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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.
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.
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]
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).
Yale & Towne Manufacturing Co, 1897. In 1868, the business was established in Stamford, Connecticut, by Henry R. Towne and Linus Yale Sr., an inventor renowned for creating the pin tumbler lock. Initially known as Yale Lock Manufacturing Co., the company later adopted the name Yale & Towne, with its base in Newport, New York. [3]
Night latches are usually rim locks [4] and are available as deadlocking (automatically locks once shut) and non-deadlocking versions.. Historically, such locks were intended for use at night-time, hence the name. [5]
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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