Joseph Finkey

* Sárospatak, November 27, 1889 – † Sopron, April 7, 1941 / mining engineer, university professor, full member of the Hungarian Academy of Sciences (1940) ; ; He completed his secondary school studies in his hometown, at the Reformed College (1907). He graduated from the Selmecbánya College in 1911, and after completing a two-year practical period, he took the state examination in 1913. Between 1914 and 1918, he was a lecturer at the Selmec College, while also performing military service. After the change of empire, he contributed to the relocation of the Selmec College to Sopron and continued his teaching and research activities there. In the 1920s, he developed a special method of the wet flotation process, which could be used to increase the efficiency of extracting gold, especially in copper ores and pyrite. His major work, Die wissenschaftlichen Grundlagen der nassen Erzaufbereitung [Scientific foundations of wet ore preparation], published in Berlin in 1924, was translated into English, Spanish and Russian (it was used as a university textbook in the USA and the Soviet Union). In 1931, he created the Finkey air filter for the upgrading of Hungarian brown coal. ; ; Major works: ; The Scientific Fundamentals of Gravity Concentration (University of Missouri, Rolla, Technical Series), 1927, ; Briquetting of mineral structures, 1930, ; New experimental data on the briquetting of domestic coals (Mathematics and Termology), 1935, ; Grundriss der Theorie des Flotationverfahrens (Mining and Refining Engineering Department) 1936), ; Basic mechanical equations of pneumatic coal preparation (MTA Ért., also in German), 1938, ; Magnetic separation of reduced bauxites (Mining and Metallurgical Papers), 1939, ; Evaluation of flotation diagrams (academic chair holder), 1940.