File:Signaling by Napoleonic semaphore line.jpg

From KYNNpedia

Original file(1,075 × 912 pixels, file size: 265 KB, MIME type: image/jpeg)

This file is from Wikimedia Commons and may be used by other projects. The description on its file description page there is shown below.

Summary

Description
English: Illustration of communication by mechanical semaphore in 1800s France. Lines of towers supporting semaphore masts were built within visual distance of each other. The arms of the semaphore were moved to different positions, to spell out text messages. The operators in the next tower would read the message and pass it on. Invented by Claude Chappee in 1792, semaphore was a popular communication technology in the early 19th century until the telegraph replaced it.
Date
Source Retrieved June 11, 2014 from Radio News magazine, Ziff-Davis Publishing Co., Inc., New York, Vol. 32, No. 5, November 1944, p. 71 archived on http://www.americanradiohistory.com/
Author The drawing is signed "Keith Thomas" in lower right corner
Permission
(Reusing this file)
This image is from an advertisement by Universal Microphone Co. without a copyright notice published in a 1944 magazine. In the United States, advertisements published in collective works (magazines and newspapers) are not covered by the copyright notice for the entire collective work. (See U.S. Copyright Office Circular 3, "Copyright Notice", page 3, "Contributions to Collective Works".) Since the advertisement was published before 1978 without a copyright notice, it falls into the public domain.

Licensing

This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art.

العربية  беларуская (тарашкевіца)  čeština  Deutsch  Ελληνικά  English  español  français  Bahasa Indonesia  italiano  日本語  한국어  македонски  Nederlands  português  русский  sicilianu  slovenščina  ไทย  Tiếng Việt  中文(简体)  中文(繁體)  +/−

Flag of the United States
Flag of the United States

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

November 1944

271,821 byte

912 pixel

1,075 pixel

image/jpeg

8b9d85f240b6a0f90734b73f560dad3c31fb4307

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current15:12, 2 April 2015Thumbnail for version as of 15:12, 2 April 20151,075 × 912 (265 KB)wikimediacommons>ChetvornoUser created page with UploadWizard

The following 2 pages use this file: