A plug assembly including a plug, a sidebar movably mounted on the plug, and a plurality of rack pins seated in the plug. The sidebar is biased to an outer position in which the sidebar extends beyond an outer surface of the plug. Each rack pin includes a key-following leg and a sidebar-engaging leg. The sidebar-engaging leg includes at least one true gate. When a true gate of each rack pin is aligned with the sidebar, the sidebar is free to move radially inward to an inner position.

A padlock with an associated locking mechanism is configured for use in a lock configured to be locked and unlocked by a key. The locking mechanism includes a lock cylinder with a key-receiving end configured to interface with the key and further includes a cam positioned at an axial end of the lock cylinder opposite the key-receiving end thereof. The cam is integrally connected thereto thereby restricting axial and rotational motion of the cam with respect to the lock cylinder and can be used to retain components of the locking mechanism (such as tumblers and springs) in the lock cylinder.

A key for controlling a lock with a cylindrical plug, where the body of its shank (10) is at least in a part of its length formed by a hollow, partially enclosed profile, the external rounded surface of which (16) is shaped for turning the key in the lock cavity, while at least in the end part (12) of the lateral section of the shank (10), an open cavity is created for inserting an arm of the validating lever (5) of the lock. At least a part of the shank (10) is created in the U- or V-shape, while in at least one such part of the shank (10), the bottom and/or the wall of the inner and outer arch of the shank (10) is fitted with at least one open coding track (9) and/or at least one coding channel (18) with a shaped coding surface. The lock for validating the key contains at least one cylindrical plug (1) rotatable in its housing (2), where in the plug body (1), a sprung sidebar (3) of the lock is situated in its outer longitudinal groove, pushed to the inner surface of the housing (2). The sidebar (3) is adapted for inserting into the turning validating levers (5) that are arranged in a row in the longitudinal axis of the plug (1) on the pivot in the plug (1) and they are located in the lateral slots (6) along the plug's (1) length. These validating levers (5) are in case of incorrect coding of the key (11) in a blocked functional state in a position preventing the inserting of the sidebar (3) into the groove (23) in the plug (1), and thus the turning of the plug (1) inside the housing (2) of the lock, while in the unblocked state in case of correct coding of the key (11), they are in the functional position allowing for the movement of the sidebar (3) in the direction into the groove (23) in the plug (1) and thus the turning of the plug (1) inside the housing (2) of the lock. The validating levers (5) at least partially protrude into the cavity of the key (11), by which they allow for achieving contact between the validating levers (5) and code carriers, which are the coding tracks (9) or channels (18) in the key (11).

Embodiments of the present invention are directed to merchandise display systems and methods for displaying an article of merchandise. In one example, the system includes a sensor configured to be secured to the article of merchandise. The system also includes a base configured to removably support the sensor thereon. The base includes a lock mechanism configured to lock the sensor to the base.

An exemplary lock cylinder includes a shell, a plug positioned in the shell, and a locking assembly. The locking assembly is configured to prevent rotation of the plug when no key is inserted, and to permit rotation of the plug upon insertion of any of a plurality of keys having different bitting profiles. The locking assembly may further be configured to prevent key extraction when the plug is in a rotated position.

A linearly-actuated lock including a housing, a lock case received within the housing along an axis, and a lock barrel rotatable relative to the lock case between a locked state and an unlocked state. The lock barrel includes tumblers and tumbler springs. The lock further includes a key insertable into the lock barrel to displace the tumblers relative to the lock barrel in a direction parallel to the axis and a sidebar extending through apertures of the lock barrel. The sidebar is engageable with a notch of the tumblers when the sidebar moves radially inward relative to the axis. The sidebar includes a cam surface slidable against at least one of the housing and the lock case when the lock barrel rotates. The sidebar also includes a projection having a single-ramped surface received within the notch of each tumbler when the lock barrel is in the unlocked state.

A combination of a disc tumbler cylinder lock and a key. The disc tumbler cylinder lock includes rotation limiting device for the key and a guiding element. The key includes grooves for the guiding element, which has two rails making up some of said rotation limiting device, and both of the rails include at least one limiter protrusion arranged to facing inward in the disc tumbler cylinder lock. The key includes at least one recess for the limiter protrusions. The rotation limiting device further includes a front guide having the rails in association therewith. The front guide and the rails are arranged to allow the key, which is in a basic position in the disc tumbler cylinder lock, to be turned for releasing the locking of the disc tumbler cylinder lock.

A lock has a locked condition and an unlocked condition comprising a barrel with a circular bore having three splines. A cylindrical plug is adapted to reside in the bore. First, second and retaining tumblers are positioned in tumbler slots, with the first and retaining tumblers biased in one direction toward the first spline and the second tumbler biased in the opposite direction into the second spline. When a first key is inserted, the first and second tumblers are moved against the bias so they retract from the respective splines and the plug can be rotated from the locked and unlocked conditions. When a second key is inserted while in the unlocked condition, the first, second and retaining tumblers are moved so the respective tumblers are either positioned in the third longitudinal spline or fully retained in the plug and the plug can be retracted axially from the barrel.

A lock has a locked condition and an unlocked condition comprising a barrel with a circular bore having three splines. A cylindrical plug is adapted to reside in the bore. First, second and retaining tumblers are positioned in tumbler slots, with the first and retaining tumblers biased in one direction toward the first spline and the second tumbler biased in the opposite direction into the second spline. When a first key is inserted, the first and second tumblers are moved against the bias so they retract from the respective splines and the plug can be rotated from the locked and unlocked conditions. When a second key is inserted while in the unlocked condition, the first, second and retaining tumblers are moved so the respective tumblers are either positioned in the third longitudinal spline or fully retained in the plug and the plug can be retracted axially from the barrel.

An exemplary lock apparatus includes a housing and a plug assembly rotatably mounted in the housing. The plug assembly includes a tumbler assembly operable to selectively prevent rotation of the plug assembly relative to the housing and a retention mechanism operable to selectively prevent removal of the plug assembly from the housing. A system including the lock apparatus may include a change key configured to actuate the tumbler assembly without actuating the retention mechanism and/or a control key configured to actuate both the tumbler assembly and the retention mechanism.