Hinges

• BUTT HINGE – referred to as butts because they are usually attached to the butt edge of a door. Hinges consist of two leaves with an odd number of knuckles on one leaf and an even number of knuckles on the other. The knuckles are attached with a pin. The pin and knuckles form the barrel of the hinge, which is finished with a tip.
• OLIVE-KNUCKLE HINGE – a paumelle hinge with knuckles forming an oval shape.
• INVISIBLE HINGE – a hinge so constructed that no parts are exposed when the door is closed.
• SPRING HINGE – a hinge containing one or more springs, when a door is opened, the hinge returns to its closed position automatically