shows the same box with the lid open, and it will be observed that the chamfered edges come together and form a stop which prevents the lid falling backwards and breaking the box. This method of letting-in the knuckle flush is a useful one for box work because the ordinary stock brass butt hinge can be used. Attention may, however, be called to the "stopped butt-hinge," which is specially made to answer the above purpose; in its action a similar mechanical principle as the one applied to the box is used.
Fig. 229.—Strap Hinge.
Fig. 230.—Reversible or Double-folding Screen Hinge.
Fig. 231.—Pivot Hinge for Screens.
Fig. 232.—Non-reversible Screen Hinge.