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In firearms, a safety or safety catch is a mechanism used to help prevent the accidental discharge of a firearm, helping to ensure safer handling. Safeties generally can be divided into subtypes such as internal safeties (which typically do not receive input from the user) and external safeties (which typically allow the user to give input, for ...
A latch bolt is an extremely common latch type, typically part of a lockset. It is a spring-loaded bolt with an angled edge. [1] [2] When the door is pushed closed, the angled edge of the latch bolt engages with the lip of the strike plate; a spring allows the bolt to retract. Once the door is fully closed, the bolt automatically extends into ...
The doglock incorporates a second latch (or dog) as a safety mechanism that engages the cock in a halfway or half-cock position. The dog is independent of the trigger. The dog is only released when the lock is bought to the full-cock position. The miquelet lock is the penultimate of the flint-sparking locks.
The latch bolt is spring-loaded and has an angled surface, allowing the door to be closed and latched without first retracting the bolt. In addition, the bolt may be fitted with a guardbolt, which is arranged to prevent the unwanted retraction of the latch bolt by an intruder; in this case the latch bolt is called a deadlocking latch bolt ...
Crash bar doors in a school, with upper vertical rod latches. 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.
Some strike plates have their hole size and placement calculated so a spring-bolt extends into the hole, but an adjacent anti-retraction device remains depressed, preventing the bolt from being retracted unless the lock is turned. Talon The part of the bolt of a lock upon which the key presses as it is turned. [11] Thermal relocking device
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