OPERATING MECHANISM OF BLOCKING LOCK Russian patent published in 1998 - IPC

FIELD: locking devices. SUBSTANCE: mechanism has body and installed in it is rotatable shaft with head. Located around it and over its perimeter coaxially with longitudinal axis of lock are spring-loaded stems which cooperate with key. Lock body is provided with protection setup which is made in the form of cap with spring-loaded turnable end leaf installed in end of body and countersunk in it. Made in outer side of body over its end face is setting flange and its external side surface has thread for outer fixing nut. This nut is provided with bush. End of bush directed towards setting flange has knurling. Installed coaxially in shaft head at side of key location is cylindrical head-piece which by its end surface is in contact with end of key. Cylindrical surface of head-piece is in contact with adjacent surface of spring-loaded stems. Ends of stems, end surface of head, and circular protrusion of body at inner side create together operating seat for key. EFFECT: higher efficiency. 2 cl, 5 dwg