[Shop-talk] Making a trap door safe

[nick brearley]

Eric J Russell wrote:
> I'm imagining something like the mechanisms at Thomas Jefferson's 
> Monticello. When the doors are opened a hidden pulley system could 
> move bars - like the trafficators on an olde English car - into the 
> hallways around the opening.
>

For starters, how about this?

http://www.cellaraccess.co.uk/Grille%20Door.html

https://www.youtube.com/watch?v=nCQLGCmhllo

Would keep children entertained for hours. Won't be cheap, but still 
cheaper than lawyer's bills...

Nick Brearley