Patent ID: 6201317
Filing Date: 2001-03-13
Classification: B60R,E05B,G07C

Abstract:
Device with a key-operated lock cylinder (10) and with an electric switching device,wherein the electric switching device activates or deactivates certain electrical functions, in particular electronic anti-theft measures for a motor vehicle, as a function of the rotation of the key (23);wherein the lock cylinder (10) consists of a stationary cylinder housing (11) and a cylinder core (12), supported in the housing with freedom of rotation;wherein, in the interior of the cylinder core (12), in addition to tumblers (14) to prevent the core from turning in the cylinder housing (11), a key channel (13) is also provided to accept the key (20) which can unlock the cylinder core (12);wherein at least one permanent magnet (32) is mounted on the circumference (19) of the cylinder core (12);wherein, in the cylinder housing (11), in addition to at least one locking channel for the tumblers (14), at least one sensor (35) is also provided, which responds to the permanent magnet or magnets (32) on the cylinder core; andwherein the sensor (35) is connected to an evaluator (40), the sensor (35) responding by activating the switching device by way of the evaluator (40) when the lock is actuated by the key,whereina group of different cylinder cores (12) is assigned to the cylinder housing (11) with a sensor (35) in a predetermined, fixed location;wherein, although the cores have the same tumblers (14) and can be actuated by the same key (20), they differ from each other magnetically with respect to one at least one of the permanent magnets (32);wherein, for each application of the device, one cylinder core (12) is selected from this group and paired with the cylinder housing (11) to form a magnet-specific lock cylinder (10), which, because of the selected cylinder core (12), forms a lock cylinder (10) with a specific magnetic code;wherein the sensor (35) detects the magnetic differences in the magnetic code upon operation of the cylinder core (12) by the key;wherein the evaluator (40) can be set or programmed for the specific magnetic code of the lock cylinder (10) used in the device; andwherein, after this setting or programming, the evaluator (40) will respond by actuating the switching device upon operation (23) of the key only when the selected cylinder core (12) upon which the magnetic code is based is in the lock cylinder (10).