19th Century Theodolite Ing A. Salmoiraghi Milano Antique Surveyor Measurement

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19th Century Theodolite Ing A. Salmoiraghi Milano Antique Surveyor Measurement

About the Item

Great Cleps signed Ing. A. Salmoiraghi La Filotecnica Milano n. 6465; the instrument was conceived by Ignazio Porro (1801-1875) and made around the end of the nineteenth century. It is an instrument used for geodetic and topographical measurements. This tacheometer differs from other tacheometers because the graduated circles are not visible but protected from dust and the reading is done through microscopes. The instrument is complete with its original box with accessories. Measures box 7.5x28.5x20 cm. Very good condition and fully functional. 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.

Dimensions:
Height: 15 in (38.1 cm)Width: 19.5 in (49.53 cm)Depth: 8.75 in (22.23 cm)
Materials and Techniques:
Brass
Period:
1870-1879
Date of Manufacture:
1870
Condition:
Wear consistent with age and use.
Seller Location:
Milan, IT
Reference Number:
1stDibs: LU1020229867182