Write telegraph
When writing telegraph is called a telegraph machine that simulates a write operation. For this purpose, a pen, wheel or spiral is drawn with ink over paper. Usually, a strip of paper is moved under the writing instrument. In the simplest case, the write telegraph writes down a technical code. The first usable telegraph was the device from Carl August von Steinheil .
The writing telegraph by Samuel Morse , known as the Morse machine, found worldwide distribution. The patent was granted by the United States Patent and Trademark Office on June 20, 1840.
How the Morse code works
The Morse code consists of an electromagnet with a movable armature, the lever of which generates dots and lines on a strip of paper passed by a clockwork. In the relief writers this was done by a steel pin attached to the free end of the armature lever, which, as soon as the armature was attracted by the electromagnet, pressed against the paper strip drawn between two rollers of the drive and left behind shorter or longer impressions, depending on the case whether the button used to close the battery was pressed for a moment or for a long time.
Since the end of the 19th century, Morse code machines have been used primarily as color pens , in which the lever movement of the anchor is used to press the paper strip against a color wheel or, conversely, a color wheel against the paper strip.
Telegraph relays were used to bridge greater distances between telegraphs .
literature
- NA Jordan: State-of-the-art physics plan . Published by Julius Springer, Berlin 1898.
- Arthur Wilke, Willi Hechler: The electricity, its generation and its application in industry and commerce . Springer Verlag Berlin Heidelberg GmbH, Berlin Heidelberg 1914.
See also
Web links
- Writing telegraph (Morse) , Institute for Telecommunications, accessed on March 21, 2016
- Samuel Morse changed the world in three notes , accessed on March 21, 2016