Abstract: Pin tumbler locks are provided that include features for detecting tampering. Tampering may be detected in a number of different ways. As an example, abnormal movement of one or more of the driver pins in a pin tumbler lock can be an indication of tampering. In addition, one or more sensors can be included at the end of a keyway that detect picking or bumping beyond the length of normal key insertion. A mechanical actuator can be used for detection.

Abstract: A key whose blade includes axially a window forming an opening throughout the thickness of the blade between two opposite faces thereof, and a set of rollers mounted in series along the windows with each roller being mounted freely rotating around a spindle fixed transversal to the window. The key could concern security keys designed to cooperate with a pin tumbler cylinder.

Abstract: A rotary locking cylinder includes a housing and a rotor mounted therein. Furthermore, tumblers influencing the combinatorics each have a core pin, a housing pin, and a key channel incorporated into the rotor. The tumblers are arranged in the keyway by inserting the security key. The at least two tumblers are mechanically controlled by the security key so that they are arranged radially in different directions. At least one of the tumblers is pulled against the keyway by the security key for arrangement. Furthermore, the at least one tumbler is struck and arranged by a front key tip of the security key.

Abstract: A lock includes a stationary key mass having a key mass bore and a keyway, and a movable spring mass having a spring mass bore. A spring mass pin is mounted in the spring mass bore, and a key mass pin is mounted in the key mass bore for reciprocation between a locked position immobilizing the spring mass and an unlocked position unconstraining motion. The unlocked position is a function of the presence of a matching key in the keyway. Multiple key mass and spring mass pins can be used, and some can have stepped configurations. Corresponding single-bladed or multi-bladed keys, or multiple keys, can be used. The keys can be straight or curved or flexible to match curved keyways.

Abstract: A thin lock has a housing, a core assembly mounted in the housing, multiple pin assemblies arranged longitudinally in the core assembly, and a latch assembly mounted through the housing and selectively activates the core assembly and the pin assemblies. Thus, when the thin lock is mounted on a door panel, numbers of the pin assemblies does not relate to a thickness of the door panel. Therefore, the numbers of the pin assemblies are able to be added to increase the complexity and enhance the safety of the thin lock according to user's need.

Abstract: A multifunctional lock comprises a lock shell (1), a lock bar (3), movable tooth pieces (4), a support (5) for sliding blocks, sliding blocks (6) and a guide slot unit (8) for the insertion of a key. Wherein, an elastic element is provided between the lock bar and the support, the sliding blocks at least partially extend into the keyway of the unit. When the lock is unlocked, a projection of the unit has two operating positions, in one of which the projection is received into the cut of the shell and the upper teeth of the tooth pieces disengage from the bottom teeth of the sliding blocks, in another it is out of the cut and the upper teeth engage with the bottom teeth. The key of the lock can be changed many times.

Abstract: The cylinder lock assembly includes a cylindrical lock housing having an inner core extending between first and second ends. The inner core defines a core axis extending through the first and second ends. A lock cylinder is received in the inner core for rotational and axial movement in the inner core. The lock cylinder includes an axially extending key slot for receiving a key therein and a radially extending slot extending through the lock cylinder and intersecting the key slot. A rotation plate assembly is received in the radially extending slot and blocks at least a portion of the key slot. The rotation plate includes first and second rotation plate members which are movable relative to each other. A first biasing member engaging the first and second rotation plate members urges the second rotation plate member radially away from the first rotation plate member.

Abstract: A mechanical card lock is disclosed which allows for simple, reliable operation. User cards 221 are engaged by a set of plates 360, which upon operating the lock assume a configuration for mating with a previously inserted combination card 244. The lock can be rekeyed by replacing the combination card 244.

Abstract: A pick-proof lock is provided which is rendered difficult or impossible to pick not by virtue of any additional structure or apparatus but due to the intrinsic nature of the tumbler construction wherein all of the tumblers in the row of tumblers are contiguous with adjacent tumblers so that the tumblers may not be individually set by using a pick and the equivalent of a tension wrench because there is no stationary shear plane in the direction of movement of the bolt for the tumblers to be set on.

Abstract: A guard mount structure for a dead bolt installation on a door has a preassembled condition wherein a dead bolt subassembly consisting of a housing and a dead bolt shaft is attached to a sheet metal guard. The sheet metal guard has opposite plates for attachment to opposite faces of the door and an end plate overlying the end face of the door, the housing of the dead bolt subassembly being attached to the inside face of the end plate.