Ertel & Sohn (fl. 1821- 1984), München.

Traugott Leberecht von Ertel (*1778-†1858) [5]
Traugott Leberecht von Ertel (*1778-†1858) [5]

ERTEL

Traugott Leberecht von Ertel (1778-1858). 1806, worked for Reichenbach, Utzschneider, und Liebherr (est. 1804, geodetic instruments). 1814, left that business with Reichenbach. 1821, became owner of 'T. Ertel & Sohn, Reichenbach'sches Mathematisch Mechanisches Institut' (name in 1834, when catalog listed 69 items). 1858, 100 employees. 1850 address, Karls Strasse, Munich; near to G & S Merz, also established by Reichenbach. Sons: Georg Ertel (1813-1863); Gustav Ertel (1829-1875), joined business. Gustav later owner, his son Georg an employee but left in 1876. Moritz Roehrer technical director, 1876 resigned & replaced by August Dietz (1848-1920), employee since 1866. Meridian circle for Vanderbildt Univ., Tennessee, 1878. Transit instrument at Bucknell University, Pennsylvania. 1890, Diez purchased Ertel, used name T. Ertel & Sohn. 1911, Julius Rinnebach joined firm, incorporated as 'T. Ertel & Sohn G.m.b.H., mathematisch-mechanisches Institut fuer geodaetische und militaerwissenschaftliche Instruments'. Technical director Adolf Hahn. Other managers, Walter Preyss (1879-1942), son Carl Preyss (director in 1945, 1981 still owner & manager). 1983, Ertel operating in Puchheim, suburb of Munich, 150 employees, specializing in theodolites, no astronomical instruments, 'Ertel-Werk fuer Feinmechanik'. Ertel goes bankrupt in 1984.

 

Sources:

 

1) Lagemann, Robert. The Garland Collection of Classical Physics Apparatus at Vanderbilt University. Nashville: Folio, 1983. 317pp.

2) Preyss, C.R. Von Reichenbachs Werkstatt zum Ertel-Werk fuer Feinmechanik, 1802-1962. Munich, 1962.
3) Ertel-Werk Wikipedia


Ertel is listed under mechanical instrument makers in the Munich Adressbuch of 1835. Google Books.

At this time his factory employed 40 workers.[9] 

 

  

   

 

The T. Ertel & Sohn Reichenbach'sche Mathematisch-mechanisches Institut (pictured above) [5] addressed at Louisenstraße 5, located on the corner with Karlstraße, is indicated in red on this map of 1830. The factory was renamed Ertel-Werke in 1921. The map shows the house numbers before the renumbering in 1833 [11]. The building was destroyed during the war in 1944. [5]

Map extract courtesy of Bayerische Landesbibliothek Online (BLO). [7] 


 

Ertels catalogue and price-list in 1831. Astronomische Nachrichten Vol. 10, 1833. Google Books.


Ertel & Sohn Kilometerzirkel

Kilometer compass invented by Ludwig Sailer, and made by Ertel & Sohn. The signature is Sailer Prlt; a Google search reveals that Prlt stands for Premier Lieutenant, first lieutenant in English. The compass comes in a leather sheath and measures 130mm in length. An exact date is difficult to determine, but probably 1870-1890.

 

 

 


Ertel & Sohn double optical square ca. 1875.

 

 

Baur, Franz; Lehrbuch der niederen Geodäsie, Wilhelm Braumüller, Wien 1871. page 79. Google Books.


NOTES / REFERENCES

 

1. Ertel Biography https://de.wikisource.org/wiki/ADB:Ertel,_Traugott_Leberecht_von

 

2. Baur, Franz; Lehrbuch der niederen Geodäsie, Wilhelm Braumüller, Wien 1871. page 79.

 

3. Heer, Rainer; Biographien von Herstellern zur geodätischen Messtechnik in der geodätischen Sammlung des Geodätischen Instituts der Leibniz Universität Hannover

 

4. Ertel catalogue http://www.astropa.unipa.it/biblioteca/Strumenti/e-catalogues/Ertel-Werke/Catalogo.html 

 

5. Preyss, C.R.;  Von Reichenbachs Werkstatt zum Ertel-Werk für Feinmechanik 1802-1962, München 1962.

 

6. Plan of Munich 1806 (centre only) with house numbers: http://www.deutschefotothek.de/documents/obj/70305321/df_dk_0010696

 

7. Plan of Munich with Ertels location in 1830, before the house renumbering: https://www.bayerische-landesbibliothek-online.de/images/blo/ortsblaetter/karten/karten/St_Muen_1830_01-3.jpg

 

8. Plan of Munich with Ertel's location in 1833 after the house renumbering: https://www.bayerische-landesbibliothek-online.de/images/blo/ortsblaetter/karten/karten/St_Muen_1833_01-5.jpg

 

8. Plan of Munich 1910 with house numbers (at the street corners): http://www.deutschefotothek.de/documents/obj/90009417/df_dk_0010162

 

9. Artistisches München im Jahre 1835, oder Verzeichniss gegenwärtig in Bayerns Hauptstadt...1835 p. 27 Google Books.

 

10. LUDWIG SAILER: http://www.kriegstote.org/cgi-bin/baseportal.pl?htx=/Kriegsopfer/details_kriegstote_aktuell&Id=50636

 

11. Königlich bayerische Haupt und Residenzstadt München nach der neuen Hausnummerirung 1833. p.158. Google Books

 

12. Dyck, Walther von; Georg von Reichenbach, Selbstverlag des Deutschen Museums, München 1912.  https://archive.org/stream/georgvonreichenb00dyckuoft#page/10/mode/thumb Internet Archive 

 

 

 

Allgemeine Zeitung München 27.07.1826 Google Books
Allgemeine Zeitung München 27.07.1826 Google Books
München Adressbuch 1910
München Adressbuch 1910