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2. Crash bar - Wikipedia

   en.wikipedia.org/wiki/Crash_bar

   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.

3. Door closer - Wikipedia

   en.wikipedia.org/wiki/Door_closer

   Modern manual door closer Eclipse door spring and separate checking mechanism. A door closer is a mechanical device that regulates the speed and action of a door’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior.

4. Revolute joint - Wikipedia

   en.wikipedia.org/wiki/Revolute_joint

   The joint does not allow translation, or sliding linear motion, a constraint not shown in the diagram. Almost all assemblies of multiple moving bodies include revolute joints in their designs. Revolute joints are used in numerous applications such as door hinges, mechanisms, and other uni-axial rotation devices. [2]

5. Mortise lock - Wikipedia

   en.wikipedia.org/wiki/Mortise_lock

   Chubb's lock was patented in 1818. Again, the term refers to the lock mechanism, so a lock can be both a mortise lock and a lever tumbler lock. In the modern lever tumbler lock, the key moves a series of levers that allow the bolt to move in the door. [5] Pin tumbler lock, commonly used for mortise locks in the US

6. Door handle - Wikipedia

   en.wikipedia.org/wiki/Door_handle

   This is an accepted version of this page This is the latest accepted revision, reviewed on 20 December 2024. Device to open or close door Various examples of door handles throughout history A door handle or doorknob is a handle used to open or close a door. Door handles can be found on all types of doors including exterior doors of residential and commercial buildings, internal doors, cupboard ...

7. Clearance (civil engineering) - Wikipedia

   en.wikipedia.org/wiki/Clearance_(civil_engineering)

   In civil engineering, clearance refers to the difference between the loading gauge and the structure gauge in the case of railroad cars or trams, or the difference between the size of any vehicle and the width/height of doors, the width/height of an overpass or the diameter of a tunnel as well as the air draft under a bridge, the width of a lock or diameter of a tunnel in the case of watercraft.

8. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

9. List of cars with non-standard door designs - Wikipedia

   en.wikipedia.org/wiki/List_of_cars_with_non...

   AMC Pacer – Aircraft-style doors improve sealing and reduce wind noise, top of door wraps into the roof, hinges provide an outward arc for the top of the door for easier egress when open, rain gutters are hidden in the roof cut outs, the passenger door is four-inches (101 mm) longer than the driver's and the difference disguised by the broad ...