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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 price had risen to $3,000 before eBay closed the auction. [8] [9] In May 2006, the remains of U.S. Fort Montgomery, a stone fortification in upstate New York built in 1844, were put up for auction on eBay. The first auction ended on June 5, 2006, with a winning bid of US$5,000,310.
Schlage (/ ʃ l eɪ ɡ / SHLAYG) [1] [2] is an American lock manufacturer founded in 1920 by Walter Schlage. Schlage was headquartered in San Francisco from its inception until it relocated to Colorado Springs, Colorado, in 1997. Schlage also produces high-security key and cylinder lines Primus, Everest, and Everest Primus XP.
His first patent was in 1909, inventing a door lock that turned lights on and off. [1] At the time, Schlage was a citizen of Germany residing in Berkeley, California. [2] In 1919, Schlage patented a door knob which, when pushed up, locked the door. [3] [4] This was succeeded by a door knob incorporating a push-button lock, patented in 1924. [5]
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).
Slaymaker Lock Company was a manufacturer of locks founded in 1888, which for a time made steam-powered automobiles. The company invented many unique inexpensive locks and were famous for their warded padlocks.
A drawbar is a defensive implement used to secure a door or gate in a medieval or Early Modern building such as a castle, [1] [2] but also churches and townhouses.. When drawn across the full length of the door, it prevents the door or gate from being opened.
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