Patent ID: 8677791
Filing Date: 2014-03-25
Classification: E05B,Y10T

Abstract:
1. A locking arrangement, comprising: a lock cylinder; and a matching key, the key having a flat key bit with a narrow spine, two broad sides which run substantially parallel to one another, and coding notches on a front, which is opposite the spine, at coding positions on the key bit, the lock cylinder having a cylinder housing, a cylinder core which is mounted in a bearing hole in the cylinder housing and which has a keyway for insertion of the key bit, tumblers which are located in core pin holes, which interact with the coding notches on the key bit, and which are disposed at coding positions on the cylinder, the coding positions coinciding with coding positions on the key bit when a locking bit is inserted as far as a stop in the keyway, and a sensing member which is located in a supplementary core hole that extends transversely relative to the core pin holes and senses a sensing point on a broad side of the key, a spacing, from the spine, of the sensing point on a broad side of the key being greater than the spacing, from the spine, of an apex of the coding notch that is cut-in to a deepest extent, the sensing point on the broad side of the key being situated close to a peripheral edge of the coding notch which is cut-in to a lesser extent than the coding notch that is cut-in to the deepest extent in such a way that deepening, of the coding notch which is cut-in to the lesser extent, to a depth of the coding notch that is cut-in to the deepest extent leads to disappearance of the sensing point from the broad side of the key so that the sensing point is located in the coding notch, wherein the supplementary core hole is arranged between two immediately adjacent core holes and the sensing member has a tip by means of which the sensing point on a broad side of the key situated between two immediately adjacent coding positions is sensed, wherein the coding notches each have an inward apex with the coding position at which the tumbler is located, the coding notches each having two liner flanks that are substantially parallel to the flanks of the other coding notches so that an angle of the two linear flanks of each coding notch is uniform for all the notches.