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1790
Chappé invents visual telegraph system
Claude Chappé invented and organised a ‘visual’
telegraph using stations within line of sight of each
other , which used manipulable arms and a special code
to enable long-distance messages to travel quickly. The
first message, from the Channel coast to Paris, took 2
hours. The Swedish government established a chain of Chappé
telegraph stations around the north Baltic coasts of what
is now Sweden and Finland to facilitate passing military
information quickly. The Chappé telegraph had several
interesting characteristics, including the development
of ‘compressed’ forms of code, in which much information
can be fitted in to a small number of “characters”. |
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