Image:Pascaline calculator front.png
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[edit] Summary
| Description |
Photo of a 'Pascaline', the mechanical calculator invented and manufactured by French scientist Blaise Pascal between 1642 and 1652. The device was made in various versions; this version was made for adding French currency. The wheels are marked with the denominations, from least significant on the right: deniers; sols (= 12 deniers); livres (= 20 sols); and then 10 livres; 100; 1,000; 10,000; to 100,000 livres on left. So the machine could represent up to 999,999 livres. To enter a digit in the device, a stylus was inserted between the appropriate wheel's spokes and the wheel was turned until it reached the stop at the bottom, like dialling a telephone. Each digit was entered in turn, and the sum would appear in the windows at top. The device could only add, and subtraction had to be done with nine's compliment addition. Alterations: deleted figure number, rotated image to justify, and increased brightness. |
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| Source |
Downloaded 2008-1-9 from J. A. V. Turck (1921) Origin of Modern Calculating Machines, Western Society of Engineers, Chicago, USA, p.10, fig.1 from Google Books |
| Date |
1921 |
| Author |
J. A. V. Turck |
| Permission (Reusing this image) |
Public domain - published in USA before 1923 |
[edit] Licensing
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1923. See this page for further explanation.
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This image might not be in the public domain outside of the United States (this especially applies in Canada, China (not Hong Kong, Macao, or Taiwan Area), Germany, Mexico, and Switzerland). The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details. |
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| Date/Time | Dimensions | User | Comment | |
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| current | 10:39, 15 January 2008 | 826×352 (55 KB) | Chetvorno | ({{Information |Description=Photo of a 'Wikipedia:Pascaline', the mechanical calculator invented and manufactured by French scientist Blaise Pascal between 1642 and 1652. The device was made in various versions; this versi) |
