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2. Crash bar - Wikipedia

   en.wikipedia.org/wiki/Crash_bar

   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.

3. Carl Prinzler - Wikipedia

   en.wikipedia.org/wiki/Carl_Prinzler

   Working with his neighbor, Henry H. DuPont, an Indianapolis architect, the two men developed and were awarded a series of nine patents relating to new and improved exit door hardware. All of the patent designs focused on a single lever bar (and related hardware) that would cause a locked door to pop open when simple interior pressure was ...

4. Vonnegut Hardware Company - Wikipedia

   en.wikipedia.org/wiki/Vonnegut_Hardware_Company

   In 1895, he was entitled manager of the art-hardware and building material department. By 1908, Prinzer, working in conjunction with his Indianapolis neighbor, architect Harry H Dupont, would develop and receive US patent protection for what would later come to be known in the industry as panic bar door hardware.

5. Door furniture - Wikipedia

   en.wikipedia.org/wiki/Door_furniture

   A typical "handle set" is composed of the exterior handle, escutcheon, an independent deadbolt, and the interior package (knob or lever). On some doors the latch is incorporated into a hinged handle that releases when pulled on. See also: Doorknob – A knob or lever on an axle that is rotated to release the bolt; Crash bar or Panic bar; [3]

6. Electronic lock - Wikipedia

   en.wikipedia.org/wiki/Electronic_lock

   In the US, UL rated doors must retain their rating: in new construction doors are cored and then rated. but in retrofits, the doors must be re-rated. 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 ...

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