antik.it/Antique-measuring-instruments/6093-Plane-table-1930s/
1533821682Code 6093 Plane table 1930sPlane table with telescope diopter model 5163/64 made by La Filotecnica Ing. A. Salmoiraghi S.A. Milano in about 1930, placed in its original oak wooden case with brass corners and complete with accessories. Box cm 55x20.5 h 15 - inches 21.65x8x5.9.
After having stayed and worked in different locations, in Piedmont, in Paris and Florence, Ignazio Porro (1801-1875), well-known scientist, professor of optics, inventor and precursor in the field of wide-angle lenses, settled in Milan and began teaching at Polytechnic. In Milan in 1865 he also founded a school-workshop specialized in the construction of topographic instruments together with Alessandro Duroni, pioneer of Italian photography, with the name of Filotecnica. On the death of Duroni, in 1871, Angelo Salmoiraghi, a pupil of Porro, already a very young soldier during the third war of independence against the Austrians, entered into society with his master and in 1877, after the Porro's death he bought the factory, which took the name of La Filotecnica Ing. A. Salmoiraghi, expanding its product range, producing mathematical instruments for drawing, astronomy, meteorology and navigation; the company builds, among other things, the first Italian sewing machine. During the First World War, it supplied war instruments, mainly aeronautics, and created a camera for aerial photography. In 1927 the company took the name of La Filotecnica Ing. A. Salmoiraghi S.A.. In 1939 Angelo Salmoiraghi died. During the Second World War a large part of the production was dedicated to war equipment and the company was therefore considered a war target: the factories are bombed, but at the end of the conflict the company manages to recover immediately. In the '70s it was bought by Dollond & Aitchinson, together with the firm Viganò, and became the Salmoiraghi Viganò, which in 2017 became the property of Luxottica.
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Antique measuring instruments
Code 6093 Plane table 1930s
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