A key blank for manufacturing a key for a disk cylinder having rotatable disk tumblers has a key shaft that extends along a longitudinal axis. The key shaft further has a plurality of notches that extend transversely to the longitudinal axis, that extend at equal spacings from one another, and that have the same depth. In a key, these notches may form chamfers of drive slopes for driving the disk tumblers.

An exemplary system includes a mechanical key and an access control device. The access control device includes a housing defining a keyway that has a fixed position within the housing. The access control device further includes a root depth sensor assembly, an insertion depth sensor assembly, a control assembly in communication with the sensor assemblies, and an electronic lock device. The control assembly is configured to determine the bitting code of the mechanical key based upon information received from the sensor assemblies, to compare the bitting code of the mechanical key to a lock/unlock bitting code; and to transmit a lock/unlock command in response to the bitting code matching the lock/unlock bitting code. The electronic lock device is configured to transition between a locked state and an unlocked state in response to receiving the lock/unlock command and without requiring rotation of the mechanical key.

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.

Locking systems allow for the unlocking and locking of, e.g., doors, containers, and enclosures. Lock cylinders are coded to specific keys, and often there is a desire to have a key be able to access a subset of lock cylinders. Keys are coded using bitting to gain access to specific lock cylinders. It is with respect to these and other general considerations that embodiments have been described.

A passive radio transmission device is arranged on a front and a back of an electrically conductive carrier plate, wherein the radio transmission device includes, on the front of the carrier plate, a first film having a first antenna and having a microchip coupled to the first antenna and, on the back, a second film having a second antenna, wherein the first film is coupled to the second film via a flexible web, routed around an end face of the carrier plate, that connects the front to the back, so that the second antenna is connected to the first film via at least one connecting line running along the web in order to transmit information from the microchip using both the first antenna and the second antenna, wherein the first film, the second film and the web are combined as one component.

Locking systems allow for the unlocking and locking of, e.g., doors, containers, and enclosures. Lock cylinders are coded to specific keys, and often there is a desire to have a key be able to access a subset of lock cylinders. Keys are coded using bitting to gain access to specific lock cylinders. It is with respect to these and other general considerations that embodiments have been described.

A method for mutually controlling and unlocking a dual plug in a lock, comprising: unlocking a code of a first plug first, the first plug restricting unlocking of a second plug, the second plug restricting rotating of the first plug before the code of the first plug is unlocked; after unlocking the code of the first plug, the first plug translating to a second position from a first position using a preset position difference, the first plug being unable to rotate during the translation; after moving the first plug to the second position, the first plug releasing a restriction on the second plug, the second plug still restricting the rotating of the first plug; and unlocking the code of the second plug, the first plug and the second plug being able to rotate synchronously so as to unlock the lock after unlocking the code of the second plug. The present invention further relates to a lock with a dual plug.

A method for mutually controlling and unlocking a dual plug in a lock includes: unlocking a code of a first plug first, the first plug restricting unlocking of a second plug, the second plug restricting rotating of the first plug before the code of the first plug is unlocked. after unlocking the code of the first plug, the first plug translating to a second position from a first position using a preset position difference, the first plug being unable to rotate during the translation; after moving the first plug to the second position, the first plug releasing a restriction on the second plug, the second plug still restricting the rotating of the first plug; and unlocking the code of the second plug, the first plug and the second plug being able to rotate synchronously so as to unlock the lock after unlocking the code of the second plug.

The locking device includes a key having a cylindrical shaft in which a guide groove is formed in the axial direction, and a cylinder lock which includes an outer cylinder, an inner cylinder, a locking bar and a tumbler, the inner cylinder has an inner cylinder main body rotatably accommodated in the outer cylinder, a rod fixed to the inner cylinder main body, and a key insertion slot, the locking bar is interposed between the inner cylinder main body and the outer cylinder and prevents the rotation of the inner cylinder by engaging and disengagingly locking the inner cylinder main body and the outer cylinder, and the tumbler has a guide convex portion engageably and detachably engaged with the key groove, and an inner concave portion rotatably received in the inner cylinder and dropping the locking bar.

A portable device executes wireless communication with an in-vehicle device in a vehicle to thereby permit the in-vehicle device to perform control relating to locking or unlocking of a door in the vehicle. The portable device includes a circuit board on which a function for executing control is mounted, a housing, and a side cover. The housing is achieved by combining an upper case and a lower case configured to separate in an up and down direction that is a direction orthogonal to the circuit board. The side cover is attached to a side surface on an outside of the housing to bring the upper case and the lower case into close contact with each other.