Cherepanovs

Cherepanov, Yefim Alekseyevich (1774–1842) and Miron Yefimovich (1803–1849), Russian inventors and industrial engineers, father and son. They were peasants of the Demidovs – a famous family of factory owners. In 1810s, Yefim built a progressive machine-building plant, equipped with a full range of innovative metal-cutting lathes (such as screw-cutters, gear-cutting serrating machines and others). From 1822 until his death, Yefim had been chief mechanic of all the factories in the town of Nizhny Tagil. His son Miron was his apprentice and in 1819 was appointed his deputy and eventually replaced his father after his death.