|
"Theoretically this machine could handle the four arithmetic functions, had delayed carrying device, and contained the stepped drum principle, which 150 years later was used in the first commercially successful calculator. ... Leibniz's "Stepped Reckoner"; 1674...
|
www.xnumber.com/xnumber/pic_reckoner.htm
www.xnumber.com/xnumber/pic_reckoner.htm
|
|
|
|
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.
|
en.wikipedia.org/wiki/File:Leibniz_Stepped_Reckoner_mec...
en.wikipedia.org/wiki/File:Leibniz_Stepped_Reckoner_mechanism.png
|
|
|
|
Photo of Leibniz' Stepped Reckoner. 619 x 213 (43Kb) ... This image is believed to be public domain. If you believe you own the rights to this image, please contact me and the image will be either accredited or withdrawn. ... If you wish to use this image on another Web site, please feel free to so without any further permission...
|
www.kerryr.net/pioneers/gallery/ns_leibniz4.htm
|
|
|
Diagram of Leibniz' Stepped Reckoner. 422 x 463 (47Kb) ... ; Diagram of Leibniz' Stepped Reckoner;
|
www.kerryr.net/pioneers/gallery/ns_leibniz6.htm
|
|
Leibniz developed Blaise Pascal s ideas and, in 1671 , introduced the Step Reckoner (aka the Stepped Reckoner), a device that, as well as performing additions and subtractions, could multiply, divide, and evaluate square roots by a series of stepped additions. ... (aka the '''Stepped Reckoner'''), a device that,
|
www.seattleluxury.com/encyclopedia/entry/HIV/Stepped_Re...
www.seattleluxury.com/encyclopedia/entry/HIV/Stepped_Reckoner
|
|
“ |
Stepped Reckoner In the 1670s, German Baron Gottfried von Leibniz took mechanical calculation a step beyond his predecessors. Leibniz, who entered university at fifteen years of age and received his bachelor's degree at seventeen, once said...
http://wiki.answers.com/Q/About_Stepped_Reckoner
|
|
The Leibniz Step Reckoner (or Stepped Reckoner) was a digital mechanical calculator invented by German mathematician and philosopher Gottfried Wilhelm Leibniz around 1672 and completed 1694.[1] The name comes from the translation of the German term for its operating mechanism;
|
freewikimedia.com/en/wiki/Stepped_Reckoner.html
freewikimedia.com/en/wiki/Stepped_Reckoner.html
|
|
His devise, the stepped reckoner, included a cylindrical wheel called the Leibniz wheel and a moveable carriage that was used to enter the number of digits in the multiplicand. It also held great promise, but it did not work because of mechanically unreliable parts that tended to jam and malfunction.
|
www.nuhsd.k12.ca.us/brhs/faculty/Stephan/history/hsitor...
www.nuhsd.k12.ca.us/brhs/faculty/Stephan/history/hsitory4.html
|
|
Britannica online encyclopedia article on Step Reckoner (calculating machine), a calculating machine designed (1671) and built (1673) by the German mathematician-philosopher Gottfried Wilhelm von Leibniz. ... The Step Reckoner[Credits : IBM Archives]
|
www.britannica.com/EBchecked/topic/725529/Step-Reckoner
www.britannica.com/EBchecked/topic/725529/Step-Reckoner
|
|
