FIELD: lock production. SUBSTANCE: composed cylinder is placed in the casing, that includes two segments. Flat core with a groove provided for the key is placed between the segments to contact them. Pins spring loaded in pairs are located in one segment. There is a gap between the core and rare plate of the lock. A rod is attached to the core which is screwed in the rare plate. Key groove and the key may be either flat, or U-shaped. EFFECT: high reliability. 3 cl, 11 dwg, 1 tbl
