A rotating mechanical device that controls and counts passage between public areas, especially one that only allows passage after a charge has been made
A person-counting device The mechanical device, serves as a gate, that counts how many people pass through it, since it is designed so only one person can go through it at a time Most often found at pay-per-ride parks, as a way of auditing the ticket count at the end of the day Also these can be locked, so they prevent a person from entering a ride/park, until payment has been made, or prevents people from getting close to the ride, until it is time to load it These devices come with an optional 'one-way' ratchet mechanism, so they are often found at park, and ride exits to prevent unauthorized access
A turnstile is a mechanical barrier at the entrance to a place such as a museum or a football ground. Turnstiles have metal arms that you push round as you go through them and enter the building or area. a small gate that spins around and only lets one person at a time go through an entrance revolving door
A revolving frame in a footpath to prevent the passage of horses or cattle, but admitting that of a person A representation of this is occasionally seen as a bearing