Making a “rule joint” on a Seventeenth-century Butterfly Desk


Right here is my SketchUp design with the unique butt joints within the prime items.

Lately I started the copy of a Seventeenth-century Butterfly Desk. The unique piece, within the Berkshire Museum in Massachusetts, was constructed with plain, sq., flat joints within the prime between the middle mounted leaf and the outer hinged leaves. Whereas this works properly, I need to substitute it with a stronger and extra stunning rule joint.

Right here is the SketchUp design exhibiting rule joints.


Whereas the rule joint appears to be fairly easy, the small print are complicated, together with the positioning of the particular hinges. Here’s a dimensioned drawing exhibiting these particulars. Discover, specifically, that the middle of rotation is raised barely from a place you’ll anticipate. This offset is necessary for a clean rotation with out gaps.

I’ve ready a set of 4 brief movies (in a Playlist) capturing my SketchUp means of changing the unique joints to rule joints.



Extra from Tim Killen

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