Otto Georg Lellep (29 September 1884[2] – 18 October 1975[3]) was an Estonian-born American inventor and metallurgical engineer.
Otto Lellep | |
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 | |
| Personal details | |
| Born | September 29, 1884 Viljandi, Estonia |
| Died | October 18, 1975 (aged 91) Fort Myers, Florida, United States |
| Profession | Inventor, engineer |
| [1] | |
Biography
editOtto Lellep was born on a farm near Viljandi, in 1884. He studied at the Tallinn Secondary School of Science, the Clausthal University of Technology and at the Technical University of Braunschweig where he received his doctorate.[1] In 1917 he went to the United States to pursue research on nickel mining. Although he had originally intended to return to Europe, he remained in the United States and was awarded American citizenship in 1923.[4]
While working as an engineer at Polysius, he invented the Lepol kiln,[5] which reduced the amount of energy that was needed to produce cement and the processing of iron ore.[6][2] (Lepol is a combination of Lellep and Polysius). In recognition of his engineering work, in 1960 he received, along with Robert Durrer the Carl Lueg Commemorative Medal from the Stahlinstitut VDEh.[7]
Selected publications
edit- 1930: Wärmetechnische Untersuchungen über den Wärmeaufwand beim Zementbrennen. Verbund-Rost-Drehofen, Dessau.
References
edit- ^ a b "Leidurist metseeni Otto Lellepi elutee Sai 90-aastaseks". Estniska Dagbladet (in Estonian). October 5, 1974. Retrieved July 28, 2022.
- ^ a b "Heidelberger Entwicklungsbeiträge zum Lepolofen" (PDF) (in German). HeidelbergCement AG. Retrieved July 28, 2022.
- ^ "Dr. Otto G. Lellep, Engineer, Inventor". The New York Times. October 20, 1975. p. 36. Retrieved July 28, 2022.
- ^ Günter Bauhoff (1985), "Lellep, Otto", Neue Deutsche Biographie (in German), vol. 14, Berlin: Duncker & Humblot, pp. 179–179; (full text online)
- ^ Zeiss, Betsy (May 5, 1972). "Retired Inventer One of Cape's Octogenarians". News-Press. Fort Myers, FL. p. 19. Retrieved March 4, 2023 – via Newspapers.com.
- ^ "Cement Kilns: Lepol Kilns". cementkilns.co.uk. Retrieved August 3, 2022.
- ^ Antek Schwarz: Stahl schreibt Geschichte. stahl und eisen 135 (2015) Nr. 10, S. 89–90.
Further reading
edit- Kesaya E. Noda (editor), The Unshakeable Faith of an Inventor: Otto G. Lellep: Remembering and Remembered. Brandt & Maher Publishing 2022. ISBN 978-1954744837.
External links
edit- Günter Bauhoff, "Lellep, Otto". Neue Deutsche Biographie 14 (1985), p. 179 Online-Version. (in German)