August Ebeling

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August Ebeling (born August 31, 1859 in Schöpfurth near Eberswalde , † January 16, 1935 in Berlin-Charlottenburg ) was a German physicist and engineer.

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August Ebeling was the son of the master carpenter August Ebeling (1821–1905) and Bertha Kühne (1831–1924). He himself married Hedwig Messerschmidt (1875–1947) in 1897, with whom he had a son and two daughters.

Ebeling visited universities in Freiburg im Breisgau and Berlin, while listening to Hermann von Helmholtz and Ferdinand von Richthofen . After graduating as Dr. phil. in 1884 he passed the state examination. Then he worked briefly at the Realgymnasium in Berlin. In 1889 he switched to Siemens & Halske and worked there until 1892 in a laboratory headed by Werner von Siemens . After receiving a call from his former Helmholtz teacher, he moved to the Physikalisch-Technische Reichsanstalt , where he directed magnetic work. In 1897 he went back to Siemens & Halske and headed the department for low-voltage cables. His main task was to develop high-performance telephone cables for long-distance traffic. At the turn of the century, he recommended his employer to buy European licenses for Mihajlo Idvorski Pupin 's patents. Pupin had described a method that allowed telephone connections over greater distances with the help of self-induction coils. The practical implementation of Pupin's method turned out to be difficult. Ebeling solved the problems together with Friedrich Dolezalek in the course of extensive research. The developed Pupin coils enabled better transmission of higher frequencies over great distances and led to a more natural voice transmission via cable, which had previously been dull.

From 1901 to 1903, Ebeling was in charge of work on a post cable that, based on Pupin's coils, established the first telephone connection between Berlin and Potsdam. In 1906 he first laid a Pupin's coil through Lake Constance , which, as a deep-sea cable , connected Friedrichshafen with Romanshorn . The cables were subjected to a pressure load of up to 25 atm. exposed. Due to the successfully installed telephone connections, Siemens & Halske received the order in 1912 to install the Rhineland cable, which ran from Berlin to Cologne . The work on the connection, which is important for the economy, was completed after the end of the First World War . After that, an extensive telephone network was created throughout Europe.

In 1921 Ebeling succeeded von Eicken as head of the Siemens cable plant in Berlin-Gartenfeld. In the following year he took over the management of the Siemens cable community and thus the entire cable and line area of ​​the company. In the same year he became a deputy member of the board of directors of Siemens & Halske AG and Siemens-Schuckertwerke GmbH. From 1925 to 1929 he was a regular member of the committees. From its foundation in 1921 until the end of his life, he also had a seat on the supervisory board of the Deutsche Fernkabel Gesellschaft . The Technical University of Danzig made him an honorary doctor of engineer in 1922.

literature

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Individual evidence

  1. ↑ a b c d Sigfrid von Weiher:  Ebeling, August. In: New German Biography (NDB). Volume 4, Duncker & Humblot, Berlin 1959, ISBN 3-428-00185-0 , p. 218 f. ( Digitized version ).
personal data
SURNAME Ebeling, August
BRIEF DESCRIPTION German physicist and engineer
DATE OF BIRTH August 31, 1859
PLACE OF BIRTH Schöpfurth near Eberswalde
DATE OF DEATH January 16, 1935
Place of death Berlin-Charlottenburg