LOCK Russian patent published in 1999 - IPC

FIELD: locking devices. SUBSTANCE: lock is of higher protection against breaking open by skeleton-key, and it has operating mechanism and secrecy mechanism including following components: body which is adapted for turning, cylinder with protrusion, base, tail-piece. Made in lock body and cylinder are two main longitudinal passages. Seated in each of these passages with possibility of engagement with each other in initial position are code-receiving pin and two coding spring-biased pins. Also provided are coding balls located in longitudinal passages of body above coding pins, drum which is adapted for possible turning between cylinder and tail-piece, two spring-biased spools and coupling unit which is made in the form of ball and spring-biased rod which can engage with ball in initial position. Lock body is made with angle-setting slot, recess in end surface at side of cylinder and recess at side of drum. Cylinder has recess in end surface at side of drum and also has additional longitudinal passage. Drum is made with two main longitudinal passages, also with additional longitudinal passage, slot and recess in end surface at side of cylinder. Tail-piece has slot. Base is provided with bore at side of tail-piece and with recess at side of drum. Coding pins are made of two sizes and they differ by value of diameter of ball which is installed above them. First spring-biased spool is installed in additional longitudinal passage of cylinder and is adapted for alternate seating of ends of its rod in recesses of body and drum. Second spring-biased spool is installed in additional longitudinal passage of drum for possible alternate location of ends of its rod in recesses of body and base. Ball of coupling unit is seated in drum bore and is adapted for alternate positioning of half of its diameter respectively in recess of cylinder or in slot of tail-piece. Rod of coupling unit is installed in base bore which is located perpendicular to axis of tail-piece and to slot of tail-piece at initial position of lock. EFFECT: higher efficiency. 1 cl, 17 dwg