Mechanical Calculators

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Brunsviga 10

Marchant Figurematic

Marchant Figurematic 10ADX

Mechanical, electrically driven, very sophisticated machine capable of high-speed multiplication and division using a complex mechanism, unlike that of other mechanical calculators.

4 functions - addition, subtraction, automatic multiplication, automatic division.

The accumulator is the second row down and can show a result to 20 places of decimals.  The numbers entered can be to 10 places of decimals.

Made in the U.S.A., introduced about 1953.

For an in-depth description of the incredibly complex mechanism of a similar model in this range see "Marchant Figurematic - Technical Description" at John Wolff's Web Museum.

The machine above was photographed on a visit to the National Museum of Computing, Bletchley Park, UK.

Vintage Calculators

© Text & photographs copyright Nigel Tout   2000-2017  except where noted otherwise.