Mechanical calculator - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: Not HP Calculators (/forum-7.html) +--- Forum: Not remotely HP Calculators (/forum-9.html) +--- Thread: Mechanical calculator (/thread-2939.html) |
Mechanical calculator - Thomas Puettmann - 01-26-2015 10:34 PM Hi everybody, I have built a mechanical calculator with continuous carry from standard parts of the fischertechnik construction set, see http://youtu.be/9a_us8rMczw The Russian mathematician Chebychev (1812-1894) was the first who used an epicyclic gear train to obtain a continuous carry in his 1876 Arithmometer with 20 digits. Maybe it is of interest to some of you. Regards, Thomas RE: Mechanical calculator - Nina - 01-27-2015 08:15 PM beeindruckend! |