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André Galle
André Galle (27 May 1761, Saint-Étienne – 21 December 1844, Paris) was a French engraver and medallist. In 1829, he patented a type of roller chain, known as a leaf chain, which is still used for low-speed, heavy duty applications. It was not put into production during his lifetime. Biography André's father was an engraver who specialized in decorating rifles. Unable to support his family in Saint-Étienne, he relocated to Lyon Lyon (Franco-Provençal: ''Liyon'') is a city in France. It is located at the confluence of the rivers Rhône and Saône, to the northwest of the French Alps, southeast of Paris, north of Marseille, southwest of Geneva, Switzerland, north ..., where André became an apprentice in a button factory, but also received drawing lessons. His work attracted the attention of a local artist named Bergeon, who helped him gain admission to the Academy of Lyon. At the factory, his problem-solving and technical abilities led to his being named a partne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paris
Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of cities in the European Union by population within city limits, fourth-most populous city in the European Union and the List of cities proper by population density, 30th most densely populated city in the world in 2022. Since the 17th century, Paris has been one of the world's major centres of finance, diplomacy, commerce, culture, Fashion capital, fashion, and gastronomy. Because of its leading role in the French art, arts and Science and technology in France, sciences and its early adoption of extensive street lighting, Paris became known as the City of Light in the 19th century. The City of Paris is the centre of the Île-de-France region, or Paris Region, with an official estimated population of 12,271,794 inhabitants in January 2023, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
