Gymnast2

I got this Köhler vibrating shuttle sewing machine with this wobbling disk mechanism. You can see it in this video:

https://youtu.be/LwebFUPI1Xo

I guess that this mechanism got a better name. Do you know the name?

Have you seen this kind of mechanism in other sewing machines?

Gymnast2

I just like to add, that the normal mechanism I have seen to make the same kind of movement are made with the Arm Shaft and Arm Rock Shaft like you see on a Singer 66 and a lot of other sewing machines. This is from the parts list of a Singer 66:

Gymnast2

I found a bit more now. This is a video showing the mechanics of a Free Sewing Machine Company sewing machine no. 255C. It is from Rockford, Illinois. I am not sure when the machine was produced.
The mechanism seems to be named "Rotoscillo". This is youtube video showing the mechanics of this machine:

https://youtu.be/gHdjd3ejKgs

This is a link to a manual:
http://ismacs.net/free/manuals/freevs-c-e-ce-manual.pdf

It have got the same kind of wobbling mechanism, but placed in another position. Furthermore it got a bearing link system for the needle bar and take-up lever as this Köhler machine got.

The machine from Free Sewing Machine Company has been presented before in this forum:
Questions about The Free Sewing machine