Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . o o o 0/o / o oo o Ra, Y of the bottom plan as radius, set this distance from^ to C on B, and with C as a center, swing the arc A, B, C,D, E, F, G, and with yi of the top plan oi H, 6 to 11, draw this54 circle to the left of the line i to C, space this into equalspaces same as top plan and number i to 6; drop hnes parallelto I, C down to arc which gives you points on arc of A, B,C, D, E, F, from these points extend lines paralle
Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . o o o 0/o / o oo o Ra, Y of the bottom plan as radius, set this distance from^ to C on B, and with C as a center, swing the arc A, B, C,D, E, F, G, and with yi of the top plan oi H, 6 to 11, draw this54 circle to the left of the line i to C, space this into equalspaces same as top plan and number i to 6; drop hnes parallelto I, C down to arc which gives you points on arc of A, B,C, D, E, F, from these points extend lines parallel to A toSec. B, then draw lines from top plan of H down to wherethey intersect lines from S^ as you will see by the drawingthe lines 5 and 6 of // do not run into Sec. B, but drop on toSec. C, likewise lines from E, F, of B^ are not extended. FIG. 8.—FINISHED COWL IN FOUR PIECES, STEEL. FIG. 9.—FINISHED COWL IN FOUR PIECES, COPPER. from the last point spaced, the distance to i?ii should be theother half of the single space, this makes a seven-pieced elbow,but virtuallj comprised of six full sections, as Sec. A andSec. G are one-half sections, from these points secured onthe arc draw lines to the common radial center X, these linesconstitute the miter lines of the seven pieces of the elbowviz., A, B, C, D, E, F, then draw bottom line of Sec. A par-allel to Ri, R3; directly below this draw a one-half plan ofthe elbow and divide into equal spaces; from these pointsdraw lines up to miter line of Sec. A and B, extend theselines through the several sections B, C, D, E, F, G, makingSec. G the same length as Sec. A, the points /, /, K, L, show-ing a half section of a full section. Now draw the side lines(i and 11) of the cylinder H. with line 6 being the center ofthe cylinder, also draw directly above the half plan of H andspa
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Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
