The Arithmometers of Thomas de Colmar & Payen


What is new ?

Article in "mechanical arts: journal of the Association Nationale des Collectionneurs de Machines à Ecrire et à Calculer

Discover in a few minutes
Discovery of a new prototype !!

1 » What is an arithmometer
2 » How is it working
3 » See videos

Demonstration models
How many has survived ?
Sn 1316 modified
The mystery of Serial numbers
Instruction manuals
Videos & Simulations

How the arithmometer works : Video-modelisation by Michael L. Hilton (10mn)

T1820 project
Project 1820
Modelisation with Catia is also:

A true digital library !
Data base !
Arithmomètre Thomas de Colmar
Anatomy section !
What about the models !
Long live the museums !
Thomas de Colmar


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