Abstract: A changeable lock assembly suitable for re-keying a lock without disassembly of the lock. The assembly includes a housing having a bore therein, and a plug rotatably mounted in the bore. The plug includes a longitudinal axis and a keyway. The keyway is adapted to receive at least a first user key and a second user key. The lock further includes a change member movable within the lock between a first position to a second position. The change member can move solely in response to operation of the second key. Thus, when the change member is in the first position, the first key operates the lock, and when the change member is in the second position, the first key does not operate the lock. The lock assembly can also employ a change tool that, when inserted into a change slot, can move a change ball from the second position back to the first position.

Abstract: A key-operated lock that can be programmed for use with one of a plurality of user keys without disassembling the lock or replacing the tumblers. The lock operates with a user key so that the lock plug turns only in one direction to unlatch or unbolt, and can not operate or rotate in the opposite direction. The lock also cannot be programmed or reconfigured with an operable user key. The lock is typically manually latched or bolted into a locked configuration. The lock is configured to permit rotation in the opposite direction only when using a programming key, which can reconfigure or program the lock for use with another user key.

Abstract: A changeable lock assembly suitable for re-keying a lock without disassembly of the lock. The assembly includes a housing having a bore therein, and a plug rotatably mounted in the bore. The plug includes a longitudinal axis and a keyway. The keyway is adapted to receive at least a first user key and a second user key. The lock further includes a change member movable within the lock between a first position to a second position. The change member can move solely in response to operation of the second key. Thus, when the change member is in the first position, the first key operates the lock, and when the change member is in the second position, the first key does not operate the lock. The lock assembly can also employ a change tool that, when inserted into a change slot, can move a change ball from the second position back to the first position.

Abstract: An adaptable lock 10 assembly and a method of using the lock 10 assembly in order to reprogram a lock 10 to accept a key different from the key which originally operated the lock 10. The lock 10 assembly includes a housing 12 with a bore 14 disposed through the housing 12 and a plug 16 rotatably mounted in the bore 14. The plug 16 includes at least one radial slot 18 which is disposed in the plug 16 along the circumference of the plug 16. The plug 16 further includes a longitudinal slot used as a keyway 22 which is adapted to receive a key. The assembly further includes first and second radial tumblers 30, 32 which are disposed in the radial slot 18 and are capable of being in an engaged or disengaged relationship. The distal ends of the first and second radial tumblers 30, 32 extend into the keyway 22 to provide a pattern of ridges along the longitudinal inner walls of the keyway 22. When the first and second radial tumblers 30, 32 are engaged in a first position, a first key 24 fits the lock 10.

Abstract: An adaptable lock 10 assembly and a method of using the lock 10 assembly in order to reprogram a lock 10 to accept a key different from the key which originally operated the lock 10. The lock 10 assembly includes a housing 12 with a bore 14 disposed through the housing 12 and a plug 16 rotatably mounted in the bore 14. The plug 16 includes at least one radial slot 18 which is disposed in the plug 16 along the circumference of the plug 16. The plug 16 further includes a longitudinal slot used as a keyway 22 which is adapted to receive a key. The assembly further includes first and second radial tumblers 30, 32 which are disposed in the radial slot 18 and are capable of being in an engaged or disengaged relationship. The distal ends of the first and second radial tumblers 30, 32 extend into the keyway 22 to provide a pattern of ridges along the longitudinal inner walls of the keyway 22. When the first and second radial tumblers 30, 32 are engaged in a first position, a first key 24 fits the lock 10.