In Fig. 286, let A B D C represent any panel, around which a molding is to be carried of the profile at E and E1. The miters required in this case are of the nature commonly called "face" miters, to distinguish them from other square miters, which can only be shown in a plan view. A correct elevation of the panel A B D C, with the lines of the molding carried around the same, determines the miter lines A F and G C, which, in connection with the profiles at E and E' are all that is necessary to the development of the pattern. The two profiles are here drawn, thus constituting an entire section of the panel, because it is usual, for constructive reasons, to cut the two moldings with the intervening panel in one piece where the width of a Panel.
The metal will permit it. Divide the two profiles in the usual manner into the same number of parts, from which points draw lines parallel to the lines of the molding, cutting the miter lines, as shown. For the pattern of the side corresponding to A B lay off a stretchout at right angles to it, as shown by H K, through which draw measuring lines in the usual manner. Place the T-square at right angles to A B, or, what is the same, parallel to the stretchout line H K, and, bringing it successively against the several points in the miter line A F, cut measuring lines of corresponding number. Then a line traced through these points, as shown by L M, will be the pattern sought. The other pattern is developed in like manner. It is usual to draw the stretchout lines, K H and K1 H1 across the lines of the moldings which they represent, beginning the stretchouts at the inner lines of the molding, thus: Point 10 of profile E would be located at V, while point 10 of profile E1 would be at W. While this is apt to produce some confusion of lines in actual practice, it gives the entire profile in one continuous stretchout for the purpose alluded to above - that of cutting the entire width of the panel in one piece. Should it be desired to make one of the moldings separate from the rest, an additional point for the purpose of a lap is assumed at one of the moldings, as 11 of profile E1. The pattern for the end piece, A C, may be derived without drawing an additional profile, as its profile and stretchout are necessarily the same as that of the other two arms; therefore reproduce H K on a line at right angles to A C, as shown by N O, through the points in which draw measuring lines in the usual manner, producing them sufficiently far in each direction to intercept lines dropped from the points in the two miter lines. Place the T-square at right angles to A C, and, bringing it successively against points already in A F and C G, cut measuring lines of corresponding numbers. Then lines traced through the intersections thus formed, as shown by P R and S T, will be the shape of the pattern of the end piece.
Fig. 286. - A Face Miter at Right Angles, us in the Molding .Around
It may be noticed in the last operation that dropping the points from either of the miter lines, as A F, into the measuring lines is, in fact, only continuing in the same direction the lines previously drawn from the profile E to the line A F; and that in reality the shape of the cut at P R is developed without the assistance of the miter line, thus giving another instance of the fact that any square miter can be cut by the short method when the relation of the parts is understood.