Pat465971.png
Summary
Description Pat465971.png |
English:
Diagram from
Thomas Edison
's 1891 patent of his wireless ship communication system. This proposed using vertical wires suspended from a ship's mast to communicate
radiotelegraphically
with nearby vertical antennas on shore. This predated by 3 years
Guglielmo Marconi
's first radio communication experiments. However it was designed to work by electrostatic induction, not radio waves. It was never tried, as Edison was too busy with other projects.
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Date | |
Source | US patent 465971, T. A. Edison, Means for transmitting signals electrically , granted 29 December 1891 , fig. 1 |
Author | Thomas Alva Edison |
Licensing
Public domain Public domain false false |
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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