Christel Hamann
   HOME

TheInfoList



OR:

Christel Bernhard Julius Hamann (born February 27, 1847 in Hammelwarden,
Oldenburg Oldenburg may also refer to: Places *Mount Oldenburg, Ellsworth Land, Antarctica *Oldenburg (city), an independent city in Lower Saxony, Germany **Oldenburg (district), a district historically in Oldenburg Free State and now in Lower Saxony *Olde ...
– died June 9, 1948 in Berlin, Germany) was a German-born inventor of Computing Machines.


Early life and education

Hamann's father was an Oldenburg border guard and ambassador in Ellwitz. Hamann completed an apprenticeship as a mechanic at the Nautical Institute in Bremerhaven and visited the pilot school there. Afterwards he attended the mathematical-mechanical institute of A. Ott in
Kempten Kempten (, (Swabian German: )) is the largest town of Allgäu, in Swabia, Bavaria, Germany. The population was about 68,000 in 2016. The area was possibly settled originally by Celts, but was later taken over by the Romans, who called the town ' ...
(Allgäu) in the workshops of
Carl Zeiss Carl Zeiss (; 11 September 1816 – 3 December 1888) was a German scientific instrument maker, optician and businessman. In 1846 he founded his workshop, which is still in business as Carl Zeiss AG. Zeiss gathered a group of gifted practica ...
in
Jena Jena () is a German city and the second largest city in Thuringia. Together with the nearby cities of Erfurt and Weimar, it forms the central metropolitan area of Thuringia with approximately 500,000 inhabitants, while the city itself has a po ...
and in the workshop of
Carl Bamberg Johann Carl Wilhelm Anton Bamberg (born 12 July 12, 1847 in Kranichfeld, died 4 June 1892 in Friedenau) was a German engineer and entrepreneur. He began his career as an apprentice at Carl Zeiss. In 1871 he founded his own company, manufacturing ...
in Berlin.


Career

In 1896 he founded the Mathematical-Mechanical Institute in Berlin-Friedenau, where he developed and built mathematical instruments and surveying instruments. In 1900, he received the gold medal for his instruments at the World Exposition in Paris. Around 1889 he developed the calculation machines Gauss and Berolina inspired in part by the Gauss computing machine of
Gottfried Wilhelm Leibniz Gottfried Wilhelm (von) Leibniz . ( – 14 November 1716) was a German polymath active as a mathematician, philosopher, scientist and diplomat. He is one of the most prominent figures in both the history of philosophy and the history of math ...
and the stepped reckoner drum. In 1907, his institute was taken over by Mercedes Büromaschinen in Berlin. There, he designed the ''Mercedes Euklid'' computing machine with the Proportional Lever principle developed by Hamann. He also improved machines for accounting. In 1909 he built a difference engine. From 1922 he worked for Deutsche Telephonwerke und Kabelindustrie in Berlin (DeTeWe). From 1925 onwards, he developed the shifting system as a propulsion system for computing machines. As chief designer, Christel Hamann and his colleague Heinrich Wilhelm created the essential foundations for the DeTeWe computing machines built as far back as the 1960s, Before the electronics displaced the electromechanics. In 1933 he became an honorary doctor at the TH Berlin. He was married to Hedwig Schindler (1872–1949) but had no children.


References

* Rolf Stümpel (Editor): ''Büromaschinen from Berlin'', Museum of ''Transport and Technology'', Berlin 1988 * Hartmut Petzold, ''Modern composer. The Industrialization of Computing Technology in Germany'', CH Beck 1992 * Petzold ''Computing Machine'', VDI Verlag 1985 * Ulf Hashagen, ''The computing machine Gauss – a failed innovation? '', In U. Hashagen, O. Blumritt, H. Trischler (Editor) ''Circa 1903: Scientific and technical artefacts in the founding period of the German Museum'', Munich, 2003, pp. 371–98 * Werner Lange, ''The work of Christel Hamann'', The Büromaschinen-Mechaniker, Issue 11, May 18, 1960, pp. 83–85 * Werner Lange, ''A brief look into the Hamann calculation machines'', the office machine mechanic, issue 19, 1960, p. 245–46, issue 23, 1961, p. 65–66, issue 27, 1961, p. 168–69, issue 68, 1964, p. 186–88 * Werner Lange ''An interesting outsider: Hamann computing machines'', the office machine mechanic, issue 127, 1969, p. 66 – 67 * Heinz Nix's profile:
Hamann, Christel Bernhard Julius.
'In: '' New German Biography'' (NDB). Vol. 7, Duncker & Humblot, Berlin 1966, , p. 573
digitalisat
. * Reese, Martin: Personal: The Unknown Chr. Hamann. In: Historische WBürowelt, No. 97 (Sept. 2014), pp. 11–18. See IFHB.


External links


Article Hamann in Rechnerlexikon





Weiss, the calculating machine Gauss, original and model
(pdf) {{DEFAULTSORT:Hamann, Christel 20th-century German inventors German centenarians Men centenarians 1847 births 1948 deaths People from Lower Saxony