Abstract: A lock cylinder includes a housing, in which a sleeve having a cylinder core accommodated therein is rotatably supported. The cylinder core has spring-loaded tumblers forming a form closure with recesses arranged in the sleeve when a key engaging the tumblers is removed. Inside the housing, the sleeve is coupled to a coupling element by means of a disengaging sleeve. The coupling element is supported inside the housing and connected to a bearing in a rotationally-fixed manner. The bearing supports an output element. At least one of the sleeve and the coupling element forms a form closure with the bearing to block the rotation of the output element if an improper object is used in operative connection with the cylinder core.

Abstract: Disclosed is a device for starting and operating an engine in a motor vehicle. Said device comprises an ID generator (20) which can be inserted into a stationary receptacle of the motor vehicle and is provided with an engaging means (25.1, 25.2) on at least one sidewall. At least one lever (30.1, 30.2) of the first class that encompasses a retaining arm and a control arm (32.1, 32.2) is used for retaining the ID generator (20) in the receptacle. The retaining arm is fitted with opposite engaging means (25.1, 25.2) while the control arm (32.1, 32.2) is equipped with a control point for the swiveling movement of the lever (30.1, 30.2) as well as a locking point (34.1) for a locking device which secures the inserted position of the ID generator (20). In order to embody the inventive device in a compact manner, a stationarily pivot-mounted elbow lever (30.1, 30.2) whose control arm (32.1, 32.2) extends perpendicular to the direction of insertion of the ID generator (20) is used in the receptacle.