Abstract: The invention relates to a cross-sectional profile (1) for a flat key or the keyway of a cylinder lock, comprising a back surface (2), a first lateral surface (4) and a second lateral surface (4?), wherein the lateral surfaces (4, 4?) extend in the vertical direction to the back surface (2), the lateral surfaces (4, 4?) are arranged offset to one another by a distance (5), which varies along their extension, and the outline of the cross-sectional profile (1) defines a preferably substantially rectangular base profile (6), and wherein the lateral surfaces (4, 4?) each extend at least in sections along sinusoidal profiling lines (7, 7?), wherein the centerlines (8, 8?) of the profiling lines (7, 7?) lie within the base profile (6). Further, the invention relates to a flat key (16) with such a cross-sectional profile (1) and a cylinder lock with a keyway (13) for receiving such a flat key (16).

Abstract: The invention relates to a cross-sectional profile (1) for a flat key or the keyway of a cylinder lock, comprising a back surface (2), a first lateral surface (4) and a second lateral surface (4?), wherein the lateral surfaces (4, 4?) extend in the vertical direction to the back surface (2), the lateral surfaces (4, 4?) are arranged offset to one another by a distance (5), which varies along their extension, and the outline of the cross-sectional profile (1) defines a preferably substantially rectangular base profile (6), and wherein the lateral surfaces (4, 4?) each extend at least in sections along sinusoidal profiling lines (7, 7?), wherein the centerlines (8, 8?) of the profiling lines (7, 7?) lie within the base profile (6). Further, the invention relates to a flat key (16) with such a cross-sectional profile (1) and a cylinder lock with a keyway (13) for receiving such a flat key (16).

Abstract: The invention relates to a key (1) for locking a cylinder lock, comprising at least one first surface (2) and at least one second surface (2?), with sensing positions (4) provided along the longitudinal extent of the key (1), wherein at least one code (3) is provided on the first surface (2) and wherein at least one further code (3?) is provided on the second surface (2?), the codes comprising control points (6, 6?, 7, 7?) at the sensing positions (4) that are provided transversely to the longitudinal extent of the key (1) and arranged at certain control heights (5), wherein at least at one sensing position (4) at least one control point (25, 25?) has a different dimension, preferably a larger diameter, on the two surfaces than a control point (6, 6?, 7, 7?) at another sensing position (4). The invention also relates to a lock for such a key and a system made up of at least two locks and at least one key.

Abstract: The invention relates to a key (1) for locking a lock, comprising at least one first surface (2) and at least one second surface (2?), with at least one sensing position (4) provided along the longitudinal extent of the key (1), at which sensing position on the first surface (2) at least one first code (3) is provided for reading in the lock and/or at least one second code (3?) is provided on the second surface (2?) for reading in the lock, wherein at least one code (3) of the first surface (2) differs at least at one sensing position (4) from the second code (3?) at the same sensing position (4). The invention furthermore relates to a lock for a key of this type, and a system made up of at least two locks or lock groups and at least one key according to the invention.

Abstract: The invention relates to a key (1) for locking a cylinder lock, comprising at least one first surface (2) and at least one second surface (2?), with sensing positions (4) provided along the longitudinal extent of the key (1), wherein at least one code (3) is provided on the first surface (2) and wherein at least one further code (3?) is provided on the second surface (2?), the codes comprising control points (6, 6?, 7, 7?) at the sensing positions (4) that are provided transversely to the longitudinal extent of the key (1) and arranged at certain control heights (5), wherein at least at one sensing position (4) at least one control point (25, 25?) has a different dimension, preferably a larger diameter, on the two surfaces than a control point (6, 6?, 7, 7?) at another sensing position (4). The invention also relates to a lock for such a key and a system made up of at least two locks and at least one key.

Abstract: The invention relates to a key (1) for locking a lock, comprising at least one first surface (2) and at least one second surface (2?), with at least one sensing position (4) provided along the longitudinal extent of the key (1), at which sensing position on the first surface (2) at least one first code (3) is provided for reading in the lock and/or at least one second code (3?) is provided on the second surface (2?) for reading in the lock, wherein at least one code (3) of the first surface (2) differs at least at one sensing position (4) from the second code (3?) at the same sensing position (4). The invention furthermore relates to a lock for a key of this type, and a system made up of at least two locks or lock groups and at least one key according to the invention.

Abstract: The invention relates to a cylinder lock comprising housing pins (3) and cylinder core pins (4), wherein the cylinder core pins are formed on the end protruding into the key channel (7) as sensing extensions (8) that are narrower than the diameter of the cylinder core pin and are oriented in the longitudinal direction of the key channel, wherein at least two cylinder core pins have sensing extensions that are different from one another, arranged either centrally along the centre longitudinal plane of the key channel or offset at a distance parallel thereto and are intended for sensing milled incisions (17, 18) on the narrow side(s) (15) of the key, wherein approximately parallel core pin bores with resiliently prestressed core pins (6) that can be moved therein are provided on at least one side of the key channel, which pins have sensing lugs (9) protruding into the key channel and ending at a distance from the centre longitudinal plane for sensing milled incisions (16) at the edge(s) of the narrow side(s) of