Friedrich Rosengarth

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Friedrich Rosengarth (* 1885 ; † August 9, 1977 in Bergisch Gladbach ) was a German inventor and technician ; he is also known as the “ glass wool pioneer”.

Life

Rosengarth made inventions at a young age. For example, he developed a dog brushing machine for his small dog, a fox terrier , with which he regularly went for walks. To do this, he had built a low tunnel of wire mesh with brushes hanging from above, below and on the sides. This tunnel led into a kennel in which a piece of sausage was hanging, which caused the dog to run through the tunnel into the kennel.

Around 1926 Rosengarth was employed as a technical employee at Glas- und Spiegel-Manufactur AG Gelsenkirchen Schalke . During this time he also completed a technician's training at an evening technical school. In 1928/29 he happened to observe the production of cotton candy from Turkish honey on a rotating plate using the centrifugal method at the Bergisch Gladbacher fair . This gave him the idea of ​​using glass as the starting material and a similar centrifugal process to produce glass floss for insulation purposes. He made the first primitive attempts together with his brother in the basement of his house by melting rosin and flinging it into threads using a disc driven by a vacuum cleaner motor. The result was so satisfactory that he continued to experiment.

Together with the owners of the Bergisch Gladbacher Maschinenfabrik Hager & Weidmann AG Fritz and Julius Hager, he built the first small furnace in which he melted broken bottles and let them fall through a funnel onto a rotating disk. That was the hour of birth of glass floss using the centrifugal method. After a while, the process was so mature that he and the Hager brothers wanted to apply for a patent on it. But they lacked the capital to apply for a patent. So it came about that on October 15, 1931, the rights for a process for the production of fibers or webs from glass, slag and similar materials that were plastic at high temperatures (then called glass silk for short ) were given to the Dutch company Maatschappij tot Beheer en Exploitatie van Octoien NV resigned to The Hague . Saint Gobain was involved in this patent exploitation company. The invention was patented in Germany in 1930 under number 539738. The date of the announcement of the grant of the patent for tot Beheer was November 26, 1931. The inventor was not mentioned, however.

As a glass technician, Rosengarth then founded the company Glas-Silk-Industrie-GmbH in Bergisch Gladbach together with the Hager brothers , which produced glass fibers using the centrifugal method under the name of glass wadding . In this company he worked as a co-founder and technical director until 1955. The process was named the Hager process after the company in which Rosengarth was first employed . The originally relatively small company Glasseide-Industrie-GmbH developed into a company whose parent company Saint-Gobain became the world market leader. In 1972 , the company merged with Glaswatte GmbH and Glasfaser GmbH, Bergisch Gladbach and Aachen in 1972 to form Grünzweig + Hartmann and Glasfaser AG . In 2000 the company was renamed Saint-Gobain ISOVER G + H AG , based in Ludwigshafen am Rhein . At the same time, ISOVER was defined as the new product logo .

In memory of Rose Garth he was from the town of Bergisch Gladbach in the district Moitzfeld the Friedrich-Rose Garth Road dedicated.

literature

Web links

Individual evidence

  1. ↑ a b c d e f g h Karl-Hans Garke, Leopold Schneiders: History of the glass-silk industry GmbH, later Glaswatte GmbH, Bergisch Gladbach, later glass fiber GmbH, Bergisch Gladbach or Aachen, today Grümzweig + Hartmann and Glasfaser AG , Bergisch Gladbach plant. Saint-Gobain Isover G + H AG, Aachen 1978, OCLC 907736768 .
  2. ^ A b c Andree Schulte: Bergisch Gladbach, city history in street names (= contributions to the history of the city of Bergisch Gladbach. Volume 3; series of publications by the Bergisches Geschichtsverein Rhein-Berg eV Volume 11). Edited by the Bergisch Gladbach City Archives and the Bergisches Geschichtsverein, Abt. Rhein-Berg e. V., Bergisch Gladbach 1995, ISBN 3-9804448-0-5 , p. 353 f.
  3. ↑ a b Malte Ewert: G + H. Where waste glass makes a career. In: Kölner Stadtanzeiger . December 20, 2011, accessed October 3, 2014 .
  4. ↑ Claus Asam: Artificial mineral fiber insulating materials. (PDF; 912 kB) BBSR reports COMPACT. In: bbsr.bund.de. Federal Institute for Building, Urban and Spatial Research (BBSR) at the Federal Office for Building and Regional Planning (BBR), January 2011, p. 2 , accessed on December 29, 2018 .
  5. ↑ Guido Wagner: Invention. From glass floss to a landmark. In: Bergische Landeszeitung . December 31, 2011, accessed October 3, 2014 .
  6. ↑ Edmund Ruppert : The insulation material frontrunner ISOVER. In: Rheinisch-Bergischer Calendar . 2010, ISSN  0722-7671 , p. 239 ff.
personal data
SURNAME Rosengarth, Friedrich
BRIEF DESCRIPTION German inventor and glass blower
DATE OF BIRTH 1885
PLACE OF BIRTH Germany
DATE OF DEATH August 9, 1977
Place of death Bergisch Gladbach