LOCK WITH TWO KEYS Russian patent published in 1998 - IPC

FIELD: locking devices. SUBSTANCE: this device ensures reliable locking. Lock has body which accommodates strip-like span-piece and two cylinder mechanisms with their cores provided with eccentric drivers of cylindrical configuration. One of cores is additionally provided with spring-loaded stop which is made in the form of cap with convex bottom installed in hole of turnable core symmetrically to its driver. Span-piece is made with two open rectangular cut-outs in edges parallel to its longitudinal axis. Seated in aforesaid cut-outs are drivers of turnable cores with possibility for reverse turning through 180 deg. and alternate interaction with edges of aforesaid cut-outs. Also provided is one trapezoidal cut-out with spring-loaded stop seated in it. EFFECT: higher efficiency. 12 dwg