LOCK CYLINDER MECHANISM WITH DOUBLE SECRET MECHANISM Russian patent published in 2017 - IPC E05B29/00 

FIELD: construction.

SUBSTANCE: lock cylinder mechanism comprises a sleeve with a latch, and a rotor with a latch, and an embedded secrecy mechanism, arranged in the sleeve. Without a key or with an illegitimate key, the rotor rotates freely inside the sleeve rigidly fixed in the housing. With a legitimate key, both latches are triggered. The rotor is blocked in the sleeve, and the sleeve is unlocked. After this, a single rotation of the key, the rotor, and the sleeve inside the lock housing is possible. The secrecy mechanism is formed by flat pair arresters. The arresters have a projection for reading the key code and a groove cooperating with a latch. The groove position differs at different arresters inside one set. Such arrangement and configuration of the arresters provides a significant increase of secret combinations. The arresters are connected by springs in pairs, which increases the resistance to opening with skeleton keys. The rotating rotor complicates the drilling of the mechanism.

EFFECT: mechanism is suitable for installation in a standard cylinder housing, which extends the scope of the invention.

3 cl, 4 dwg