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David C. Roys Kinetic engine revealed

Posted: Tue Nov 29, 2016 5:27 pm
by Kineticrazy
Hello all,
    I, like many others, have been curious as to the drive mechanism involved in David Roy's sculptures.Particularly the ratchet and pawl design. I happened upon a solution the other day, in the form of an expired patent. I hope others here will enjoy reading it as much as I have.

https://www.google.com/patents/US4637152


Re: David C. Roys Kinetic engine revealed

Posted: Wed Nov 30, 2016 3:19 am
by marklazarz
Kineticrazy:

Thank you for sharing that information!

Mark

Re: David C. Roys Kinetic engine revealed

Posted: Thu Dec 01, 2016 4:15 am
by Kineticrazy
Another interesting thing I found in my research was a post by David's wife. She was answering a question regarding what material is used for the black cables that loop between sections of his sculptures. Turns out they are springs. Extension springs with the little loops snipped from the ends, and several wound together a short distance on the ends to create the length desired. Here's a link to what I believe she was describing.


https://www.amazon.com/dp/B016W7W9KS/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8&colid=13IE62F9MLNI5&coliid=I33J8UUS8A7F7G

I hope to construct something soon, I'll be sure to share.

Eric

Re: David C. Roys Kinetic engine revealed

Posted: Thu Dec 01, 2016 8:49 am
by BillM
Eric

Thanks for sharing the info about David Roy's kinetic sculptures.  His sculptures are certainly mesmerizing.

Bill

Re: David C. Roys Kinetic engine revealed

Posted: Sun Dec 04, 2016 4:13 am
by Kineticrazy
Here is a link to additional drawings of David Roy's sculptures "Aztec" and "Cumulus". If you scroll down the page, you will come to the screen shots of the computer drawings. Of particular interest to me, were the "Aztec" butterfly pawls. If you look closely at the innermost pawl, it has a small green square with an arrow......magnet maybe??

https://priceonomics.com/the-kinetic-wood-sculptor/

Eric

Link to Aztec video.. https://www.youtube.com/watch?v=rY96n-dxrs0&t=44s

Link to Cumulus video.. https://www.youtube.com/watch?v=CAH1o1ruY7Q