Otto Mackensen
Otto Mackensen (born May 14, 1879 in Holzminden ; † February 10, 1940 in Jena ) was a German mechanical engineer , optician and inventor.
Life
Otto Mackensen was born in Holzminden in 1879 as the son of the baker's widow Luise Mackensen, b. Meier, born out of an illegitimate relationship. His older half-brothers were the painter Fritz Mackensen and the architect Wilhelm Mackensen . Otto attended high school in Holzminden and in Hanover . He received his Abitur at the Oberrealschule in Elberfeld and then studied mechanical engineering at the Technical University of Hanover from 1899 and at the Technical University of Braunschweig from 1902 . There he passed the examination as a qualified engineer specializing in mechanical engineering in 1904 and remained Hermann Franke's assistant until 1907 , before moving to Jena to Carl Zeiss . In the optical workshops, he took over the management of the engineering design office, which he held until 1940. In addition, he was entrusted with numerous special tasks in the company. During the First World War , he did brief military service as a technical advisor to the Artillery Examination Commission.
Mackensen was awarded the title of professor by the state of Braunschweig in 1917 , even before his doctorate. In 1926 he was awarded a Dr.-Ing. PhD. He was a member of the German Society for Mechanics and Optics . Mackensen was married to the foreman daughter Hedwig, b. Leap. The couple had a son and a daughter. Otto Mackensen died in Jena in February 1940 at the age of 60.
Mackensen's inventions, mainly relating to telescopes, aiming devices and special grinding processes, are documented in 44 patents. He manufactured headlight mirrors up to 2 m in diameter, for the processing of which he developed the meridian grinding process. He also invented an emery sorting system. In 1933 he led the development of the machine production of aspherical , ie non-spherical, surfaces for optics to success. A radial insert ball bearing that was used for this, and also used elsewhere, was named after him.
Fonts (selection)
- Contribution to grinding glass for purposes of optics , dissertation, Braunschweig 1926.
literature
- Horst-Rüdiger Jarck: Mackensen, Otto, Prof. Dr. In: Horst-Rüdiger Jarck , Günter Scheel (ed.): Braunschweigisches Biographisches Lexikon - 19th and 20th centuries . Hahnsche Buchhandlung, Hannover 1996, ISBN 3-7752-5838-8 , p. 398-399 .
- Friedrich Stier: Mackensen, Otto. In: New German Biography (NDB). Volume 15, Duncker & Humblot, Berlin 1987, ISBN 3-428-00196-6 , p. 622 ( digitized version ).
Individual evidence
- ↑ Short biography on the website of the Greene Heimatverein , based on: Jürgen Teumer: Familienchronik Fritz Mackensen . In: Heimat-Rundblick , Nos. 118 and 119, 2016.
- ^ Deutsche Mechaniker-Zeitung , J. Springer, 1907, p. 202, Textarchiv - Internet Archive .
| personal data | |
|---|---|
| SURNAME | Mackensen, Otto |
| BRIEF DESCRIPTION | German mechanical engineer, optician and inventor |
| DATE OF BIRTH | May 14, 1879 |
| PLACE OF BIRTH | Holzminden |
| DATE OF DEATH | February 10, 1940 |
| Place of death | Jena |