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  2. Dihedral synchro-helix actuation doors - Wikipedia

    en.wikipedia.org/wiki/Dihedral_Synchro-Helix...

    The dihedral synchro-helix actuation door system is a type of door with a hinge mechanism which allows the doors to rotate 90° by sweeping outwards and upwards at the hinge. [1] It was designed and developed by Christian von Koenigsegg on behalf of high-performance sports cars manufacturer, Koenigsegg Automotive AB . [ 2 ]

  3. List of medieval armour components - Wikipedia

    en.wikipedia.org/wiki/List_of_medieval_armour...

    Extra plate that covers the front of the shoulder and the armpit, worn over top of a pauldron. Rerebrace or brassart or upper cannon (of vambrace) Plate that covers the section of upper arm from elbow to area covered by shoulder armour. Besagew: Circular plate that covers the armpit, typically worn with spaulders. See also rondel.

  4. Shin guard - Wikipedia

    en.wikipedia.org/wiki/Shin_guard

    The Book of Samuel is commonly accepted to be written by Prophets Samuel, Nathan, and Gad between 960 and 700 B.C. [5] Later, more concrete, examples of the shin guard concept resurfaced in the Middle Ages. All studies and evidence show greaves were improved to cover the entire lower leg, front and back, from the feet to the knees, and were ...

  5. Hinge - Wikipedia

    en.wikipedia.org/wiki/Hinge

    An ornate brass door hinge A barrel hinge. A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation, with all other translations or rotations prevented; thus a hinge has one degree of freedom.

  6. Geared continuous hinge - Wikipedia

    en.wikipedia.org/wiki/Geared_continuous_hinge

    A geared continuous hinge is a type of continuous hinge used mostly on doors in high-traffic entrances and features gear teeth that mesh together under a cap that runs the length of the hinge. The hinges use a number of fasteners to attach the door to the frame from top to bottom to distribute a door’s weight more evenly along the frame to ...

  7. Four-bar linkage - Wikipedia

    en.wikipedia.org/wiki/Four-bar_linkage

    It consists of four bodies, called bars or links, connected in a loop by four joints. Generally, the joints are configured so the links move in parallel planes, and the assembly is called a planar four-bar linkage. Spherical and spatial four-bar linkages also exist and are used in practice. [1] A pumpjack's main mechanism is a four-bar linkage

  8. Linkage (mechanical) - Wikipedia

    en.wikipedia.org/wiki/Linkage_(mechanical)

    Five bar linkages often have meshing gears for two of the links, creating a one DOF linkage. They can provide greater power transmission with more design flexibility than four-bar linkages. Jansen's linkage is an eight-bar leg mechanism that was invented by kinetic sculptor Theo Jansen. Klann linkage is a six-bar linkage that forms a leg mechanism;

  9. Breechblock - Wikipedia

    en.wikipedia.org/wiki/Breechblock

    A typical break-action, double-barreled shotgun. A way of closing the breech or chamber is an essential part of any breech-loading weapon or firearm.Perhaps the simplest way of achieving this is a break-action, in which the barrel, forestock and breech pivot on a hinge that joins the front assembly to the rear of the firearm, incorporating the rear of the breech, the butt and usually, the ...