File:Leibniz Stepped Reckoner mechanism.png

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Leibniz_Stepped_Reckoner_mechanism.png ‎(775 × 293 pixels, file size: 93 KB, MIME type: image/png)

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English: Photo of the mechanism of the 'Stepped Reckoner' a prototype mechanical calculator invented by German mathematician Gottfried Wilhelm Leibniz in 1671 and completed in 1694. About 67 cm (26 in.) long. This was the first calculator able to perform all the elementary operations: addition, subtraction, multiplication, and division. The housing is removed to show the mechanism.

It consists of two parallel parts: the 16 digit accumulator section to the rear, and the 8 digit input section to the front. The input section is mounted on rails, and can be moved parallel to the accumulator with a crank and worm gear on the left end (the crank is removed and lying in the foreground), to align the digits of the operand with different digits of the accumulator. The 16 vertical wheels on the front of accumulator section are the output dials, with numbers 0-9 around their circumference that appear in windows in the top plate. The 8 shiny horizontal disks on the input section in front are the operand dials, with knobs for setting the operand into the machine. The crank on the front performs the calculation.

For more information see James Redin (2007) World of Calculators, A Brief History of Calculators Part 1: The Age of the Polymaths.
Date
Source Downloaded 2008-1-16 from Wilhelm Franz Meyer (1904) Encyklopädie der Mathematischen Wissenschaften mit Einschluss ihrer Anwendungen, Vol. 2 Arithmetic und Algebra, Druck und Verlag von E. G. Teubner, Leipzig, Germany, p.964, fig.11 on Google Books
Author Wilhelm Franz Meyer
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(Reusing this file)		 Public domain - Meyer died in 1934

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current11:30, 16 January 2008Thumbnail for version as of 11:30, 16 January 2008775 × 293 (93 KB)Chetvorno (talk | contribs){{Information |Description=Photo of the mechanism of the ''Staffelwalze'' (English 'Wikipedia:Stepped Reckoner') a prototype mechanical calculator invented by Wikipedia:Gottfried von Leibniz in 1674. |Source=Downloaded 2008-1-16 from [http://

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