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.

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

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