Albert Lepetit
Coutureau optical square
This optical square was invented by Alfred-Alexandre Coutureau (1855-1929) ingénieur-géomètre in Saint-Cloud, France [6] and patented in 1885 in France (pat. 169887), in Luxembourg (pat. 604) and in Germany (DRP 36083). According to the 1890 Berthelemy catalogue, the Coutureau optical square was adopted for use by the Italian Cadastre [6].
Several (slightly different) versions are known: see Berthelemy 1890, Muret 1906, Morin 1910, and Secretan 1924. The optical square pictured at left [5] is identical to the 1922 version sold by Secretan in their 1924 catalogue [3].
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NOTES / RFERENCES
[1] Catalogue et Prix des Instruments de Mathématiques...A. Berthélemy 1890, page 3 and 12. Library University of Chicago.
[2] H. Morin; Catalogue Général 37th edition 1910-11, page 35. CNUM.
[3] Sécrétan Instruments de précision 1924, page 13. CNUM.
[4] Laussedat, Aimé; Recherches sur les instruments, les méthodes et le dessin topographiques, Gauthier-Villars, Paris 1898-1903.
[5] Charles Muret; Topographie: applications spéciales à l'agriculture; arpentage, nivellement, Cadastre 1906, p.69. Internet Archive.
[6] Alfred-Alexandre Coutureau, born 28 March 1855 - Flins-sur-Seine, 78410, Yvelines, Île-de-France, FRANCE; Deceased 4 March 1929 - Saint-Cloud, 92210, Hauts-de-Seine, Île-de-France, FRANCE, aged 73 years old; Buried in 1929 - Cimetière Concession 12 F bordure N°9013 - Saint-Cloud, 92210, Hauts-de-Seine, Île-de-France, FRANCE; Géomètre expert, Ingénieur, Topographe, Inventeur. [Geneanet]
TIMELINE
1845 Gambey's former apprentice Lorieux establishes a workshop with Schwartz: Schwartz dit Lenoir. Mörzer Bruyns; Sextants at Greenwich 2009, page 64.
1855 Baudry et Lorieux succeed Schwartz dit Lenoir. The company lasts about a year. Both makers are listed separately in subsequent years in the Paris Firmin-Didot Frères directories. Firmin-Didot Frères Annuaire général du commerce de l'industrie 1855, page 748. Google Books.
1880 Hurlimann acquires Lorieux. Archives Commerciales de la France 1880, No. 44, page 720. Gallica.
1895 Ponthus & Therrode is established. Archives Commerciales de la France 1895, No. 49, page 763. Gallica.
1895 Ponthus & Therrode acquire A. Berthelemy. Syndicat des constructeurs en instruments d'optique & de précision (France) 1901-1902. p.204-213. Smithsonian Libraries.
1900 Ponthus & Therrode acquire Maison A. Hurlimann. Syndicat des constructeurs en instruments d'optique & de précision (France) 1901-1902. p.204-213. Smithsonian Libraries.
1922 Albert Lepetit succeeds M. Ponthus, the workshop continues business until ca. 1950. Lepetit may have been active in the Ponthus & Therrode company from ca. 1915. La Ceramique et la Verrerie, 25th January 1922. Gallica. Archives Commerciales de la France 1929, 56e Annee, No. 9, page 406. Gallica.
1929 Frederick Lang becomes a partner in Etablissements Albert Lepetit. La Machine Moderne, Avril 1929, page 209. Gallica. La Machine Moderne, Avril 1929, page 209. Gallica.
1941 Leon Vindrier becomes partner, company is named A. Lepetit & Cie. Archives Commerciales de la France 1941, No. 70, page 1668. Gallica.
1950? Etablissements Roger Poulin succeeds Lepetit.