COMBINATION LOCK Russian patent published in 1994 - IPC

FIELD: home appliances. SUBSTANCE: lock comprises axle 2 installed in cylindrical body and carrying free-mounted code discs 3. Surface of each disc is provided with a recess 6 and a pin 8 for interaction with similar pin of adjacent disc. Disc 9 installed on axle end is pressed by spring 10 against sleeve 11 whose end face is provided with scale 16. Sleeve 11 has cutout for the key 14 which interacts with disc 9. Projections 12 of disc 9 can interact with slots 15 of body 1. The latter has radial holes 17 positioned circumferentially opposite discs at a certain pitch while holes 17 are disposed opposite holes in sleeve 11 which are provided with plugs 19 having a flat cut. One hole in each row is closed by plug 20 with recess 25 for holding a lock ball 21. Body 1 can turn in cylindrical sleeve 11. Axle 2 is rigidly fastened to body 1 and connected with locking bolt 22 by means of pin 23 fastened on axle end which is opposite to disc 9. EFFECT: improved reliability and secrecy of lock. 3 dwg