panic bolt

panic bar

noun
a bar that spans an emergency exit door on its interior and opens the latch when pressure is applied.
Also called panic bolt.


Origin:
1925–30

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
panic bolt
 
n
a bolt on the inside esp of double doors that is released by pressure on a waist-high bar: used for emergency exits in theatres, shops, etc

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