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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. [1] Keys are used in all forms of electrical telegraph systems, including landline (also called wire) telegraphy and radio (also called wireless) telegraphy .
Cover of The Railroad Telegrapher, monthly magazine of the Order of Railroad Telegraphers, for March 1902.. The Order of Railroad Telegraphers (ORT) was a United States labor union established in the late nineteenth century to promote the interests of telegraph operators working for the railroads.
Great Western Railway telegraphic codes were a commercial telegraph code used to shorten the telegraphic messages sent between the stations and offices of the railway. The codes listed below are taken from the 1939 edition of the Telegraph Message Code book [ 1 ] unless stated otherwise.
A telegraph code is one of the character encodings used to transmit information by telegraphy. Morse code is the best-known such code.Telegraphy usually refers to the electrical telegraph, but telegraph systems using the optical telegraph were in use before that.
1911 Chart of the Standard American Morse Characters. American Morse Code — also known as Railroad Morse—is the latter-day name for the original version of the Morse Code developed in the mid-1840s, by Samuel Morse and Alfred Vail for their electric telegraph.
Bunnell and Co. was one of the largest telegraph key suppliers in USA before the World War II. As one of the country's main telegraphic manufacturers, examples of Bunnell's telegraph equipment can be found in the Smithsonian's Museum of American History, various railroad museums, and other communications museums.
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With the advent of the telegraph, a more sophisticated system became possible, since the telegraph provided the first system available where messages could be transmitted faster than the trains themselves. The telegraph allowed the dissemination of alterations to the timetable, known as train orders. These overrode the timetable, allowing the ...