. Cyclopedia of architecture, carpentry, and building : a general reference work .... t-metal worker uses in the laying out of the simplepatterns in flaring ware. In other words, one whounderstands how tolay out the pattern for a of a cone understands the principlesof developing the blanks for curved mouldings. The principles willbe described in detail in what follows. Our first problem is that of obtaining a blank for a plain flare,shown in Fig. Mi). First draw the center line A B, and construct thehalf-elevation of the mould, as C D E F. Extend D E until it inter- 336 SHEET METAL WO
. Cyclopedia of architecture, carpentry, and building : a general reference work .... t-metal worker uses in the laying out of the simplepatterns in flaring ware. In other words, one whounderstands how tolay out the pattern for a of a cone understands the principlesof developing the blanks for curved mouldings. The principles willbe described in detail in what follows. Our first problem is that of obtaining a blank for a plain flare,shown in Fig. Mi). First draw the center line A B, and construct thehalf-elevation of the mould, as C D E F. Extend D E until it inter- 336 SHEET METAL WORK 251 sects the center line A B at G. At right angles to A B from any point,as H, draw H 1 equal to C D, as shown. Using H as center, and withH 1 as radius, describe the quarter-circle 1 7, which is a section onC D, Divide 1 7 into equal spaces, as shown. Now using G as center,Avith radii equal to G E and G D, describe the arcs D 7 and E E°.From any point, as 1, draw the radial line 1 G, intersecting the innerarc at E^. Take a stretchout of the quarter-section; place it as shown.
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