BIT-KEY LOCK Russian patent published in 2009 - IPC E05B17/14 

FIELD: construction.

SUBSTANCE: lock contains a lid and a case with guiding slots for the key. The case is equipped with the stands, intended for directing movement of mobile elements of the lock. A plate with girth rails and, at least, one perpendicular rod is installed in the case. There is also a set of spring-driven against the case plates, with stands securing plane-parallel movement of the plates arranged in the slots therein. In each of the plates there is a graded slot with coded ledges and grooves. The lock is also equipped with a device interfering with unauthorised opening of the lock, made as a grooved protective plate, arranged parallel to the plates and spring-driven against the case; in the grooves of the plate there are stands securing its plane-parallel movement. Protective plate is equipped with a device interacting with, at least, one of the plates for mutual movement, and has a shaped form. It is usually T-shaped with a slot for the key.

EFFECT: locking of the slot, preventing its unauthorised opening with false keys.

4 cl, 3 dwg