Knowing that the grandkids were coming for Thanksgiving and that we were likely going to be inside due to the weather, I picked up a piece of walnut from the drying stack and whipped out this little mechanism to maybe occupy a bit of their time, and just maybe make them think about what was involved - relative motion, path defined by the handle, etc, etc. Seems to me that I've seen this diagram before with a name associated, but I can't seem to find it. Thought of a modified Scotch Yoke, but that doesn't seem to be real. Anyway, they thought it was cool for about two minutes, then the electronic games called to them

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