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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.
A panic button in an Ola cab in Kolkata, for passenger use. A panic alarm is an electronic device that can easily be activated to request help during an emergency where danger to persons or property exists. It is designed to contact assistance quicker, easier, and simpler (in some cases, less conspicuously) than a conventional phone call.
This allows a guard to get to the door before the door opens. It will also release if there is a fire alarm or power failure, but otherwise these locks hold the exit doors shut. These units are common in Alzheimer units. Exit control systems can include a "request to exit detector" such as a pushbutton that opens the exit if exit requests are ...
Lock designs became significantly more complicated in the 18th century, and locksmiths often specialized in repairing or designing locks. Although fitting of keys to replace lost keys to automobiles and homes, and the changing of keys for homes and businesses to maintain security is still an important part of locksmithing, according to a 1976 ...
Emergency exit in Universitetet metro station in Stockholm. An emergency exit in a building or other structure is a special exit used during emergencies such as fires.The combined use of regular and emergency exits allows for faster evacuation, and emergency exits provide alternative means of evacuation if regular exits are inaccessible.
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).
Locks are usually re keyed to build master-key systems, make a set of locks share a common key, or to eliminate compromised keys. [2] [3] [4] Sometimes worn pins are replaced with new pins if the old pins become too short to reach the shear-line. [5] The shear-line is the thin line shared by the lock plug and its cylindrical housing. If a pin ...
A Knox vault in an academic building A Knox KeySecure, attached inside the cab of a fire engine, holds a high-security key to open KnoxBox key boxes in the area.. A Knox Box is a small, wall-mounted safe that holds building keys for fire departments, emergency medical services, and sometimes police to retrieve in emergency situations.