Richard Ulbricht (engineer)
Friedrich Richard Ulbricht (born August 6, 1849 in Dresden ; † January 13, 1923 there ) was a German engineer , professor at the Royal Saxon Technical University in Dresden and President of the General Management of the Royal Saxon State Railways .
Life
Richard was the son of the sculptor and royal coin engraver Karl Friedrich Christian Ulbricht (* March 20, 1813 on his father's estate in Dittersdorf; † August 19, 1861 in Dresden) and his wife Rosalie Emma Bosse (* May 30, 1825 in Dresden; † February 17, 1906 ibid). He graduated from the Royal Technical College of Saxony (forerunner of the Technical University of Dresden ) in Dresden and obtained his doctorate from the University of Jena in 1870 . After a brief activity in the Saxon road construction administration, he switched to the railway service in the telegraph and security field.
From 1883 to 1910 he lectured on this subject at the Royal Saxon Technical University in Dresden in the engineering department, initially as an honorary professor for telegraphy, telephone and signaling. In 1890 he was appointed professor and successor to Karl Eduard Zetzsche and later founded the institute for low-voltage technology together with the physicist Wilhelm Hallwachs .
When the Royal Saxon State Railways decided after the Frankfurt Electricity Exhibition of 1891 to build a three-phase power plant for Dresden's train stations in the so-called Chemnitz Cave, he was entrusted with this. The plant went into operation in 1897.
He also dealt with photometric investigations for the best possible lighting of the train stations and found that in a hollow sphere the wall lighting is proportional to the total luminous flux of the light source. He developed a measuring device consisting of two hollow hemispheres, the spherical photometer, commonly known as the “ Ulbricht sphere ”. It was also used to test filaments.
Ulbricht was also a member of the supervisory commission for electric trams , introduced the hoop pantograph and carried out investigations into earth currents in electric trains. With effect from October 1, 1910, he became President of the General Management of the Royal Saxon State Railways and thus successor to his predecessor, Karl von Kirchbach, who had left office . He had the Moede - Piorkowskische method modified for a psychotechnical aptitude test for locomotive drivers and introduced in Dresden. He left the publication on this to the engineers Albert Schreiber and Friedrich Gläsel. The test procedure was initially used to select the locomotive driver , later also the train dispatcher, and was discussed in many other German railway companies after the First World War . During his term of office as President of the General Management, the redesign of the Leipzig train station facilities and the construction of the new Leipzig Central Station also fell from 1913 to 1915.
When in 1918 the Saxon King Friedrich August III. abdicated and a free state was proclaimed in Saxony , the word "royal" was omitted from all designations for offices. Richard Ulbricht's official title was then changed to President of the General Management of the Saxon State Railways. On March 31, 1919, he resigned from the railroad service and retired, but in the following years he wrote important books about the spherical photometer and the influence of high-voltage lines when railways cross.
In 1910 he was awarded an honorary doctorate from the Technical University of Dresden.
family
Richard Ulbricht married Johanna Helene Canzler (born December 15, 1857 in Dresden) on August 5, 1877 , a daughter of the secret senior building officer and royal Saxon master builder Traugott Karl Adolf Canzler . Her daughter, Helene Gertrud Ulbricht (* July 6, 1880 in Dresden - † March 7, 1971 in Düsseldorf ) married Paul Johannes Ritterstaedt (* November 20, 1869 ) on July 6, 1902 in Dresden, the Finance Council of the Royal General Directorate of the Saxon State Railways in Dresden; † November 29, 1914 ibid).
Publications
- 1870: The Dubois follow-up curve as a chain bridge line (diss.)
- 1889: History of the bourgeois Saxon state railway
- 1910: Point and signal setting
- 1920: The spherical photometer (integrating sphere). Presentation of his theory, training and application, with special consideration of the sources of error
- 1921: Railroad crossing by high voltage line
literature
- Ludwig Binder : Go. Building Councilor Prof. Dr. Dr.-Ing. eh Ulbricht, President a. D. †. In: The electrical company , Volume 21, Issue 4 (February 24, 1923), p. 48.
- Dorit Petschel : 175 years of TU Dresden. Volume 3: The professors of the TU Dresden 1828–2003. Edited on behalf of the Society of Friends and Supporters of the TU Dresden e. V. von Reiner Pommerin , Böhlau, Cologne a. a. 2003, ISBN 3-412-02503-8 , pp. 984-985.
- Kurt Jäger, Friedrich Heilbronner: Lexicon of electrical engineers . 2nd Edition. VDE-Verlag, 2010, ISBN 978-3-8007-2903-6 ( table of contents, 125 kB [PDF]).
- German Railway Directorate, Railway Directorate Dresden 1869-1993, Helga Kuhne, VBN Verlag B. Neddermeyer, 2010, ISBN 978-3-941712-05-8 .
Individual evidence
- ↑ Honorary doctoral students of the TH / TU Dresden. Technical University of Dresden, accessed on January 29, 2015 .
Web links
- Horst Gundlach, Saarland University: Psychology and psychotechnology in railways , pp. 2–3 (PDF, 53 kB)
- Pedigree of the Ritterstaedt and Ulbricht families
- Photo by Richard Ulbricht
- CV of Friedrich Richard Ulbricht on electrosuisse (PDF; 30 kB)
| predecessor | Office | successor |
|---|---|---|
| Karl von Kirchbach |
General director of the Royal Saxon State Railways 1910–1919 |
Kurt Richard Mettig |
| personal data | |
|---|---|
| SURNAME | Ulbricht, Richard |
| ALTERNATIVE NAMES | Ulbricht, Friedrich Richard (full name) |
| BRIEF DESCRIPTION | German inventor and university professor |
| DATE OF BIRTH | August 6, 1849 |
| PLACE OF BIRTH | Dresden |
| DATE OF DEATH | January 13, 1923 |
| Place of death | Dresden |