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A Morse Key from G. Hasler, Bern (1900) first used by Gotthard Railway. A telegraph key, clacker, tapper or morse key is a specialized electrical switch used by a trained operator to transmit text messages in Morse code in a telegraphy system. Keys are used in all forms of electrical telegraph systems, including landline (also called wire ...
Jesse Bunnell was born on 28 November 1843, in Massillion. At the age of 11 he became a messenger, at 13 he became a full-time telegraph operator. At 17 he set a telegraph speed record, established while transmitting President Buchanan's last message to Congress. The speed was about 32 words per minute for 2 hours.
Jan 1837: Samuel Chester Reid proposes that the U.S. Congress fund an optical telegraph (semaphore line) from New York to New Orleans. [1] Sept 1837: Morse employs Alfred Vail to improve his telegraph from demonstration purposes for a share of future patent rights. [1] Sept 1837: Samuel Morse files for a patent for his electrical telegraph in ...
telegraph key, recording telegraph, ‘dot-and-dash’ telegraph alphabet. Alfred Lewis Vail (September 25, 1807 – January 18, 1859) was an American machinist and inventor. Along with Samuel Morse, Vail was central in developing and commercializing American electrical telegraphy between 1837 and 1844. [1][a] Vail and Morse were the first two ...
The spark gap is inside the box with the transparent cover at top center. A spark-gap transmitter is an obsolete type of radio transmitter which generates radio waves by means of an electric spark. [1][2] Spark-gap transmitters were the first type of radio transmitter, and were the main type used during the wireless telegraphy or "spark" era ...
Granville Tailer Woods (April 23, 1856 – January 30, 1910) was an American inventor who held more than 50 patents in the United States. [1] He was the first African American mechanical and electrical engineer after the Civil War. [2] Self-taught, he concentrated most of his work on trains and streetcars.
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The telegraph represented a disruptive innovation in the history of the United States from its invention in the 1830s onward by quickly becoming a vital part of the nation's communication infrastructure. Its relative importance declined with the spread of telephones in the 20th century. Telegraph service permitted short texts to be sent cheaply ...