Fig. 27.
Fig. 28.
Fig. 29.
Fig. 30. Candle-stick.
The hinge can be made any length desired but should be carefully proportioned; the eye can be made loose or welded. In welding a hinge-eye the lap should always be on the back. Note the drawing of the eye ready for welding in [Figure 29]. In making hinges, the making of the eye is always the first operation. A welded eye makes the strongest hinge; but it can be made with a loose eye if desired. In bending and finishing the eye, an eye-pin should be used to true the hole. An eye-pin is a piece of round steel of the desired size drawn tapering on each end so that it can be driven thru a hole. The projections that form the joint for a loose eye hinge should be cut out before the eye is made. If the stock is light, the joint in either a loose or a welded hinge can be filed or sawed after the eye is turned. In a heavy eye the projections are laid off and marked on the metal while flat. The bar is then heated and split lengthwise from one side, starting ½-inch from the end, and cutting long enough to make the eye. The eye is then formed and welded, and pieces are cut out leaving alternating projections which can be filed to fit.
Exercise No. 6.
