An anti-burglar bar (1) for rolling shutters (2) or rolling gates, which are defined by a plurality of horizontal slats (3) associated with a winding roller and are slidable in a first and a second vertical guides (4,5) opposite to one another, comprises electromechanical control means (7) of a first and a second blocking elements (8) and (9), arranged slidingly in a body (11), which engage respectively in a first and a second retention blocks (10) associated with said first and second guides respectively, a first and a second feelers (12) being provided which engage respectively with a first and a second position sensors (13) for transmitting an electric signal, said electric signal activating said electromechanical control means (7) only when said first and second feelers (12) are simultaneously aligned with said first and second position sensors (13) respectively.

The invention relates to a lock having a locking mechanism comprising a rotary latch and a pawl for locking the rotary latch in a locked position of the lock. An identification device for identifying a position of a moving component of the lock is provided. The identification device comprises a spring which is fitted to the component. The spring opens or closes an electrical circuit when the component and the spring which is connected to said component are moved. In this way, positions of the locking mechanism can be reliably determined, without having to worry about fatigue of the spring and associated problems.

The invention relates to a lock having a locking mechanism comprising a rotary latch and a pawl for locking the rotary latch in a locked position of the lock. An identification device for identifying a position of a moving component of the lock is provided. The identification device comprises a spring which is fitted to the component. The spring opens or closes an electrical circuit when the component and the spring which is connected to said component are moved. In this way, positions of the locking mechanism can be reliably determined, without having to worry about fatigue of the spring and associated problems.

A sensor, a wireless transceiver and a battery that energizes the transceiver are installed together in a cavity formed in a frame of a door. They are displaced together in the cavity in accordance with the deadbolt position in a direction of displacement of a door deadbolt. A spring that is installed in the cavity accommodates differences among travel distances and differences in lengths of different deadbolts and also differences in gaps between doors and door frames.