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Morse Transmission (Single Needle Telegraph) Artefact of the Month; May 2008.
Single needle telegraph Morse transmission set.
A telegraph is a machine that transmits and receives messages long distance very much like email today. The invention of telegraphy helped to bring the world closer together through quicker communication. Telegraphy was used to send current news and personal messages around the world. Telegraphs used a system known as Morse code to create letters and numbers without physically writing them out. The inventor of Morse code, Samuel Morse, is credited with sending the first US national transmission on 24 May 1844. The line (which ran along the Baltimore and Ohio Railroad between Washington D.C. and Baltimore) was officially opened as Morse sent his famous words "What hath God wrought" along the wire. In order for these messages to go around the world, large telegraph cables were laid under the ocean from country to country. The first successful transatlantic cable system was opened on 18 July 1866. Many of these cables can be seen on display with the Morse Transmission machine.
Morse Transmission (Single Needle Telegraph) - MOTAT collection
1. Relay on the left is made by Siemens, London. 2. Single needle indicator (centre rear) made by A.T.M. (Associated Telegraph Manufacturers), England. 3. Change-over switch (centre) duplex/single. 4. Variable resistance tank on the right. 5. Standard Morse key in the front.
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