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2. Glossary of locksmithing terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_locksmithing_terms

   When the door is closed, the bolt extends into the hole in the strike plate and holds the door closed. The strike plate protects the jamb against friction from the bolt and increases security in the case of a jamb made of a softer material (such as wood) than the strike plate. Some strike plates have their hole size and placement calculated so ...

3. Latch - Wikipedia

   en.wikipedia.org/wiki/Latch

   When the door is closed, the latch bolt and guardbolt are retracted together, and the door closes normally, with the latch bolt entering the strike plate. The strike plate, however, holds the guardbolt in its depressed position: a mechanism within the lockset holds the latch bolt in the projected position.

4. Mortise lock - Wikipedia

   en.wikipedia.org/wiki/Mortise_lock

   The parts included in the typical US mortise lock installation are the lock body (the part installed inside the mortise cut-out in the door); the lock trim (which may be selected from any number of designs of doorknobs, levers, handle sets and pulls); a strike plate (or box keep), which lines and reinforces the cavity in the door jamb or frame ...

5. Electric strike - Wikipedia

   en.wikipedia.org/wiki/Electric_strike

   An electric strike is an access control device used for door frames. It replaces the fixed strike faceplate often used with a latch (also known as a keeper). Like a fixed strike plate, it normally presents a ramped or beveled surface to the locking latch allowing the door to close and latch just like a fixed strike would.

6. Electromagnetic lock - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_lock

   Filler plates are also used to provide a large, flat mounting area on the door frame when the electromagnet is larger than the available mounting space on the door frame due to the frame's geometry. The magnetic lock should always be installed on the secure side of the door. Most installations are surface mounted.

7. Door phone - Wikipedia

   en.wikipedia.org/wiki/Door_phone

   Video door phone indoor terminal.. Going a little further in time, we find video door phones featuring a video installation apart from the classical audio. In these cases, the intercom plate has the same structure as the previous version but features a video monitor connected to a surveillance camera that allows inspecting the person who pressed the button and part of the surrounding area.