SECRECY UNIT FOR SLIDE-TYPE LOCK Russian patent published in 2004 - IPC

FIELD: locks, particularly slide-type mortise and hasp locks for high-strength doors.

SUBSTANCE: secrecy unit comprises bar having depressions on sides thereof. Depressions cooperate with key bits. Unit has cut for locking rod, a number of movable half-slides arranged between depressions and having locking semi-openings cooperating with locking rod. Each half-slide has at least two openings for compression springs installation. Length of one opening exceeds length of another opening and difference between opening lengths is equal to working half-slide stroke taking into consideration possibility of re-lifting thereof. One depression section has similar depression located on half-slide edges. Another depression section has code punching which is individual for each half-slide. Each next half-slide is laid on previous half-slide by rear side thereof and placed on the same guiding rods to create full code combination corresponding to all key half-turns, common locking window with a number of extensions for cooperating with locking rod and similar through openings for compression spring installation.

EFFECT: increased secrecy, reduced material consumption, decreased labor intensity, improved consumer properties.

5 dwg