Martin Luther King, Jr.
When was the simple wire telegraph invented?
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Asked in Inventions
What year was the Electromagnetic Telegraph invented?
Asked in Inventions, Telecommunications, Thomas Edison
When was the telegraph invented?
There were several steps towards the invention of the telegraph. The non-electric telegraph was invented in 1794 by Claude Chappe. This system used semaphore, rather than electrical signals along a wire, as later telegraphs did. A simple form of electric telegraph using liquid and the concept of electrolysis was invented in 1809 by Samuel Soemmering of Bavaria. This was not a commercially viable product, but it showed how electrical signals could be transmitted. In 1825 William Sturgeon invented the electromagnet, which would later play a big part in the transmission of signals via telegraphs. In 1830, Joseph Henry used Sturgeon's concept of the electromagnet to send communication signals along a wire. The electric telegraph itself, which came to be the mainstay of 19th century communications, was investigated and improved upon from around 1835 by Samuel F B Morse. In 1843, the first experimental telegraph line from Washington to Baltimore was constructed, using Morse's concepts. In 1893, the wireless telegraph was invented by Guglielmo Marconi.