Let A B C D, in Fig. 372, represent the side view and E F G H the plan of a base in which the projection of the sides, as shown at O P, is less than that of the ends, as shown at M C. B C and A D show the profile of the ends of the base. As the projection through the sides of the base is less than that of the ends, a profile must be obtained through the side O P in plan, from which to obtain the stretchout in producing the pattern of sides. To obtain the pattern for the end proceed as follows: Divide the profile B C into an equal number of parts, as shown by the small figures, and from the points obtained drop lines at right angles to A B until they intersect the miter lines J F and L G in plan. At right angles to F G draw the line B2 C2, upon which place the stretchout of the profile B C, as shown by the small figures, through which draw the usual measuring lines, which intersect with lines of corresponding numbers drawn from the miter lines at right angles to F G. A line traced through these intersections, as shown by J' L' G' F', will be the required pattern for the end of the base. To obtain the profile through the side proceed as follows: From B in elevation draw the vertical line B M, as shown, and from the divisions on the profile B C draw lines parallel to the lines of the moldings until they intersect the line B M, as shown by the small figures. From the intersections obtained on the miter line L G in plan, as before explained, draw lines parallel to H G and ex-tend them indefinitely, cutting the miter line K H, as shown. Upon K L of the plan extended set off B' M', in hight equal to B M of elevation, and transfer the spaces from B M to B' M', as shown. At right angles to B' M' and from the points on same draw lines, as shown, intersecting lines of corresponding numbers drawn from the miter line L G. A line traced through these intersections will be the desired profile through the side of the base. To obtain the pattern for the side proceed as follows: At right angles to H G draw the line B3 N2, upon which place the stretchout of the profile B' N', as shown by the small figures. It will be noticed that the spaces in the profile B' N' are unequal, and therefore each must be separately placed on the line B3 N2 Through the points in this stretchout line draw the usual measuring lines, as shown, which intersect with lines of corresponding numbers drawn at right angles to H G from the miter lines K H and L G. A line traced through these intersections, as shown by K' H' G' L', will be the desired pattern for the side.
Fig. 372. - the Patterns for a Molded Base in Which the Projection of the Sides is Different from that of the Ends.