guidon (plural guidons) 1  A small pennant or banner carried by infantry soldiers to direct troop movement. 2  A soldier assigned to carry such a banner.
Within a year or two, Western Union and other telegraph companies were using diplex telegraphs on their busiest lines in major cities. In 1874, Thomas Edison invented the first quadruplex telegraph, which was capable of sending two messages simultaneously in each direction.ears later, quadruplex telegraphs were displaced by two new inventions, multiplex telegraphy capable of eight or more simultaneous transmissions, and the use of teletype machines, which did not require their operators to know Morse Code.
By the time that Morse received the message and returned home, his wife had already been buried. His new passion became creating a way to send messages over long distances fast. The first telegraph was invented in 1809 in Bavaria by a man named Soemmering. His device was crude and required decoding a message by means of electrolysis. In 1828, Harrison Dyar created a telegraph that would burn holes in special paper by means of an electric arc. Through the 1830s, a few Americans tried their hand at utilizing the newly invented electromagnet (1825, William Sturgeon) to send signals to ring bells or scratch paper.