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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.
Circa 1908, Prinzler, Dupont and the Vonnegut Hardware Company entered into an arrangement providing for the manufacture, marketing and distribution of the patent protected hardware. Under the trade name Von Duprin (a blend of the three principals names, VONnegut, DUpont, PRINzler) the Von Duprin Safe Exit Device, as it was called, was ...
Door furniture (British and Australian English) or door hardware (North American English) ... Crash bar or Panic bar; [3] Flush pull handle for sliding glass door.
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 easiest of mechanically-free exit methods. Electrified exit hardware can be either fail unlocked or fail locked.
The basic assumption is that the hardware and the software should perform correctly and a failure of an assertion results in a panic, i.e. a voluntary halt to all system activity. [5] The kernel panic was introduced in an early version of Unix and demonstrated a major difference between the design philosophies of Unix and its predecessor Multics.
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).
Panic has announced two accessories for the device. A purple cover was released simultaneously with the device's 2022 launch, and later offered in an alternate aqua color. A yellow "stereo dock" that charges the Playdate and functions as a speaker and a penholder was announced in 2021, [ 14 ] but in 2024 the device was shelved.
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.