Your answer may be in the attached document.Congrats! How did you get past the "non-obvious" and public domain issues? It seems I've seen something like that somewhere in a novelty shop or old-time cartoon. (says he with only one patent) : )
You can see a few of them at www.jncarr.com/clocks. To see a video of one, go to the "about" page: www.jncarr.com/about.Congratulations Joe! Where can I see the finished clocks? Sorry if already been asked and answered.....
Coleman