MULTIFUNCTIONAL LOCK OF HIGHER RELIABILITY Russian patent published in 1998 - IPC

FIELD: locking devices. SUBSTANCE: lock has cylindrical hollow body 1 with fixing longitudinal slots 9 made in its internal surface. Installed in body is rotatable core 2 with operating working member 3. Located in it are spring-loaded rotatable stopping pins 4 and spring-loaded stopping keys 6, 7 which at one side are provided with comb created by stems, and at other side they have stopping tooth 33. Made in internal surface of body 1 are limiting longitudinal slots 11 with their cross-sectional profile being in the form of sector-like pockets. Also installed in core is protective pin made of material featuring higher resistance to mechanical abuse. Pin has tapered working end circular groove. Aforesaid embodiment widens functional potentialities of lock due to its higher reliability and secrecy. This is achieved due to possibility of stepped operation from at least two standard keys with different coding combinations and also due to combined protection from unauthorized opening. EFFECT: higher efficiency. 3 cl, 14 dwg