This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
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