Abstract: A turnstile comprising means for dictating a person entering or exiting the lane, a barrier positioned to move between a position blocking a lane and a position where it allows passage through the lane, under control of a motor; means for checking the credentials of a person attempting to pass through the lane and a brake, the turnstile having a mode of operation in which in the event that a user enters an exit side of the lane without presenting a credential, and an authorized person is not detected on the entry side of the lane, the brake is unlocked and the barrier is held in position in a closed mode but is able to be pushed or pulled by the person who has entered from the exit side in order for that person to exit; and the motor assists movement in the pushing or pulling direction by moving the barrier at a controlled speed, less than a speed at which it operates the barrier if the exiting user presents a credential.

Abstract: A turnstile comprising means for dictating a person entering or exiting the lane, a barrier positioned to move between a position blocking a lane and a position where it allows passage through the lane, under control of a motor; means for checking the credentials of a person attempting to pass through the lane and a brake, the turnstile having a mode of operation in which in the event that a user enters an exit side of the lane without presenting a credential, and an authorised person is not detected on the entry side of the lane, the brake is unlocked and the barrier is held in position in a closed mode but is able to be pushed or pulled by the person who has entered from the exit side in order for that person to exit; and the motor assists movement in the pushing or pulling direction by moving the barrier at a controlled speed, less than a speed at which it operates the barrier if the exiting user presents a credential.

Abstract: An access control or monitoring system, comprising means for transmitting an electromagnetic signal across a space (Tx); means for receiving said signal (Rx), the two means being disposed across a doorway in which a door (1) is located; means for using the received signals to monitor access through the doorway, and means for controlling or monitoring the opening, locking or unlocking of the door by said apparatus.