Otto Hetzer (born February 11, 1846 in Kleinobringen near Weimar ; † January 18, 1911 in Weimar; full name: Karl Friedrich Otto Hetzer ) was a German master carpenter (from 1891 grand ducal court carpenter ) and entrepreneur in Weimar in Thuringia. At the beginning of the 20th century, his inventions helped glued wood construction to achieve an industrial breakthrough. At his former place of work in Weimar, a historic Hetzer hall is a listed building and bears a plaque to Otto Hetzer.
Live and act
Otto Hetzer was the son of the farmer Ernst Adam Hetzer and his wife Friederika Caroline Charlotte, née Götze. On February 22nd, 1846 he was baptized in the church of the Evangelical Lutheran community of Kleinobringen.
On November 7, 1872 he married Dorothea Elise Caroline Marie b. Hallbauer (born February 15, 1848 - † May 22, 1915) from Weimar. She was the daughter of master baker Franz Wilhelm Hallbauer and his wife Karoline Wilhelmine Sophie, née Lindner. The sons Carl Paul (1873–1937), Alfred Otto jun. (1876–1937) and Kurt Ehrig (1882–1906). Christian Müller (see literature) mentions the three sons Otto Alfred Hetzer (around 1921 director of the Christoph & Unmack company in Niesky in Lusatia), Karl Paul Hetzer and - notwithstanding the above - Walter Ernst Hetzer .
On July 20, 1870, he joined the Thuringian Infantry Regiment No. 94 “Grand Duke of Dessau”. During the Franco-Prussian War , Hetzer was so badly injured by a shot through his left hand in the Battle of Wörth that he was subsequently classified as permanently incapacitated and from April 1, 1893 was awarded a permanent pension with a "mutilation allowance".
In 1872 Otto Hetzer founded his first company , from small beginnings it developed into a wood processing company that had around 300 employees at peak times (company end in 1926) and was therefore important as an employer and taxpayer for the city of Weimar . It existed from 1883 under the company Weimar Bau- and Parquet Flooring Factory Otto Hetzer until it was converted into a stock corporation in 1901 for further expansion . The articles of association were signed on December 28, 1901, and Otto Hetzer Holzpflege und Holzverarbeitung Aktiengesellschaft was registered as a stock corporation at the Grand Ducal Saxon District Court on December 31, 1901.
In 1901, Otto Hetzer's son Otto Alfred Hetzer (1876–1937) joined the company and became commercial and technical manager and deputy of the sole director and, from 1903 to 1909, overall director of Otto Hetzer AG.
In a brochure in 1910 entitled Otto Hetzer Weimar - New wood construction , the company at 20 German and foreign cited patents , the roof constructions and structures concern. This means that Otto Hetzer is still considered to be the authoritative founder of glued wood construction.
For the Brussels World Exhibition in 1910 Otto Hetzer - under the responsibility of his son Otto Alfred Hetzer - built a cantilevered exhibition hall for the Reichseisenbahnen with a span of 43 meters (temporary structure) designed by the architect Peter Behrens from Berlin, which received two awards for its solid and innovative design. In mid-1910 he withdrew from the stock corporation - together with his son Otto Alfred Hetzer. The reason for this was the disloyal behavior of the management board towards itself.
Patents from Otto Hetzer
- 1892 German Reich Patent Office (DRP). 63018: floor
- 1900 DRP. 125895: Composite I-timber beam
- 1903 DRP. 163144: Parabolically composed bar
- 1906 DRP. 197773: Curved wooden component
- 1907 DRP. 225687: timber truss
Patents from Otto Hetzer AG
- 1920 DRP. 3239912: Multi-lamella beam
Awards and honors
- July 30, 1891: Appointment as Grand Ducal Court Carpenter
- October 1896: Certificate of honor from the Berlin trade fair
- August 29, 1898: Certificate for the centenary medal for the 100th birthday of Kaiser Wilhelm I.
- July 28, 1908: Certificate for the Silver Cross of Merit of the Grand Ducal House Order
Karl Friedrich Otto Hetzer
1846 - 1911
Grand Ducal Court Carpenter
Founder of modern glued wood construction
The memorial plaque is attached to the north side of the so-called small Hetzerhalle on the former factory premises in Weimar, at the freight yard, behind Marcel-Paul-Straße 57.
- Christian Müller: Development of glued wood construction with special consideration of the inventions of Otto Hetzer - a contribution to the history of construction technology. Bauhaus-Universität Weimar , dissertation, Weimar 1998. Retrieved on October 17, 2019 .
- Hermann Wirth: Otto Hetzer - Address on the occasion of the consecration of a memorial plaque on October 21, 2004. Memento from otto-hetzer.ch at web.archive.org, March 13, 2011. Retrieved October 17, 2019 .
- Charles von Büren: Glued wood construction - a success story: 100 years of the Hetzer patent - On June 22, 1906, master carpenter Karl Friedrich Otto Hetzer received the German Imperial Patent No. 197773 for curved, glued laminated beams made of two or more lamellas. That was the hour of birth of modern timber engineering. Media release from the Swiss Working Group for Wood Research (SAH), Dübendorf, June 2005 as a memento from otto-hetzer.ch at web.archive.org, September 21, 2018. Accessed October 17, 2019 .
- Wolfgang Rug: 100 years of the Hetzer patent , with biographical information on Otto Hetzer senior and Otto Hetzer junior, accessed on October 17, 2019
- To the introduction and the sections: Life and Work; Awards and honors: Otto Hetzer, Weimar City Archives, signature: 58 4/60
- Notification of death for No. 36/1911: Weimar City Archives, call number: 27 4/5
- Weimar Death Register No. 315/1915: Weimar City Archives, call number: 27 2/3
- Weimar birth register No. 74/1882: Weimar City Archives, call number: 27 2/1
- Karl Friedrich Otto Hetzer: City Archives Weimar, signature: 63 4 / Hetzer
- Christian Müller: Development of glued wood construction with special consideration of the inventions of Otto Hetzer - a contribution to the history of construction technology. Bauhaus-Universität Weimar , dissertation, Weimar 1998. Retrieved on October 17, 2019 . , Page 26 (pdf)
- Sachsen-Weimar-Eisenachisches Amtsgericht Weimar, signature: 1; Weimar State Archives , holdings number: 6-13-3648
Otto Alfred Hetzer , also: Otto Hetzer Junior , * December 1, 1876 in Weimar - † September 9, 1937 in Berlin.
- Apprenticeship / studies: 1887 After graduation, practical work as a bricklayer and carpenter, 1897–1901 studied architecture at the TH Berlin-Charlottenburg, 1901 technical assistant in his father's company
- Professional career: 1901 joined his father's company, 1901 commercial and technical manager, 1901–1903 deputy director, 1903 co-founder of the headquarters of Deutsche Parettfabriken, 1903–1909 full board member of Otto Hetzer AG, 1906–1910 founder and chairman of the Central German Parquet Association , 1909 responsible for the construction of the railway hall for the Brussels World Exhibition, 1910 Brussels World Exhibition, left Otto Hetzer AG in mid-1910 together with his father because of the disloyal behavior of the board towards his father; 1910 Director of the oldest German parquet factory Robert Manns, Ilfeld / Harz, 1914–1917 Participation in the First World War, 1919–1922 Director for hall construction at Christoph & Unmack in Niesky, 1922–1927 First Director and technical board member of Gustav Richter AG for Hoch -, civil and reinforced concrete construction Plauen, wooden halls and housing developments, 1927–1930 director and head of the advertising department of the Aktiengesellschaft für Bauausführung, Berlin, for the head office in Berlin and for all branches in Germany, 1930–1933 advertising for the Parquet Union in Berlin and for the Kelheim parquet factory.
- Various publications and lectures on self-supporting wooden structures.
- 100 years of the Hetzer patent , pdf, p. 4 (original p. 536)
- http://otto-hetzer.de/files/100%20Jahre%20Hetzer%20Patent.pdf , p. 6 (original page 538), accessed on October 17, 2019
- Prof. Hermann Wirth: laudation ( memento from March 13, 2011 in the Internet Archive ) on the occasion of the inauguration of the memorial plaque at the Weimar Hetzerhalle on October 21, 2004;
- http://otto-hetzer.de/files/100%20Jahre%20Hetzer%20Patent.pdf , p. 2 (original page 534), accessed on October 17, 2019
|ALTERNATIVE NAMES||Hetzer, Karl Friedrich Otto (full name)|
|BRIEF DESCRIPTION||German master carpenter, entrepreneur and inventor|
|DATE OF BIRTH||February 11, 1846|
|PLACE OF BIRTH||Kleinobringen near Weimar|
|DATE OF DEATH||January 18, 1911|
|Place of death||Weimar|