Charpentier Calculator - Calculimetre G. Charpentier
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THE CALCULIMETRE CHARPENTIER, French, c.1900, signed "Calculimetre, G. Charpentier, Brevete S.G.D.G." The 2-3/8" (6 cm) diameter calculator is made of nickel silver and brass, divided with logarithmic, square root, tangent and sine scales on both sides, the suspension affixed to twin cursors and a frontal circular scale. A milled edge allows one to rotate the main body against this suspension assembly. Condition is fine, the surface somewhat cleaned and scratched. The Charpentier calculator, a fine pocket slide rule, is analogous to the Mannheim design but with circular scales. It was covered by a French patent, and by a British one in 1882, and was listed in American Keuffel & Esser catalogues from 1895 up to 1927. Despite this, surviving examples are relatively uncommon; here we are able to offer a good French example.Please ask any questions before bidding, I will answer promptly, to the best of my ability...or just make something up.Be assured your item will arrive safely, we are expert shippers.
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