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The optical telegraph was the forerunner of the electronic telegraph. The system was technically clumsy, but at the time it allowed for record-breaking speeds of data transmissions.
These telegraphs were also built in Finland, first by order of the King of Sweden and later by order of the Russian Tsar.
S04 E02
00:00 Intro
02:52 Technical Developement
04:41 Basics of Optical Telegrams
06:20 Control Commands
07:30 Different Telegraph Systems
08:36 Claude Chappe
10:51 Abraham Edelcrantz
12:24 Pierre-Jacques Chatau
14:25 Carl Otto Ramstedt
17:36 Kokkola Optical Telegram
18:36 End of usage
Disclaimer:
I am mainly a military history enthusiast. The videos are intended for informative entertainment. They are quite short general introductions, not diving too deep into technical details.
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www.youtube.com/@satunnaistas...
* Links:
Gullö gård www.gullo.fi/
Chappe Télégraphe mechanism: • chappe telegraphe.wmv
Chappe comic strip: injs-bordeaux.org/tour-chappe-2/
First online hoax: • How the first ever tel...
* An uncertain and unofficial list of possible telegraph locations:
docs.google.com/document/d/1u...
Music:
"Kiitorata" by Saundiamo
"URL Melt" by Unicorn Heads (from KZbin audio library)
Represented systems:
Claude Chappe
Abraham Edelcrantz
Pierre-Jacques Chatau
Carl Otto Ramstedt
Sources:
Henrik Cederlöf: Farleder och lotsplatser i Ekenäs skärgård
Einar Risberg: Suomen lennätinlaitoksen historia 1855-1955
Pierre-Jacques Chatau: Télégraphe de jour et de nuit, suivi d'un télégraphe de jour à double transmission Broché
Den optiska telegrafen - Försvarets Historiska Telesamlingar,FHT
Valery Shilov, Vladimir Kitov, and Yaroslav Nazarov: Optical Telegraphy in Russia 1794-1854
ps://www.lowtechmagazine.com/2007/12/email-in-the-18.html
Gerard J. Holzmann: The Use of Optical Telegraphs in England and Elsewhere
injs-bordeaux.org/tour-chappe-2/
www.tekniskamuseet.se/template...
people.seas.harvard.edu/~jones...
injs-bordeaux.org/tour-chappe-2/
www.inkoo.info/l/ilmatelegraf...
DeepBlue: The first telecoms fraud and the lessons to take from it