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  2. Crash bar - Wikipedia

    en.wikipedia.org/wiki/Crash_bar

    A crash bar (also known as a panic exit device, panic bar, or bump bar) [1] [2] is a type of door opening mechanism which allows users to open a door by pushing a bar. While originally conceived as a way to prevent crowd crushing in an emergency, crash bars are now used as the primary door opening mechanism in many commercial buildings.

  3. Electronic lock - Wikipedia

    en.wikipedia.org/wiki/Electronic_lock

    In the US, UL rated doors must retain their rating: in new construction doors are cored and then rated. but in retrofits, the doors must be re-rated. Electrified exit hardware, sometimes called "panic hardware" or "crash bars", are used in fire exit applications. A person wishing to exit pushes against the bar to open the door, making it the ...

  4. Carl Prinzler - Wikipedia

    en.wikipedia.org/wiki/Carl_Prinzler

    Working with his neighbor, Henry H. DuPont, an Indianapolis architect, the two men developed and were awarded a series of nine patents relating to new and improved exit door hardware. All of the patent designs focused on a single lever bar (and related hardware) that would cause a locked door to pop open when simple interior pressure was ...

  5. Exit control lock - Wikipedia

    en.wikipedia.org/wiki/Exit_control_lock

    This delay reserves time for security personnel to get to the door before the door opens. The lock will also release if there is a fire alarm or power failure, but otherwise these locks hold the exit doors shut. Exit control systems can include a "request to exit detector" such as a pushbutton that opens the exit, if exit requests are enabled.

  6. Door security - Wikipedia

    en.wikipedia.org/wiki/Door_security

    A metal doorframe with a strike plate built in: in other doors this would be a metal strikeplate in a wooden doorframe. The term door security or door security gate may refer to any of a range of measures used to strengthen doors against door breaching, ram-raiding and lock picking, and prevent crimes such as burglary and home invasions. Door ...

  7. Electric strike - Wikipedia

    en.wikipedia.org/wiki/Electric_strike

    Electric strikes for rim panic exit devices are sometimes, though not always, 'no cut' electric strikes - no cutting, in reference to a rim panic strike, means the strike is bolted to the surface of jamb without cutting into the frame or modifying it in any way (except for the drilling and tapping of mounting screw and/or anchoring pins).

  8. Security guard - Wikipedia

    en.wikipedia.org/wiki/Security_guard

    A security guard (also known as a security inspector, security officer, factory guard, or protective agent) is a person employed by a government or private party to protect the employing party's assets (property, people, equipment, money, etc.) from a variety of hazards (such as crime, waste, damages, unsafe worker behavior, etc.) by enforcing preventative measures.

  9. Frank Wills (security guard) - Wikipedia

    en.wikipedia.org/wiki/Frank_Wills_(security_guard)

    In fact, it was considered so safe that security officers in the building carried around only a can of mace. [3] In the early hours of the morning of June 17, [5] Wills noticed a piece of duct tape on one of the door locks when he was making his first round. [1] The tape was placed over the latch bolt to prevent the door from latching shut.

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