File:Kārlis Johansons c1920 "Gleichgewichtkonstruktion" ("Equilibrium-structure"), a Study in Balance.jpg

No higher resolution available.

Kārlis_Johansons_c1920_"Gleichgewichtkonstruktion"_("Equilibrium-structure"),_a_Study_in_Balance.jpg (431 × 472 pixels, file size: 95 KB, MIME type: image/jpeg)

This is a file from the Wikimedia Commons. Information from its description page there is shown below.
Commons is a freely licensed media file repository. You can help.

Summary

Description	English: Kārlis Johansons' c.1920 "Study in Balance" is a proto-tensegrity sculpture. David Georges Emmerich (1988) reported that the first proto-tensegrity system, called "Gleichgewichtkonstruktion" ("Equilibrium-structure"), was created by Kārlis Johansons in 1920. It was a structure of three bars and seven cords with an eighth cable without tension that interactively altered the configuration while maintaining equilibrium. This configuration was very similar to his own proto-system invention, the "Elementary Equilibrium", with three struts and nine cables. Regardless, the absence of pre-stress, a key characteristic of tensegrity systems, does not allow this particular Kārlis Johansons “sculpture-structure” to be considered one of the first tensegrity structures. Kārlis Johansons is also known as: Kārlis Johansons (Latvian), birth Карл Вольдемарович Иогансон or Karl Voldemarovich Ioganson (Russian), partial residence Karlis Johansons or Karl Johannson (English) Karl Ioganson (German) Karel Ioganson (Greek) sometimes translated by hand or bot as Iogansons, Johanson, Johannson, Johanssons, Johannsons, Johanssons, Johnsons, or Carl
Date	circa 1920 date QS:P,+1920-00-00T00:00:00Z/9,P1480,Q5727902
Source	monoskop.org/Karl_Ioganson from another source: www.alyoshin.ru/Files/publika/khan_archi/khan_archi_1_033.html
Author	Unknown authorUnknown author

Licensing

This image (or other media file) is in the public domain because its copyright has expired and its author is anonymous.
This applies to the European Union and those countries with a copyright term of 70 years after the work was made available to the public and the author never disclosed their identity.
Important: Always mention where the image comes from, as far as possible, and make sure the author never claimed authorship.

Note: In Germany and possibly other countries, certain anonymous works published before July 1, 1995 are copyrighted until 70 years after the death of the author. See Übergangsrecht. Please use this template only if the author never claimed authorship or their authorship never became public in any other way. If the work is anonymous or pseudonymous (e.g., published only under a corporate or organization's name), use this template for images published more than 70 years ago. For a work made available to the public in the United Kingdom, please use Template:PD-UK-unknown instead.