Lets play identify this tool. (please help me identify this tool)

[Playingwithmetal]

I have a friend that is moving shops and I was given a couple oddball items which I do not know what they do. it appears that one of them appears to be part of another machine or tooling and the others are things I have never seen.
Thanks in advance.

 

[whitmore]

To start with, the geared tooling is intended to move an item clamped on the
dovetailed (left side) block in the pattern set by the reference (block on the right,
apparently machined cylindrical) as the assemblage is rotated (belt drive). If
your workpiece is fixed to the driven block, and a grinding wheel is applied
to it, it will grind the workpiece face to a cylinder.
I suggest a grinder, because the spring isn't terribly strong, metal-cutting
forces would cause chatter if single-point cutters were used.

The reference block is probed with a tracer that can be adjusted toward
or away from the axis, to change the cylinder-on-workpiece radius.