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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.
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.
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Under this approach, alarm monitoring companies must verify the legitimacy of alarms (except holdup, duress, and panic alarms) before calling the police. Verified response typically involves visual on-scene verification of a break-in, or remote audio or video verification.
A new panic alarm system that was triggered during Wednesday’s deadly shooting at a Georgia high school likely saved countless lives, authorities and advocates for the technology said.
Walmart in California’s Central Valley shuts down after 3-alarm fire prompts store’s evacuation. Stephen Hobbs. June 22, 2024 at 6:42 PM.
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