795 × 291 (26 KB)	Bob Burkhardt	remove caption text
	22:49, 20 November 2019		795 × 291 (27 KB)	Bob Burkhardt	{{Information \|description ={{en\|1=Diagram of connection between telephone dial and subscriber line.}} \|date =published 1911 \|source =“Telephone,” ''Encyclopædia Britannica'' (12th ed.), v. 32, 1922, p. 707, fig. 3. \|author ={{Unknown\|author}} \|permission ={{PD-Britannica}} }} Category:Telephone diagrams

File usage

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