Brunsviga
Brunsviga
The big breakthrough in mechanical calculators came with the invention of new mechanisms to
replace Leibnitz's stepped drum. Two men, in different parts of the world, created a variable-toothed gear: Frank S. Baldwin of the U.S. and T. Odhner, a Swede working in Russia. Both
Baldwin (1875) and Odhner (1874 ) machines were produced. In 1892, the firm of Grimme,
Natalis and Company A.G. of Braunschweig acquired the patents of the original Odhner pinwheel
machine, which it manufactured under the name of Brunsviga.