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.
The practical electric telegraph system was invented by Samuel Morse in 1837. After Joseph Henry discovered electric induction in 1831, enabling further development in elect â¦ rical telegraphy, the first practical telegraph was invented by Dr. David Alter of Elderton, Pennsylvania, in 1836.