Fig. 23.
Fig. 24.
The plates are now filed to straighten the square holes, and the holes on the corners for screws are drilled. [Figure 24] represents the catch, which can be made as shown, and the knob which is worked out on the end of a rod, as shown in [Figure 25]. It is hammered on the outer edge of the anvil. After each blow it is turned until finished. Then it is cut off and the tenon is filed. The guard shown in [Figure 26] is cut from a flat piece as represented. The bar is made from ½ by ³⁄₁₆-in. stock, drilled, and a slot is sawed for the spring. The spring is about ⅛ by ³⁄₃₂-in. and can be made from spring steel.
Fig. 25.
Fig. 26.
[Figure 27] represents a hinge that can be made from ⅛-in. soft steel. After the design is sketched with a slate pencil on the metal, the open parts are drilled and cut out. The outside is next cut with a chisel and the edges are filed smooth. The eye or joint of the hinge is formed without welding, by hammering it around an eye pin of the desired size. The prongs or projections to form the knuckle are filed so that they fit into one another. The interlacing is done with a square end punch in the same manner as explained for the latch. A great variety of designs of this kind can be made to advantage in iron. A drawing of a simple strap hinge is shown in [Figure 28]. The part of the strap at A on the drawing is made greater in length than width for appearance. This gives the strap apparent strength and emphasizes its length.
