A self-learning lock cylinder assembly or lock tumbler and tools capable of teaching the self-learning key configuration of a pre-existing key is disclosed. The assembly does not require disassembly and re-assembly of internal components by a skilled user. The individual performing the self-learning procedure sets the assembly by a simple rotation motion. The individual performing the self-learning procedure can verify that the original key and copies of the original key function properly within the lock cylinder prior to final assembly.

A rekeyable lock cylinder includes a plug body with a keyway opening along a longitudinal axis and a multiple of channels transverse to the axis. A rekeying feature located adjacent to the keyway opening.

A trapped key interlock system is disclosed. A pair of hollow tubular casings located one inside the other and each having a series of elongate slots are used. When the lock is in a locked condition the elongate slots are aligned as inner and outer pairs with engaging members extending through the pairs of slots is preventing rotational movement of the tubular casings relative to each other. The engaging members are biased towards this locked condition. On insertion of the correctly coded key the engaging members are caused to move against the biasing force out of engagement with the slots in the outer tubular casing thereby allowing the inner tubular casing to rotate relative to the outer tubular casing and moving the lock to an unlocked condition.

A rekeyable lock cylinder with a cylinder body and a plug assembly. The lock cylinder includes a plurality of key followers and a corresponding plurality of racks disposed in the plug assembly. The lock cylinder includes, for example, a locking bar for blocking rotation of the plug assembly with respect to the cylinder body to prevent unlocking of the rekeyable lock cylinder with an unauthorized object. In some embodiments, the locking bar is configured such that torqueing the plug assembly with an unauthorized object applies force to the locking bar without translating such force to the plurality of racks. This type of arrangement enhances torque resistance of the lock cylinder against attempted forced entry.

A self-learning lock cylinder assembly or lock tumbler and tools capable of teaching the self-learning key configuration of a pre-existing key is disclosed. The assembly does not require disassembly and re-assembly of internal components by a skilled user. The individual performing the self-learning procedure sets the assembly by a simple rotation motion. The individual performing the self-learning procedure can verify that the original key and copies of the original key function properly within the lock cylinder prior to final assembly.

A cylinder and key lock mechanism is unlocked when a specific combination of rotation angles of dialer groups, each constituted by one internal dialer disc and by one external dialer ring coupled through teeth, is dialed through rotation of the key having a formed cipher. A security mechanism, being part of the key and driven by the insertion of the key into the cylinder, enables re-programming. When unlocked and with re-programming enabled, re-programming is possible where the inner dialer discs are decoupled from the respective outer dialer rings, the key can be rotated driving only the inner dialer discs and extracted leaving the system in a re-programming configuration. A new key having a different cipher can be inserted and the system exited re-programming with a different coupling between the inner dialer discs and the respective outer dialer rings so that they couple with the new key cipher.

An arrangement for a lock is provided, comprising a stator, a rotor, which is rotatably arranged in the stator, and a set of elements arranged in the rotor for cooperating with the stator, which elements each have an opening and which elements are arranged successively in the longitudinal direction of the rotor and the openings of which together form a through hole for receiving a key, each of the elements being readjustably arranged, independently of each other, between a state which upon actuation is blocking and a state which upon the same actuation is releasing. The disclosure further concerns a key, which has a body along which a plurality of projections are arranged, the plurality of projections all being arranged in a common plane and the plurality of projections all having the same height and defining together the profile of the key.

A rekeyable lock cylinder with a cylinder body and a plug assembly. The lock cylinder includes a plurality of key followers and a corresponding plurality of racks disposed in the plug assembly. The lock cylinder includes, for example, a locking bar for blocking rotation of the plug assembly with respect to the cylinder body to prevent unlocking of the rekeyable lock cylinder with an unauthorized object. In some embodiments, the locking bar is configured such that torqueing the plug assembly with an unauthorized object applies force to the locking bar without translating such force to the plurality of racks. This type of arrangement enhances torque resistance of the lock cylinder against attempted forced entry.

A trapped key interlock system is disclosed. A pair of hollow tubular casings located one inside the other and each having a series of elongate slots are used. When the lock is in a locked condition the elongate slots are aligned as inner and outer pairs with engaging members extending through the pairs of slots is preventing rotational movement of the tubular casings relative to each other. The engaging members are biased towards this locked condition. On insertion of the correctly coded key the engaging members are caused to move against the biasing force out of engagement with the slots in the outer tubular casing thereby allowing the inner tubular casing to rotate relative to the outer tubular casing and moving the lock to an unlocked condition.

A sliding housing cooperates with various mechanisms designed to receive a programmable locking cylinder. Rotation of the key between locked and unlocked positions also urges protrusions associated with the locking cylinder into engagement with an annular groove in a pull pin to selectively fix the locking assembly to the pin.