workstation wrote:Three separate latches is a good idea, but I wonder how much of an effort it is to withdraw them from outside with the key. I would like a lock whereby on insertion (and obviously slight turning) of the key, the outer handle becomes usable. This would allow each of the hookbolts and deadbolts to be sprung, as there would be enough leverage to push them down.
That would be a good concept, too.
But I still would like to mention that many (I guess 90%) of new domestic doors installed in Germany have a system where the key operates all the locking points (not the handle). So no problem should be expected from that.
Larger key heads are preferred for such doors, of course - e.g. KESO makes that distinction (small round key head vs. large triangular).
mh
