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In fax: Digital facsimile
Although the Group 2 fax machines proved to be successful in business applications where electronic transmission of documents containing nontextual information such as drawings, diagrams, and signatures was required, the slow transmission rate and the cost of the terminals ultimately limited the growth…
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TelAutograph

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TelAutograph

communications

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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.

digital facsimile

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TelAutograph