When screws once work loose in hinges of doors they will never again hold firmly in the same hole. This trouble can be avoided if the screws are securely locked when they are first put on the door. The sketch shows a very successful way to lock the screws. The hole in the hinge for the screw is filed to produce a notch, as shown at A, deep enough to receive a small wire nail or brad, which is driven through the slot in the screw head at one side, as shown at B.

The Screw is Permanently Locked with a Small Nail Driven into the Slot Prepared for It

Ill: The Screw is Permanently Locked with a Small Nail Driven into the Slot Prepared for It