Box covers or small doors that are seldom used can be supplied with a small spring hinge as shown in the illustration. The hinge is made of a piece of spring wire which is formed similar to a staple with a coil or complete turn given to the wire in the center. It is attached by driving the points, one into the door and the other into the casing.

Ill: The Shape of the Hinge, and the Manner of Attaching It to a Cover or Door