KEY HOLE CLOSING DEVICE Russian patent published in 1999 - IPC

FIELD: hardware. SUBSTANCE: key hole closing device has code handle with marks and code mechanisms. Lock body has at least one conical opening positioned adjacent to key hole. Slide is provided with additional openings disposed adjacent to key hole, code mechanisms and attachment members. Each code mechanism is made in the form of U-shaped sleeve with bottom and flange. One through openings are formed in sleeve bottom and a lot of equally spaced through openings are formed along sleeve bottom periphery. Through openings are arranged in accordance with arrangement of marks on code handle. Pins are secured to code handle and inserted into bottom peripheral openings. Sleeve is fastened to code handle by means of through opening and screw. Slide with tongues is positioned between lock body and sleeve flange. Slot is made in sleeve surface in the vicinity of flange. Attachment members are partially positioned in openings made in slide and plate. Body surface is provided with additional marks. Construction of lock and key hole allows unauthorized access to be prevented. EFFECT: enhanced reliability in operation and increased secrecy extent. 3 cl, 3 dwg