GARAGE CODE LOCK Russian patent published in 1997 - IPC

FIELD: locking devices. SUBSTANCE: lock has six suvalds each having cutout with slots on side edges for installation of coding plates. Plate in each suvald has 18 versions of installation with full use of which, it is possible to successively assemble 34 millions of unique locks. Suvalds have five-fold protection from skeleton keys and foreign keys, which are attained by means of parts 4,6,7,11 and 22, in this case, some of them are of double application. Por instance, protection 4 serves for suvalds as guide limiter, spacers 7 prevent plates 6 from turning to form a gap between them which contributes to normal sliding of pins of key bit., and ends of spacers facing cross-bar prevent action of skeleton keys on suvalds. Bit for motion of cross-bar is made separate from key and mounted into body keyhole, and in position LOCKED prevents penetration of skeleton keys to suvalds. Limiter is secret and its size is preset by owner and remains secret for foreigner. Key bit is assembled of semicylindrical pins, which, when pressed-on, fix one another and tightened in keyhole. To adjust key bit for selected version of combination, lock mechanism has coding system in which code plates 6 are installed in full compliance with installation of same plates in suvalds. Lock has small suvald which fixes cross-bar in cases whenever pressing out of main suvalds exceeds rated value amounting to 0.2-0.3 mm. Lock is provided with installation parts forming socket in wood door for mortise lock, which may be welded to metal door. Lock in socket is secured by two screws and may be easily taken out. EFFECT: higher efficiency. 2 cl, 9 dwg