– a mechanical, electrical, hydraulic or electronic device designed to prevent entry into a building, room and container or hiding place and to prevent the removal of items without the consent of the owner
LOCK
PETERMAN
TYPES OF LOCKS:
PADLOCK
WARDED LOCKS/ WARD LOCK
DISC TUMBLER LOCKS
DISC TUMBLER LOCKS
DISC TUMBLER LOCKS
LEVEL TUMBLER LOCKS
LEVEL TUMBLER LOCKS
COMBINATION LOCKS
CODE-OPERATED LOCKS
CODE-OPERATED LOCKS
-are devices holding the door by magnetism
ELECTROMAGNETIC LOCKS
CARD OPERATED LOCK
TYPES OF KEYS
KEY
CHANGE KEY
-It is a specific key, which operates the lock and has a particular combination of cuts, or battings, which match the tumblers of the tumblers in the lock.
CHANGE KEY
SUB-MASTER KEY
MASTER KEY
GRAND MASTER KEY
-all locks operated by change key
GREAT GRAND MASTER KEY
are used in great large complex system similar to three levels
Example: Big Universities, Complexes, Large Industrial Complex
GRAND MASTER KEY and GREAT GRAND MASTER KEYS