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1 Stumpf, Johann
SUBJECT AREA: Steam and internal combustion engines[br]fl. c. 1900 Germany[br]German inventor of a successful design of uniflow steam engine.[br]In 1869 Stumpf was commissioned by the Pope Manufacturing Company of Hertford, Connecticut, to set up two triple-expansion, vertical, Corliss pumping engines. He tried to simplify this complicated system and started research with the internal combustion engine and the steam turbine particularly as his models. The construction of steam turbines in several stages where the steam passed through in a unidirectional flow was being pursued at that time, and Stumpf wondered whether it would be possible to raise the efficiency of a reciprocating steam engine to the same thermal level as the turbine by the use of the uniflow principle.Stumpf began to investigate these principles without studying the work of earlier pioneers like L.J. Todd, which he later thought would have led him astray. It was not until 1908, when he was Professor at the Institute of Technology in Berlin- Charlottenburg, that he patented his successful "una-flow" steam engine. In that year he took out six British patents for improvements in details on his original one Stumpf fully realized the thermal advantages of compressing the residual steam and was able to evolve systems of coping with excessive compression when starting. He also placed steam-jackets around the ends of the cylinder. Stumpf's first engine was built in 1908 by the Erste B runner Maschinenfabrik-Gesellschaft, and licences were taken out by many other manufacturers, including those in Britain and the USA. His engine was developed into the most economical type of reciprocating steam engine.[br]Bibliography1912, The Una-Flow Steam Engine, Munich: R. Oldenbourg (his own account of the una-flow engine).Further ReadingH.W.Dickinson, 1938, A Short History of the Steam Engine, Cambridge University Press; R.L.Hills, 1989, Power from Steam. A History of the Stationary Steam Engine, Cambridge University Press (both discuss Stumpf's engine).H.J.Braun, "The National Association of German-American Technologists and technology transfer between Germany and the United States, 1844–1930", History of Technology 8 (provides details of Stumpf's earlier work).RLH -
2 Steam and internal combustion engines
See also: INDEX BY SUBJECT AREA[br]Giffard, Baptiste Henry JacquesHamilton, Harold LeePorta, Giovanni Battista dellaBiographical history of technology > Steam and internal combustion engines
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Stumpf — may refer to:People* Johann Walter (Hans) Stumpf (musicologist), Master Pipe Organist, German Immigrant * John Stumpf, President and CEO of Wells Fargo * Bernd Stumpf * Bill Stumpf * Carl Stumpf * Johann Stumpf (writer), a 16th century Swiss… … Wikipedia
Johann Stumpf — may refer to: *Johann Stumpf (writer), a 16th century Swiss writer *Johann Stumpf (engineer), a 19th century German engineer … Wikipedia
Johann Stumpf (engineer) — Johann Stumpf of the Charlottenburg Technical College in Berlin is best known for popularising the uniflow steam engine, in the years around 1909, and his name has always been associated with it. The basic uniflow principle had been invented many … Wikipedia
Johann Stumpf (writer) — Johann Stumpf (1500 1578) was an early writer on the history and topography of Switzerland.He was born at Bruchsal (near Karlsruhe), and was educated there and at Strasbourg and Heidelberg. In 1520 he became a cleric or chaplain in the order of… … Wikipedia
Johann Valentin Andreae — (* 17. August 1586 in Herrenberg; † 27. Juni 1654 in Stuttgart) war ein deutscher Theologe, Schriftsteller und Mathematiker mit großem Einfluss auf den württembergischen … Deutsch Wikipedia
Johann Valentin Andreä — Johann Valentin Andreae Johann Valentin Andreae (* 17. August 1586 in Herrenberg; † 27. Juni 1654 in Stuttgart) war ein deutscher Theologe, Schriftsteller und Mathematiker mit großem Einfluss auf den württembergischen … Deutsch Wikipedia
Johann Heinrich Werdmüller — 1742 1814, eigenhändiger Kupferstich Johann Heinrich Werdmüller (* 1742 in Jonen; † September 1814 in Zürich) war ein Schweizer Maler, Zeichner, Radierer und Schriftsteller … Deutsch Wikipedia
Johann August (Pfalz-Lützelstein) — Johann August von Pfalz Lützelstein (* 26. November 1575 auf Burg Lemberg; † 18. September 1611 auf Burg Lemberg) war Pfalzgraf von Lützelstein. Leben Johann August war der zweite Sohn des Pfalzgrafen Georg Johann I. von Veldenz (1543–1592) aus… … Deutsch Wikipedia
Johann Heinrich Tonsor — (* 14. März 1595 in Igstadt bei Wiesbaden; † 1. Dezember 1649 in Gießen) war ein deutscher Philosoph und lutherischer Theologe unter dem Einfluss der Scholas … Deutsch Wikipedia
Johann Adolph Pöppelmann — (* 3. August 1694; † 2. Januar 1773 in Dresden) war ein deutscher Hofmaler. Der älteste Sohn des Hofbaumeisters Matthäus Daniel Pöppelmann und dessen Ehefrau Catharina Margaretha geborene Stumpf hielt sich seit 1724 am kurfürstlich sächsischen… … Deutsch Wikipedia
Stumpf [3] — Stumpf, 1) Johann, geb. 1500 zu Bruchsal im Speyersehen, war reformirter Pfarrer u. Dekan in Stainheim u. st. 1566 in Zürich; er schr.: Chronik von der Schweiz (fortgesetzt von seinem Sohne Rudolf bis 1586 u. dann von Maserus bis 1606);… … Pierer's Universal-Lexikon
