How does the multiplex railway telegraph work?

Answer 1

One form was invented by Edison, who had many telegraphy patents. the device mechanically sent up to four messages in different directions. They have patent models at the Edison national historical site in one of the Oranges. why don"t you write them. Much later Multiplex was a synonym for , something more modern- Teletype- a forerunner of what I am using now- as it used a typewriter keyboard. (Mux) was a slang term for Multiplex in the sense of Teletype- the Dictionary of American slang bears this out- He could have learned "Mux ( Teletype).