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Electrical telegraphy is a point-to-point text messaging system, primarily used from the 1840s until the late 20th century.
The timeline of North American telegraphy is a chronology of notable events in the history of the electric telegraphy in the United States and Canada, including the rapid spread of telegraphic communications starting from 1844 and completion of the first transcontinental telegraph line in 1861.
Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas pigeon post is not.
Developed in the 1830s and 1840s by Samuel Morse and other inventors, the telegraph revolutionized long-distance communication. It worked by transmitting electrical signals over a wire laid...
Telegraph, any device or system that allows the transmission of information by coded signal over distance. The term most often refers to the electric telegraph, which was developed in the mid-19th century and for more than 100 years was the principal means of transmitting printed information.
What is a telegraph? A telegraph is a communication system that sends information by making and breaking an electrical connection. It is most associated with sending electrical current pulses along a wire with Morse code encoding.
The electrical telegraph was first used from 1838, and it sent electrical impulses along a cable, which could then be decoded into messages. Who invented the electrical telegraph? The electrical telegraph was first patented in 1837 by Cook and Wheatstone in England.
The non-electric telegraph was invented by Claude Chappe in 1794. His system was visual and used semaphore, a flag-based alphabet, and depended on a line of sight for communication. The optical telegraph was later replaced by the electric telegraph, which is the focus of this article.
In 1861 it completed the first transcontinental telegraph line, connecting San Francisco to the Midwest and then on to the East Coast. After the Union Pacific Railroad was finished in 1869, much of the line was relocated to run along the railroad right-of-way to facilitate maintenance.
Invention of the Telegraph Long before Samuel F. B. Morse electrically transmitted his famous message "What hath God wrought?" from Washington to Baltimore on May 24, 1844, there were signaling systems that enabled people to communicate over distances.