I'm not sure whether i'm posting this in the right area or whether it should be in the home made tools and jigs area, but either way i thought it was interesting and should be shared around.
I've been doing some research as of late on recreating the types of 'ripple mouldings' seen on European 17th to 19th century ebony and ebonised picture frames and cabinets such as these.

Ripple-ref.-0750.jpgFrameMyTV1026-1.jpg0021.jpg

I've found a few articles dealing with specific details on the construction of the machine for producing them, as well as several drawings and diagrams that fairly clearly show the workings of them. Hopefully they might be of use to others on here.

This one's in Swedish, but nonetheless has an awful lot of very useful visual information on it, and of course a huge amount of useful written stuff too if you can read it or wish to take your chances with google translate.
https://www.iei.liu.se/malmstens/mob...0/09.ex.JE.pdf

This one's in english and deals with a similar machine, albeit a less complex version for doing the same thing.
http://cool.conservation-us.org/cool...2_thornton.pdf

And pages 62 to 64 of this one deal with the same type of machine that has been fitted with a motor to make life easier. Its an interesting read and as an added bonus is in English!
http://www.dominikmatus.cz/files/D%C...working058.pdf

Here's a good video of one in use too:
https://www.youtube.com/watch?v=2E_FghU_ew8

And finally, here are some good diagrams from another article about waving engines that might also be of interest and use to some on here.


DRAWING-3.jpgDRAWING-2.jpgDRAWING-1.jpg

The source for those pictures is this article: http://www.woodworkersinstitute.com/page.asp?p=5127