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2. 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 ...

3. 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.

4. Pin tumbler lock - Wikipedia

   en.wikipedia.org/wiki/Pin_tumbler_lock

   The first known example of a tumbler lock was found in the ruins of the Palace of Khorsabad built by king Sargon II (721–705 BC.) in Iraq. [1] Basic principles of the pin tumbler lock may date as far back as 2000 BC in Egypt; the lock consisted of a wooden post affixed to the door and a horizontal bolt that slid into the post.

5. Mortise and tenon - Wikipedia

   en.wikipedia.org/wiki/Mortise_and_tenon

   A mortise is a hole cut into a timber to receive a tenon. There are several kinds of mortise: [16] Open mortise: a mortise that has only three sides. (See bridle joint). Stub mortise: a shallow mortise, the depth of which depends on the size of the timber; also a mortise that does not go through the workpiece (as opposed to a "through mortise").

6. Green Bay Harbor Entrance Light - Wikipedia

   en.wikipedia.org/.../Green_Bay_Harbor_Entrance_Light

   Location: approaches to Green Bay, Wisconsin harbor: Coordinates: 1]: Tower; Constructed: 1935 [2]: Foundation: Concrete pier: Construction: Steel plate: Automated: 1979 [2]: Shape: white conical tower on cylindrical base: Light; Focal height: 72 feet (22 m): Lens: fourth order Fresnel lens: Range: 12 nautical miles (22 km; 14 mi): Characteristic: occ. red 4s: The Green Bay Harbor Entrance ...

7. Door - Wikipedia

   en.wikipedia.org/wiki/Door

   A pet door (also known as a cat flap or dog door) is an opening in a door to allow pets to enter and exit without the main door's being opened. It may be simply covered by a rubber flap, or it may be an actual door hinged on the top that the pet can push through.