Abstract: A damping device is provided for damping momentum in a rotary member to stop it at a desired normally stopped position without any override therefrom, the device including a friction plate moveable against the rotating member at least in the terminal stage of its travel to produce the stopping effect.

Abstract: Damping members are provided for damping momentum in a rotary member to stop it at a desired normally stopped position without any override therefrom, the members include a friction plate moveable against the rotating member at least in the terminal stage of its travel to produce the stopping effect.

Abstract: A twin-gate type turnstile in which the central barrier thereof is provided in the form of vertically staggered rows of arms extending between an opposed pair of posts, with at least terminal lengths of the fixed arms, i.e., the length portions thereof adjacent the posts extend in an arcuate course so that during the rotation of the rotors, the arms of same pass through the fixed rows of arms at about mid-length of such fixed arms thereby lessening the likelihood that a user could accidentally enter into or be caught in the space between the rotor arms and the fixed arms of the barrier if the user by mistake sought to transit the turnstile in the wrong direction or failed to exit the turnstile at the proper location.