. Cyclopedia of architecture, carpentry, and building : a general reference work .... sindicated bj J, a distance of -^^inch. Parallel to G H draw c d ^-n- r? giving slight play room between G H, intersecting e d and e 0 2itd and e respectively. From e at rightangles to d e, draw a line as shown, intersecting h G at /, which isthe pivot on which the cut-off c d e will turn either right or angles of the pipes on opposite sides are constructed in similarmanner; ABCDEFGHIJKLM will be the elevation, N,the section on A M and O P E, S the section on I J. B T U Lshows how far the upper tube
. Cyclopedia of architecture, carpentry, and building : a general reference work .... sindicated bj J, a distance of -^^inch. Parallel to G H draw c d ^-n- r? giving slight play room between G H, intersecting e d and e 0 2itd and e respectively. From e at rightangles to d e, draw a line as shown, intersecting h G at /, which isthe pivot on which the cut-off c d e will turn either right or angles of the pipes on opposite sides are constructed in similarmanner; ABCDEFGHIJKLM will be the elevation, N,the section on A M and O P E, S the section on I J. B T U Lshows how far the upper tube projects into the body under whichthe scoop e d c turns right and left to throw the rain water intoeither elbow as desired. The pattern for the upper piece A T U Mis a straight piece of metal whose circumference is equal to N. For the pattern for (A), divide the half section O P R intoequal spaces as shown, from which erect lines intersecting the miterline II K as shown, and from which, parallel to K L and H G, drawlines intersecting the Joint lines G Ji L as shown. As none of the. 149 78 SHEET METAL WORK lines Just drawn intersect the corner //, it will be necessary to ob-tain this point on the half section O P R from which the stretch-out of the pattern is taken. Therefore from //, parallel to LKdraw li Ji intersecting II K at //, from which, parallel to K J, dropa line intersecting the profile O P E. S at h\ At right angles toL K draw stretchout of O P R S as shown by similar numbers onT U, through which at right angles to T^ U draw lines which areintersected by lines drawn at right angles to L K from similar in-
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