Concept in Definition ABC

The concept of Telegraph can be used with three senses to refer, on the one hand, to that system of communication that allows you to transmit quickly and distance messages written thanks to a code. On the other hand, the term is also used to designate the apparatus, device that is used in the indicated system and that allows the sending and receiving of messages.
And finally the term is used to refer to the administration in which the indicated communication system is assigned.

The telegraph was an invention that made electrical communication a reality, since it is the first expression that is recorded in this type of communication. The telegraph uses electrical signals to send and receive coded messages through radio lines.
Now, the first telegraph appeared towards the end of the 18th century, in 1794, although it did not use the electricity Rather, it consisted of a visual system that used a flag that was based on the alphabet, while it depended on a line of sight to specify communication.

Soon after, the aforementioned telegraph would be replaced by the electric telegraph invented by Samuel Soemmering. In this case, 35 cables were used made up of gold electrodes with Water. The communication reached a distance of two thousand feet and could be identified by the amount of gas generated by the electrolysis.

In 1828 he reached USA the telegraph that sends electrical sparks through a tape of pre-treated paper to record symbols.

Meanwhile, with the advent of electromagnet and the improvement that in this sense would achieve Samuel Morse the telegraph would become a commercial and communicational success in the 19th century. In 1838 he made the first public demonstration of his invention, which consisted in the use of pulses of electricity. to move the electromagnet that in turn moved a marker that generated the codes written on a strip of paper, the famous code Morse.

In the year 1843, Morse, would obtain that the North American congress financed the first telegraphic line from Washington to Baltimore.
Little by little the system expanded fabulously and in 1861 the company Western Union built a mega telegraph company.