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In the Frenchman, Claude Chappe used a visual network to send a message ten miles away. The visual network consisted of a telescope, a clock, a codebook, and white and black panel.
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• The first non-electrical telegraph was made by Claude Chappe.
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Samuel Sommering created the first-ever crude telegraph.
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The first US telegraph was made by Harrison Dyar.
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Joseph Henry demonstrated the potential of William Strugeons electromagnet for long-distance communication. By sending an electric current over one mile of wire to activate an electromagnet, causing a bell to ring.
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Samuel Morse created the first recording electric telegraph. He used pulses of current to deflect an electromagnet, which moved a marker to produce written codes on a strip of paper. This led to the invention of the Morse Code.
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William Cooke and Charles Wheatstone panted the Cooke and Wheatstone telegraph using the same principle of electromagnetism.
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Morse obtained a patent in the United States but split his patent right to gain the support of influential partners.
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Morse obtained a $30,000 grant from Congress to build an experimental line between Baltimore and Washington.