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Portable Step and Bridge Ladder, System Porta (1874)
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The interactive animation shows a WebGL model of a mobile ladder, which consists of intermateable separate ladder segments. The interactive animation shows the ladder in the upright, put together state. The mechanic Paul Porta, who lived in Milan, applied this ladder for a patent in 1874.


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Click here to view the WebGL-animation.

Linked items
Images: Portable Step and Bridge Ladder patent (1874), symbolic image
Mechanisms: Portable Step and Bridge Ladder, System Porta (1874)
Interactive animations: Selection of 15 interactive Animations showing historical patents
Permanent links
DMG-Lib FaviconDMG-Lib https://www.dmg-lib.org/dmglib/handler?manim=7001053
Data provider
ITUIlmenau TU  http://www.tu-ilmenau.de
Administrative information
Persons producteur: Heinz, Felix
producteur: Döring, Ulf
Editeur: Henkel, Veit (Ed.)
inventor: Porta, Paul
Time of creation 2014
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