Home instruction for sheet metal workers . Fig. 185. Assembling Side of Cap. Fig. 186. Assembling Base. can they be readily made by the home student, but are spun fromzinc and purchased from dealers in pressed zinc work. A /4-in. strip is tacked to the in-side of the half sphereA, at a, after which theother half, B, is slippedover the strip a and thejoint soldered verylightly all around. Theentire base is now joinedas in Fig. 188, the ballbeing first joined at b,and care should be takenthat the seam e f is in a<j horizontal position, af-\ ter which the cap isjoined to the neck at o
Home instruction for sheet metal workers . Fig. 185. Assembling Side of Cap. Fig. 186. Assembling Base. can they be readily made by the home student, but are spun fromzinc and purchased from dealers in pressed zinc work. A /4-in. strip is tacked to the in-side of the half sphereA, at a, after which theother half, B, is slippedover the strip a and thejoint soldered verylightly all around. Theentire base is now joinedas in Fig. 188, the ballbeing first joined at b,and care should be takenthat the seam e f is in a<j horizontal position, af-\ ter which the cap isjoined to the neck at o. Fig. 188. Completing -r-,7, ... , Base. When joining the cap to the neck care must betaken that the bend cruns parallel to the base at d, for the cap has a tendency to turnand throw the bend c out of parallel to the bend d, indicated bythe line a b, Fig. 189, which shows the appearance, in plan view,when the cap is not set parallel to the Fig. 189. Fig. 187. Joining the Sphere. Fig, 189. Cap Not Parallel With Base. 138 Home Instruction for Sheet Metal Workers The base having been completed, the student will now lay outthe shop detail of the upper part of the finial. Referringto Fig. 178, in which the front elevation of the upper part of thefinial is shown, note that a is the center of the sphere and thatb, c, d indicate the points of intersection in mitering the squareshaft i upon the ball, as will be explained when laying out thefull size detail. The center c is for drawing the curve on thebase of the shaft, while k, o and p are the centers for drawingthe profiles of the stem and rosettes. Points / and h are usedin drawing the scroll. With the scale rule take the heights onthe center line from the center a to i to m to n, and the variousother ornaments, and place these measurements full size on thecenter line A B, as in Fig. 190 (see Folder 3). The point C onthe line A B is established at pleasure, it being the center
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1922
