This Old House toured a factory which included an oval picture frame lathe
machine. A 2 or 3' frame was mounted and spinning. It was dizzying to
watch, going roundNround, upNdown and even sideways. But when you focused
on the toolrest, it was clear the work was all passing the same point in the
same direction. From a distance there was "no WAY" that thing was going to
I built an adjustable oval turning fixture from a sheet & a half of plywood
for making a dining table top. It would make any size oval from about 8"X6"
The woodworking magazine where I saw the plans showed an overhanging router
mounted to make the cut as the top section of the fixture was turned but I
didn't trust my setup there so just mounted a pencil to the overhead arm and
drew the ellipse on the wood & then sawed to the line. (another one of my
one use projects that's still taking up space in the shop somewhere.)
Also, at one time one of the novelty catalogs was selling an "executive toy"
thing that had two intersecting slots w/a handle coming off a sliding piece
so that you could basically move the handle in a circular pattern which the
two slots would allow though they were inlet in the small board at right
angles. Kind of hard to describe..
When we were making them in the sixties, we called them bullsh*t
grinders. The instructions said to put what needed to be disposed of
in the middle and turn the handle.
Thanks guys, I haven't seen one of those in years.