Forced closing
Forced locking on a door means that the key can only be removed from the lock after unlocking if the door has been properly locked. The inventor of this compulsory locking with the Berlin socket key was the master locksmith Johann Schweiger around 1912. Today there are still compulsory locking locks from Berlin .
A typical application of these locks were front doors in Berlin apartment buildings.
Compulsory closure is (among other things) a term that is widespread in Berlin. There is the so-called push - through key and recently also mandatory locking without a push-through key, namely with a normal profile cylinder key, but only for doors that can be accessed from one side (garbage boxes, parking lot barriers, etc.), since the cylinder key cannot be inserted.
The technology is also common in public lockers, where the key can only be removed when the door is closed.
The compulsory locking is also used for security-relevant locks in the railway sector, sometimes in such a way that only one key can be removed from two mechanically connected locks.
However, the last-mentioned cases do not represent an “absolute” compulsory closing, since these actions can also be carried out with the door open, which was not possible with the “real” compulsory closing.
proof
- ↑ Patent WO2005017293 : Arrangement as part of a locking mechanism. Published on February 24, 2005 , inventor: Peter Bock.
- ↑ Almost 90 years ago a craftsman from Weddingen invented the push-through key . tagesspiegel.de, March 8, 2000, accessed March 8, 2009