LEVER TUMBLER LOCK Russian patent published in 2020 - IPC E05B25/00 

FIELD: locks.

SUBSTANCE: invention relates to ironmongery and can be used in safes, in overhead, mortise locks for inner doors of residential and public buildings. Lever tumbler lock comprises deadbolt installed in housing with guide for key, installed with possibility of reciprocal movement, double set of spring-loaded lever tumblers, which are arranged on both sides of the guide for the key with the possibility of differently directed reciprocal movement in the direction perpendicular to the crossbar movement, and a two-beard key. In the lock there introduced is an electromagnet interacting with the crossbar, which is controlled by a double-channel photorelay, which optical axes are located perpendicular to the surface of the lever tumblers provided with holes, each of which is made coinciding with its optical axis during rotation of a double-beard key, wherein each channel of the photorelay is formed of series-connected two photodetectors, installed on different sets of lever tumblers.

EFFECT: advantage of the invention consists in the fact that the lock becomes more reliable against unauthorized opening; it does not open with jammers, impression, self-impression and devices according to patents of RF 2361050 and RF 2489560.

8 cl, 5 dwg