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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.
The key contains a power supply device, usually a rechargeable battery or a replaceable battery in the key, used to drive the system to work; it also includes an electronic storage and control device for storing the identification code of the lock. The software is used to set and modify the data of each key and lock. [2]
Carl Jacob Prinzler (June 6, 1870 – May 30, 1949) was an American engineer who invented the "panic bar" device for doors that allowed them to be opened from the inside despite being locked on the outside.
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).
The jury at Daniel Penny's lightning-rod Manhattan manslaughter trial broke without reaching a verdict Thursday after asking once again to revisit shocking footage of the fatal subway encounter ...
A powerful earthquake that shook the southern Philippines killed at least one villager and injured several others as thousands scrambled out of their homes in panic and jammed roads to higher ...
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Sometimes, you find yourself in a crowded space and simply need others to get away from you. That happened when the 6-4, 366-lb. T'Vondre Sweat ripped the ball away from Joe Burrow and immediately ...