How does a half height turnstile work?

 

·       A person can open the passage way with kind of access control systems, card reader systems, remote control systems, biometric systems, ticket accepting devices etc.

·       It is a post with a number of short poles sticking out from it that have to be pushed round as each person walks through the entrance.

·       After a person has passed, the turnstile arms locking again immediately.

·       They can allow only one-way passage or bidirectional use.

·       In case of fire or any similar emergency situation, free exit option is available.

·       If a waist height turnstile is lock while power off, it has been called fail secure waist height turnstile. If a waist height turnstile is free while power off, it has been called fail safe turnstile.

  

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     How is a tripod turnstile mechanism?

·       Tripod Turnstiles often use ratchet mechanisms to allow the rotation of the stile in one direction allowing ingress but preventing rotation in the other direction.

·       A lock up arm (pawl) is used to locking at the tripod turnstile mechanism.

·       Solenoid pushes or pull the pawls.

·       A drive spring provides the turnstile arm to return its correct position when passage occurs. Drive spring mechanism has a spring inside its housing used to store mechanical energy. If this spring is compressed more than desired, force applied to turnstile arm rotating force will increase.

·       Shock absorber provides the smooth operation of the turnstile. Kinetic energy of the arm is absorbed by the shock absorber while arm comes to its original place.

·       Proximity switches are used to received passage information or position of arms.

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