greyman wrote:Not sure if I agree with the assessment. Most cruciform locks, ie ones with 3 or 4 rows of pins, are quite easy to pick.
I agree, and I have 2 things to add:
1 - in Germany, such locks were used to enhance the security of a certain type of mortise locks that don't even have levers, just depend on the shape of the key. "Buntbartschloesser". Don't know the English name. Rather insecure of course, and an insert like this
http://www.basi.tv/cgi-bin/Anzeige/anze ... itstechnik would convert them into 6 pin pin-tumbler locks, without changing the door hardware.
It meant that you mount such small cruciform lock inside the mortise lock: The key won't go inside anymore, only the new cruciform key will operate the lock.
BUT: Before, you had to keep the key inside the lock while at home, so that no one from the outside could insert a key. Now, if you leave the key in the lock, the 'plug' can be turned from the outside with any screwdriver. Somehow the two manufacturers I had samples from failed to mention that
2 - Also in Germany, high-end alarm systems were for a long time usually armed using a mortise lock ("Blockschloss") that can't be locked while not all windows are closed etc (the blocking function), and also you couldn't enter the premises without unlocking it (false alarm prevention).
And there were mainly three types on the market - one for Euro profile cylinders, one with levers -
and one cruciform style by Zeiss Ikon.
But that one reacts different to picking: Pick it, and turn it, and at a certain angle a pin will enter the lock from the side, releasing a microswitch that triggers the tamper circuit. Or drill out the plug for the same effect. A nice concept
