Abstract: A removable core lock and key device comprises a cylinder housing (3), a cylinder core (10) accommodated in said cylinder housing, and an essentially cylindrical plug (20) rotatably arranged in the core. A blocking pin (28) is provided in the core and is movable between an extended position, wherein it engages a recess in the cylinder housing, and a retracted position. An actuator element (26a, 26c) is controlled by at least one control pin tumbler. With a control key in the lock, the control pin tumbler displaces the actuator element so that it moves the blocking pin with the rotation of said plug. With a user key in said key slot, said pin tumbler is disengaged from the actuator element and the plug is free to rotate. In other positions the control pin tumbler blocks rotation of the plug and actuator element. A simple yet reliable and secure removable core arrangement is provided.

Abstract: A key safekeeping device for fitting into a hole in a door, wall or corresponding structure includes a first tubular element (10) that carries a first collar (12) on an outer end thereof. A lock cylinder (14) is detachably fitted to the first tubular element. A second tubular element (20) that carries a second collar (22) is intended for lockable engagement with the first tubular element. At least one of the collars is comprised of a separate ring-shaped part (22) that includes an internal aperture for receiving a blocking means (24) in the form of a bent/curved element that is intended to be fitted into a peripheral groove (20c) in the barrel surface of the second tubular element. The blocking element, which lies hidden in the aperture of the ring-shaped part, cannot therefore be removed when the key safekeeping device is fitted and the lock cylinder is mounted in place.

Abstract: A cylinder lock (1) comprises a cylinder housing (2), a plug (3) having a key slot (3c), and a driver (20). The cylinder housing (2) has a row of pin channels in a “twelve o'clock” position and a row of pin channels in a “ten o'clock” position, to enable the lock to be operated with a service key that can be inserted in the “ten o'clock” position. A cylindrical latching element (15) surrounds the inner end of the plug and moves in accompaniment with rotation of the plug as the plug is turned with a standard key (8). The latching element (15) is held fixed when the plug is rotated by means of a service key (9). The latching element is designed to co-act with means on the driver that enable the plug (3) to move axially upon transition of the “twelve o'clock” position, wen the plug is rotated by means of the service key. The latching element is held fixed in relation to the housing (2) by means of an intermediate pin (6).