"Grimly Curmudgeon" wrote in message
...
On Wed, 21 Sep 2011 11:50:48 -0700 (PDT), Owain
wrote:

What would be most useful is an electromagnet which drops a weight
which pulls the door shut.

Or, just a weight on a pulley. No electrics at all.

Just tilt the thing back with a couple of wedges under the front feet and
have self closing doors.