English: A Telautograph receiver (top) and transmitter (bottom) with cover removed, of the design pioneered by Foster Ritchie, using analog currents over two circuits to transmit the pen position of a transmitter to the receiver and reproduce writing or drawing. The pen controls two rheostats (one seen as partially obscured sector shaped object, bottom left) through two linkage bars and two pen crank bars. The analog currents which result are sent to two D'Arsonval type pen motors, each visible in the receiver with its two large field electromagnet windings and curved pole pieces. These in turn drove the receiver pen cranks to the same angle as those at the transmitter by balancing the motor force against spiral springs, and the pen cranks then moved the receiver pen to the same position as the transmitter pen, reproducing writing. An AC current was sent over the line wires to lower the pen to the paper, and probably also had the effect of adding mechanical dither to the system and overcoming static friction (as claimed by American based contemporary George S Tiffany in patent US668889). Automatic switching devices connected the telautograph to the line wires when the telephone was not in use.

Also called a Telewriter by Ritchie once in commercial use in the UK and Germany.

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