Carl Emil Krarup
Carl Emil Krarup ( born October 12, 1872 in Copenhagen, † December 30, 1909 ) was a Danish engineer who worked in the telegraph beings.
His parents were the textile factory dealer Thure Krarup Frederik (1799, Borris - 1863, Copenhagen) and Cathrine Vilhelmine Brochorst ( 1805-1862 ). His older brother was named as the father Thure Krarup Frederik ( 1868-1928 ).
Carl Emil Krarup visited the higher public school, studied from 1890 in Christianshavn philosophy and changed the following year to an engineering education, which he finished in 1896 as a civil engineer. Initially he worked as an assistant at his former university.
He then became a senior engineer in Copenhagen Office for roads and sewers, and was responsible for the technical equipment. In 1898 he joined as a technical engineer aspirant on the state telegraph services, rose to become head of the telegraph station of Fredericia and on to the head of the telegraph workshops in Copenhagen.
1901, the Authority sent him to the Physics Institute of the University of Würzburg on a study visit, where he experimented on eisenumwickelten copper conductors. JS Stone by AT & T in 1897 such a patented ( U.S. Patent No. 578.275 ). Franz Breisig had in 1901 proposed an iron- wrapping with an open helix. Krarup experimented with closed spirals. In time, the University of Copenhagen had written a prize essay on the self-induction electric lines. Krarup participated in the competition and published in March 1902 at the University of Copenhagen a treatise for which he obtained the second prize. About his award, he fell into conversation with Pedersen (Paul Ole Peder Oluf Pedersen or? ), Who was convinced that Krarup be with his proposal on the right path, and promoted him. The company Felten & Guilleaume made a first, 4 km long cable according to his statement, which was routed through the Oeresund between the Danish and Swedish Helsingborg and Elsinore went into operation on 18 November 1902. On December 1, 1902 Krarup was appointed telegraph engineer.
From 1902 to 1906 he was employed as Director of Staatstelegrafie. From 1903 to 1905 he contributed Assistance in setting up the radio telegraphic connection with Iceland. In 1903 he taught in the further development of the Norwegian telegraph being a radio telegraph communication with the Lofoten Islands. He designed and built telephone exchanges, for example, in 1906 the Faroe Islands and in 1908 in the Russian Baku.
On 23 August 1904 he married.
The Krarupkabel found wide use until about 1935. Their production was relatively expensive, so they were displaced by the Gustav Elmen from 1924 made permalloy cable with higher inductance and by the 1920 -built Pupin coils.
Swell
- Personality of Electrical Engineering
- Dane
- Born in 1872
- Died in 1909
- Man