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   Stepped Reckoner

   —-- Gottfried Leibniz The Liebniz Stepped Drum (or Step(ped) Reckoner, a translation of its German name Staffelwalze,) was a digital mechanical calculator invented by German mathematician and philosopher Gottfried Wilhelm Leibniz around 1672 and completed 1694.
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   Gottfried Leibniz

   This "Stepped Reckoner" attracted fair attention and was the basis of his election to the Royal Society in 1673.
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   Curta calculator

   The Curta's design is a descendant of Gottfried Leibniz's Stepped Reckoner and Thomas's Arithmometer, accumulating values on cogs, which are added or complemented by a stepped drum mechanism.
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   Timeline of artificial intelligence

   | 1672 | Gottfried Leibniz improved the earlier machines, making the Stepped Reckoner to do multiplication and division.
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   List of mathematics articles (S)

   ... Positivstellensatz -- Step function -- Step response -- Stepped Reckoner -- Stepwise regression -- Steradian -- Stereographic projection...
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   Timeline of computing 2400 BC–1949

   | 1671 | German mathematician, Gottfried Leibniz designed a machine which multiplied, the 'Stepped Reckoner'.
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   Pascal's calculator

   Child prodigy Gottfried Wilhelm Leibniz devised a competing design, the Stepped Reckoner, in 1672 which could perform addition, subtraction, multiplication and division; Leibniz struggled for forty years to perfect his design and produce sufficiently reliable machines.
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   Wilhelm Schickard

   It preceded the less versatile Pascaline of Blaise Pascal and Gottfried Leibniz's Stepped Reckoner by twenty years.
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   J. H. Müller

   He was also, in 1784, responsible for an improved adding machine based on principles of Leibniz's Stepped Reckoner.
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    Calculus ratiocinator

    Leibniz constructed just such a machine (picture picture2) for mathematical calculations which was also called a Stepped Reckoner.

Explore the following pages on Powerset:

• Stepped Reckoner,
• Gottfried Leibniz,
• Curta calculator,
• Timeline of artificial intelligence,
• List of mathematics articles (S),
• Timeline of computing 2400 BC–1949,
• Pascal's calculator,
• Wilhelm Schickard,
• J. H. Müller,
• Calculus ratiocinator