How it works
The telegraph was a very simple machine. It had 3 parts to it, battery, electromagnet, and the key to connect and disconnect those 2 parts. The length of the telegraph is controlled by the amount of wraps the wire goes around the electromagnet. Every time the key was tapped, a electrical pulse will go through the wire and wherever the reviving end is, the electrical pulse will create a beeping sound or a pattern on a moving roll of paper. The pattern on the paper is a dot or a dash, and the sound is played in long and short beeps. These pattern and sounds can be played in a certain way to represent a letter or number. This led the ability to send information and small text faraway at a very quick speed. The gears and mechanism found in some telegraphs is the machine that rolls out the sheet of paper that has the written dots and dashes.
Picture Bibliography
Electric Telegraph. irinventions, Wikispaces.net
http://irinventions.biss.wikispaces.net/file/view/How_electric_telegraph_works/234794704/How_electric_telegraph_works
Picture Bibliography
Electric Telegraph. irinventions, Wikispaces.net
http://irinventions.biss.wikispaces.net/file/view/How_electric_telegraph_works/234794704/How_electric_telegraph_works