COMBINATION MECHANISM OF HIGH RESISTANCE TO BREAKING-IN Russian patent published in 2003 - IPC

FIELD: locking devices applicable in residential and public buildings and characterized by absence of keyhole and possible multiple rearrangement of key and lock code. SUBSTANCE: combination mechanism has mushroom-shaped member installed for longitudinal motion and consisting of rod and flange made of magnetically permeable material. Located in place of rod-flange joint and round it are freely rotating balls. Rod and hole in cage center have cross-section of regular polygon with number of faces other then that of blocking members. Installed in chaotically located cage holes between internal surface of flange and blocking member tightly are plugs of magnetically permeable material. Located in holes of inserts for blocking members are spring-loaded pushers of blocking members. Made round said holes are hollows-traps. Blocking members are used in form of bodies of revolution whose generating lines are parallel or inclined at some angle. EFFECT: extended service potentialities. 5 dwg