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.
Samuel F. B. Morse invented the first telegraph in 1837. Before Morse many inventors tried and worked on the same but the first practical instrument that could send telegraph using electricity successfully was designed by him. Samuel Morse was a professor of art and design at New York University in 1835. He became interested in telegraphic device in 1832 and started working on it. For the samehe took technical assistance from Leonard Gale, a chemistry professor and monetary support from Alfred Vail.