Bollée

In 1889 the Frenchman Léon Bollée from Le Mans was awarded a gold medal at the Paris World Exhibition for his direct multiplying machine. Bollée solved the problem of the mechanical representation of the 100 numbers in the multiplication table up to ten in the form of a forest of rods of different heights on a base-plate. For every place of the setting mechanism, moveable along a rail, there was such a plate with rods. This machine was very heavy and only a small number of them were built. The importance of Bollée’s construction was revealed several years later with the appearance of the series-built ”Millionär” Calculating Machine of Otto Steiger, which is based on an adaptation of Bollée’s invention.