Despite the question mark, you have not yet asked a question. There have been several guns that used a hinged action- the modern Thompson/ Center single shot pistol, the older "top break" revolvers, and the antique S&W "tip up" revolvers. Please repost with a complete question, and we will try to get you an answer.
A break or hinge action pistol is a type of firearm that operates by pivoting or "breaking" open at a hinge point, typically near the chamber. This design allows the shooter to easily load and unload ammunition, often found in single-shot or double-barreled pistols. An example of a break action pistol is the "Taurus Model 66," which can be opened for reloading by breaking the barrel down. These pistols are less common than other action types but are valued for their simplicity and ease of use.
The theorem emulates the action of a hinge. As the angle of the hinge is increased the distance between the free edges increases.
fitted the hinges but door drops
installing a double action spring hing
The fulcrum on a clothes pin is located at the hinge, where the two arms meet and pivot. This hinge allows the two arms to move and create the clamping action of the clothes pin.
You don't have anything following, but an example would be the typical double barreled shotgun.
door hinges attached to door and hinge post
Hindge joint
To fix a door hinge that is not working properly, you can try tightening the screws on the hinge, lubricating the hinge with oil or WD-40, or replacing the hinge if it is damaged.
A hinge joint is not immovable. A hinge joint has one plane of motion. A good illustration of a hinge joint is the knee joint.
To replace the Ford Explorer rear window hinge, you have to buy a similar window hinge. Use a screwdriver to open the hinge and replace the hinge but fitting it in the window.
To fix a storm door hinge that is not working properly, you can try tightening the screws on the hinge, lubricating the hinge with oil or silicone spray, or replacing the hinge if it is damaged.