thang010146 | Spherical scissor mechanism 2 @thang010146 | Uploaded 1 year ago | Updated 1 day ago
Input: red triple arm.
See a real mechanism
en.wikipedia.org/wiki/Mechanism_%28engineering%29
(Section: Spherical mechanisms)

Inventor files of this video:
mediafire.com/file/zby1ri2u4k4z81q/SphericalScissor2Inv.zip/file