Jonas Patrik Ljungström

Jonas Patrik Ljungström (12 March 1827 - 22 October 1898) was a Swedish cartographer, geodesist, and teacher at the Royal Institute of Technology.[1]

Jonas Patrik Ljungström (ca. 1870s).

Biography

Jonas Patrik Ljungström was born 12 March 1827 in Uddevalla as the son of jeweler Johan Patrik Ljungström, and Maria Christina (née Spaak). His great grandfather was the Protestant reformer Peter Spaak, and his 3rd great grandfather early industrialist Abraham Hülphers the Older. He married Amalia (née Falck), and their issue included Georg Ljungström, Oscar Ljungström, Birger Ljungström, and Fredrik Ljungström.

After examination in Stockholm in 1849, Jonas Patrik Ljungström served as land surveyor for the Gothenburg and Bohus County from 1864, and as cartographer at the governmental agency for cartography in Stockholm 1873-1888. Parallel to this, he developed land survey and precision instruments in own manufactory that cooperated among others with the early manufactory of L. M. Ericsson. Furthermore, he taught at the Royal Institute of Technology in Stockholm.

Technical design of the distance tube for land surveying.
Jonas Patrik Ljungström with a unit of the distance tube land surveying precision instrument (1877).

Jonas Patrik Ljungström's multiple technical innovations contributed and earned rewards among others at the General Industrial Exposition of Stockholm (1866), the General Art and Industrial Exposition of Stockholm (1897), Exposition Universelle (1878), Exposition Universelle (1900), the Brussels Geographic Conference (1876), the Centennial Exposition in Philadelphia (1876), and the World's Columbian Exposition in Chicago (1893). While in Philadelphia 1876 he met the Swedish physicist Salomon August Andrée who remained a friend of the family until his death, teaching Ljungström's sons Birger and Fredrik in physics.

The most successful of his inventions, the distance tube land surveying precision instrument, endured in professional use until the 1950s. Noted by John Ericsson (1803-1889) as "an innovative mind of extraordinary capability and extensive mechanical wit", Jonas Patrik Ljungström's works are represented by the Swedish National Museum of Science and Technology,[2] as well as by regional cultural heritage museums.[3][4]

Works
  • Beskrifning öfver distanstub med sjelfreglerande skala jemte sättet för instrumentets justering och användande (1877)[5]

Distinctions

Further reading
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References
  1. "226 (Sveriges statskalender / 1881)". runeberg.org.
  2. "Distanstub, i låda". digitaltmuseum.se.
  3. "foremalspost". Archived from the original on 2009-02-21. Retrieved 2018-02-21.
  4. "New Page 1". web.telia.com.
  5. "LIBRIS - Beskrifning öfver distanstub ..." libris.kb.se.
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