On Mon, 19 Jun 2006 20:51:46 +0100, Owain
wrote:

They're used at the base of angle-poise type lamps for mounting on
drawing boards. You might be able to find somewhere chucking out drawing
boards as they move to CAD.


Also used on some boom arms for microphone stands. Drum kits might also
be a possible source of supply -

Thanks for the good suggestions. I now seem to remember seeing some
kind of joint on a drum kit that would have been ideal.

Al D