"Bob Eager" wrote in message
...
On Wed, 19 Jul 2006 22:20:23 UTC, Steve Firth
wrote:

Only, IIRC if the user "double locks" the door. If they simply let it
slam
to as 99.9999% of users do then the punger can be "walked" out of the way
by using a pair of picks (think sharp pointed blades as previously
described). As the punger is moved the tongue of hte lock will move with
it.

Not on my lock. The plunger is pressed *in* when the door is closed. It
cannot move any further in than it is already. It cannot come out
because the striker plate is in the way. IOW, there is no way it can
move (or be moved) with the door closed. The tip of the plunger is flush
with the 'edge' face of the lock.

Or am I misunderstanding something?

(thinks)

I've seen yale type locks with a secondary moving bolt within the main bolt.
Are these the less secure ones?

The ones you're talking about (bob) are the ones I've seen - the plunger
looks like a thinner version of the main bolt, just above it, and when the
door is shut it rests on the striker plate, ie can't move.

http://www.screwfix.com/app/sfd/cat/...2569&id=54648#

shows a similar one. In the enlarged photo, you can see a little bolt above
the main one - this is the one which rests on the striker plate, rather than
within the recess.

(this isn't the same as the ones I've seen - the little bolt is of the same
profile as the main bolt on those)

cheers,
clive