Device for determining the side from which a key is inserted into a lock

摘要

The subject matter of the invention is a device for determining the side from which a key (10) is inserted into the lock of a door, an appropriate message being transmitted to a remotely arranged monitoring point. A transmitter (4) and a receiver (5) of a beam barrier (6, 13) are arranged on at least one side of the door leaf (15) in or on the cover (2) which surrounds the locking cylinder (1) or the keyhole. The ray being emitted by the transmitter (4) is affected by insertion of the key (10) into the locking cylinder (1) or the keyhole, and the beam barrier (6, 13) is actuated. IMAGE