HINGES.
[Plate 13], Various outlines of the same hinge.
[Plate 14], Hinges of same outline with interior variations.
[Plates 15], [16], [17], Butt and Strap Hinges.
In a hinge, the joint is the important feature. The size of the hinge, the strength required, and the decoration must also receive attention. After these have been determined, a drawing should be made giving a development of the joint. Whatever the size of the hinge, the following principle in regard to the joint must be kept in mind. There must be alternating projections left on the inner ends of each leaf of the hinge to fit into one another so that the pin may pass through them and allow the hinge to swing. The method of making these projections is determined by the size of the hinge.
In hinges of any considerable size, the projections are left attached to the hinge proper; in allowing for them there will be an even number on one leaf and an odd number on the other. To obtain the strength desired, the width of the projections on one leaf should equal the width of the projections on the other leaf. This applies to any number of projections. Their length should be determined by the diameter of the joint, three times the diameter is the approximate length.
In making small hinges the projections may be bent into position by the use of the round nose plyers. In larger work the projection is fastened in the vise and beginning at the end is bent around the pin a little at a time using the raw-hide mallet to work it into shape.
For small joints or hinges, such as would be used on a match box, stamp box, bon-bon box, or ink pot, the joint should be made of small tubing as described on page [110]. This tubing is sawed into the required lengths and soldered to the leaves to be hinged. The parts to receive the joint are sometimes filed out.
Plate 13.
Plate 14.
Plate 15.
Plate 16.
Plate 17.