peoplepill id: friedrich-von-hefner-alteneck
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The basics
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Intro
German engineer
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was
Work field
Gender
Male
Place of birth
Aschaffenburg, Lower Franconia, Bavaria, Germany
Death
7 January 1904 (aged 58 years)
People who died on this day
Place of death
Biesdorf, Marzahn-Hellersdorf, Berlin, Germany
Age
58 years
The details (from wikipedia)
Biography
Friedrich Heinrich Philipp Franz von Hefner-Alteneck (April 27, 1845 in Aschaffenburg – January 6, 1904 in Biesdorf near Berlin) was a German electrical engineer and one of the closest aides of Werner von Siemens. He is largely remembered for the invention of the Hefner lamp, which provided the measure of luminous intensity used in Germany, Austria and Scandinavia from 1890 to 1942. The measure was called the Hefnerkerze (HK). The Hefnerkerze was superseded in the 1940s by the modern SI unit, the candela.
He was elected a member of the Royal Swedish Academy of Sciences in 1896.
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Friedrich von Hefner-Alteneck