The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz (started in 1673, when he presented a wooden model to the Royal Society of London and completed in 1694). The name comes from the translation of the German term for its operating mechanism, Staffelwalze, meaning "stepped drum".
The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz (started in 1673, when he presented a wooden model to the Royal Society of London and completed in 1694). The name comes from the translation of the German term for its operating mechanism, Staffelwalze, meaning "stepped drum".
Source: Wikipedia "Stepped reckoner" · CC BY-SA 4.0
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