I have never heard of a clockwork governor much less seen one. But
from the description it sounds as if it has small wheels which are
geared to an escapment and balance wheel similar to a watch or
non-penduleum clock.

The closest thing I can think of that might be adapted would be a
childs toy car with a flywheel for power. A flywheel would smooth out
my erratic movements when using a cutting torch.

Dan