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Sigmund Riefler
Sigmund Riefler (August 9, 1847 – October 21, 1912) was a German physicist, inventor and precision clockmaker.〔Riefler, Dieter: ''Riefler-Präzisionsuhren: 1890-1965''; Callwey Verlag; München 1991; ISBN 3-7667-1003-6〕〔''Dr. Sigmund Riefler''; by C. Dietzschold; Der Cornelius Nepos der Uhrmacher; Krems 1910; S.57.〕
== Life ==
Sigmund Riefler was born on August 9, 1847 to Magdalena and Clemens Riefler. He studied mathematics, geodesy and mechanical engineering at the Technical College in Munich and then physics and astronomy at the University of Munich. From 1870 he worked as an engineer in the Royal Prussian Land Survey, surveying land in Schleswig.〔''Precision Pendulum Clocks: France, Germany, America, and Recent Advances''; by Derek Roberts; 2004; ISBN 0-7643-2021-1〕
In 1876 after the death of his father, he took over the firm Clemens Riefler with his two brothers, Adolf and Theodor. Sigmund worked mainly on new developments in the area of drawing instruments and precision clocks, while his brothers handled the technical, sales and management of the company.
In 1878 he settled in Munich, to be in contact with the local scientific community.〔Erbrich, Klaus: ''Präzisionspendeluhren: von Graham bis Riefler''; Callwey Verlag; München 1978; ISBN 3-7667-0429-X〕 He invented the Riefler escapement which was patented in 1889.〔''Precision Pendulum Clocks: The Quest for Accurate Timekeeping''; by Derek Roberts; 2003; ISBN 0-7643-1636-2〕 He died in Munich on October 21, 1912 at the age of 65.
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