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 real inventor of the telephone, Meucci (1808â1989), had been working in Cuba in the 1830s, developing methods for treating illnesses using electric shocks, when he discovered the ability of sound to travel through electrical impulses. He later moved to Staten Island to follow up on his discovery.