On Fri, 16 Sep 2005 03:54:33 +0100, John wrote:

Leafing through some old turning magazines, I came across a novel
vacuum chuck in the September 1997 issue of "Woodturning" (UK).

I've posted a scan of the original article on
alt.binaries.pictures.woodworking.

Looks a simple device (though the insides may be more complex than
they look.

The maker seems to have vanished or moved. But the chuck looks
shop-made, so has anyone ever seen one, and/or know how it's made?

John