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Copy of the article: http://archive.is/gj3sf
That last image with the spheres seems like one of the most straightforward... The sphere is in 2 halves, the long U shaped piece with the barbs ties them together. The clasp at the top can enter the U shaped piece before it is inserted into the sphere. The tuning fork thing is the key. insert it through the 2 holes in the bottom and the barbs on the U shaped piece are bent back so the U can be removed.
It seems the correct URL is http://publicdomainreview.org/2018/01/24/the-dreams-of-an-in... with the final slash.