File:NIE 1905 Telephone - hook circuit.jpg
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Size of this preview: 800 × 556 pixels. Other resolutions: 320 × 222 pixels | 640 × 445 pixels | 1,009 × 701 pixels.
Original file (1,009 × 701 pixels, file size: 189 KB, MIME type: image/jpeg)
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Summary
| Description |
English: Telephone circuit with hook down and hook up: a and c binding posts connecting with the line. The post b forms the ground connection for lightning. The dotted lines indicate that part of the circuit cut out by the hook switch. |
| Date | published 1905 |
| Source | “Telephone,” The New International Encyclopædia, v. 19, 1905, p. 103. |
| Author | unknown author |
Licensing
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
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File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 22:16, 29 August 2017 | | 1,009 × 701 (189 KB) | Bob Burkhardt | {{Information |Description ={{en|1=Telephone circuit with hook down and hook up: ''a'' and ''c'' binding posts connecting with the line. The post ''b'' forms the ground connection for lightning. The dotted lines indicate that part of the circuit cu... |
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