Jinx,

On Tue, 26 Sep 2006 12:33:44 +1200, Jinx wrote:

> I recall a post from a looong time ago from someone who wanted
> (I think) to make a monitor appear from out of a false ceiling. The
> query ISTR was more about the s/w (end-stops etc) rather than
> the mechanics. I believe he was using Archimedes screws (ie like
> the square-cut drive screws on a lathe bed)

Ah, that would be Acme threads (cue the Roadrunner! :-)  The only trouble with them in a domestic environment is that they're pretty noisy.  
Presumably he didn't have the rods poking down from the ceiling all the time, which would mean he'd need their height above the ceiling for when 
they were retracted - fine if there isn't a room above!

Cheers,



Howard Winter
St.Albans, England


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