This section is from the book "The New Metal Worker Pattern Book", by George Watson Kittredge. Also available from Amazon: The new metal worker pattern book.

The conditions shown in this problem are similar to those in the one just demonstrated. In this, however, the normal profile is given to the horizontal return, and the profile or the raking cornice is modified to correspond with it. To obtain the new profile proceed as follows: Divide the normal profile A1, Fig. 391, into any convenient number of parts in the usual manner, and from these points carry lines parallel to the lines of the raking cornice indefinitely. At any convenient point outside of the raking cornice, and at right angles to its lines, construct a duplicate of the normal profile, as shown by A2 which divide into like number of spaces. With the "T-square at right angles to the lines of the raking cornice, and brought success-ively against the several points in this profile, cut corresponding lines drawn through the cornice from the profile A1. Then a line traced through these points of intersection, as shown by. A3, will be the profile of the raking cornice. For the pattern of the foot of the raking cornice mitering against the return, take the stretchout of the profile A3 and lay it off on any line at right angles to the raking cornice, as shown by P O. Through the points in this stretchout line draw the usual measuring lines, as shown. With the T-square at right angles to the lines of the raking cornice, or parallel to the stretchout line, bring it successively against the points in the profile A', which is also an elevation of the miter, and cut the measuring lines drawn through the stretchout P O. Then a line traced through the points of intersection, as shown by B1 R1, will be the miter pattern of the foot of the raking cornice.

Fig. 391. - To Obtain the Profile of on Inclined Molding Necessary to Miter at Right Angles in Plan with a Given Horizontal Return, and the Patterns of Both.

For the pattern of the return proceed as follows: Construct an elevation of the return, as shown by F1 G1 K1 H1, in dimensions making it correspond to F G K H of the plan. Space the profile A of the return in the same manner as A1. At right angles to the lines in the return cornice draw any straight line, as M N, on. which lay off its stretchout, through the points in which draw measuring lines in the usual manner. Place the T-square at right angles to the lines of the return cornice, and, bringing it successively against the points in the profile A, cut the corresponding measuring lines. Through the points of intersection trace a line, as shown by G2 K2 In like manner draw a line corresponding to F1 H1 of the side elevation. Then F2 G2 K2 H2 will be the pattern of the horizontal return to miter with the raking cornice, as described.

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