Odhner-type calculating machine, 1910-1920.
3 1 c m
actual image size: 32cm x 23cm

Odhner-type calculating machine, 1910-1920.

Richardson, Claire

© Science Museum / Science & Society Picture Library


Barrel calculating machines were smaller, lighter and easier to operate than their predecessors, Arithmometers. The machine performs multiplication by repeated addition and includes the wheel with a variable number of teeth as patented by Willgodt T Odhner (1845-1905) in 1891. Made by the Muldivo Calculating Machine Company and engraved 'Unis France, no 9697'.



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