Definitions for "Turnstile"
A revolving frame in a footpath, preventing the passage of horses or cattle, but admitting that of persons; a turnpike. See Turnpike, n., 1.
a gate consisting of a post that acts as a pivot for rotating arms; set in a passageway for controlling the persons entering
a form of gate which allows movement of people ''into'' a building or venue, but not ''out''
In mathematical logic and computer science the symbol \vdash has taken the name turnstile because of its resemblance to a typical turnstile if viewed from above. The symbol was first used by Gottlob Frege in his Begriffsschrift.The article on the Begriffsschrift describes its notation in detail.
Français : Portillon d'accès Deutsch : Drehkreuz
Keywords:  swipe, relay, reader, exterior, valid
This allows door 1 to be used as an exterior reader and door 2 as an internal reader. Door 1 lock relay activates on a valid swipe at door one's reader Door 2 lock relay activates on a valid swipe at door two's reader Close Glossary Window
A similar arrangement for registering the number of persons passing through a gateway, doorway, or the like.
A rotating barrier system that allows only one person to pass at a time. Used in conjunction with Electronic Access Control.
a horizontally polarized antenna