Telautograph
Analog precursor to the modern fax machine / From Wikipedia, the free encyclopedia
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The telautograph is an ancestor of the modern fax machine. It transmits electrical signals representing the position of a pen or tracer at the sending station to repeating mechanisms attached to a pen at the receiving station, thus reproducing at the receiving station a drawing, writing, or signature made by the sender. It was the first such device to transmit drawings to a stationary sheet of paper; previous inventions[1][2] in Europe had used a constantly moving strip of paper to make such transmissions and the pen could not be lifted between words. Surprisingly, at least from a modern perspective, some early telautographs used digital/pulse-based transmission while later more successful devices reverted to analog signaling.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/3/36/Telautograph-01.png/320px-Telautograph-01.png)