BLOCKING SYSTEMS AND CODE LOCKS

摘要

Blocking systems which block the door with the door frame. They are operated by radio control by dialing a code on a pocket dial. The portions of the bars which block the door have cut out sections or shapes which match the shapes which belong to the part of the system which is in the door frame. The interpositioning of a small bar at the rear of the main bars block the return of those bars upon a break-in attempt. For an alternative comprised of a central bar and of two side bars, the return stroke of the central bar makes possible, due to the bevelled cuttings of said bars, the deployment of the side bars which block the system together with the door frame. Code locks are characterized by the obstruction of the keyhole. Other code locks operate with leads (optical fiber image guides) which transmit the code which is on the key and control the locking or unlocking after decoding. The locking of said locks is achieved with or without obstruction of the keyhole.