Abstract: The profiled cylinder (38) seated in an insertion opening (87) of the lock housing (7) is guided by a retaining bracket (93) and fixed centrally by a detent pin (121) on the retaining bracket (93). The detent pin (121) is guided displaceably on a slide piece (103) and initially stressed by a spring (131) towards the profiled cylinder (38). The profiled cylinder (38) contains a reading device for en electronic key, which device is connected through a plug-in connection (89) with an electronic circuit of the lock. The plug-in connection (89) and the detent pin (121) are so adapted to one another that the detent pin (121) firstly fixes the profiled cylinder (38) on the pedestal (93) before the slide piece (103) guided in centered manner in relation to the pedestal (93) closes the plug-in connection (89). In this way defects of alignment of the plug-in connection (89) and damage to its contact elements (107, 109 ) are avoided.

Abstract: A video system comprising a video camera and a recording device to record video signals obtained by the video camera, wherein the recording device starts functioning with a plurality of different delay times based on operating instructions to the video camera.