TYPE FREEBLOCK SECRET MECHANISM OF ENHANCED RESISTANCE TO BREAKING IN Russian patent published in 2003 - IPC

FIELD: locksmith's work. SUBSTANCE: the mechanism has a body having an outer flange and blocking members of magnetosoft material, the body outer flange has a hole in the form of a geometric figure asymmetric relative to one axis, the body accommodates a spring-loaded head of magnetopermeable material for longitudinal movement, having a head rod and inserts tightly located around the latter, tightened by a spring on the periphery, with holes for the blocking members, and a tab of magnetopermeable material is tightly installed between the inner surface of the head flange and the blocking member. EFFECT: enhanced resistance to breaking in. 6 dwg