Stepped reckoner

（重定向自Stepped drum）

Drawing of a stepped reckoner from 1897 Meyers Konversations-Lexikon, showing a 12-digit version

Leibniz wheelIn the position shown, the counting wheel meshes with 3 of the 9 Leibniz wheel's teeth

The step reckoner (or stepped reckoner) was a digital mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz around 1672 and completed in 1694. The name comes from the translation of the German term for its operating mechanism, Staffelwalze, meaning 'stepped drum'. It was the first calculator that could perform all four arithmetic operations.

单词	Stepped drum
释义	Stepped drum 英语百科 Stepped reckoner （重定向自Stepped drum） The step reckoner (or stepped reckoner) was a digital mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz around 1672 and completed in 1694. The name comes from the translation of the German term for its operating mechanism, Staffelwalze, meaning 'stepped drum'. It was the first calculator that could perform all four arithmetic operations.
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