Directory
References

facsimile telegraph

communications

Learn about this topic in these articles:

uses

  • White House Telegraph Room, 1898
    In telegraph: The end of the telegraph era

    The facsimile telegraph was perfected in the 1930s and was widely used for sending photographs and other graphic information over telephone and telegraph lines in an analog transmission system. By the 1980s, however, analog facsimile was virtually replaced by the digital fax machine. In many offices,…

    Read More
Related Topics:
telegraph
fax

TelAutograph, short-line telegraph used to communicate handwriting and sketches. At the transmitter the motion of the pen or stylus traces out the material to be transmitted, and this motion is converted into electrical signals that are transmitted to the receiver. A pen or stylus at the receiver traces out the same motions as those of the transmitting pen, thus reproducing the writing or sketch. The TelAutograph was invented by Elisha Gray in the United States about 1895 and almost simultaneously in England by A.C. Cowper.

This article was most recently revised and updated by Robert Curley.