Home instruction for sheet metal workers . 4-in. scale rule, measure off theheights on the center line and place them as shown by full sizemeasurements on the center line A B in Fig. 544 (See Folder 13).In similar manner obtain the various projections from thescale drawing in Fig. 543, measuring from the center line, andplace these distances on each side of the center line A B, , the full size of the projections being shown on the left various radii for drawing the molds are also scaled from thelesson drawing in Fig. 543 and are shown by full-size measure-ments in the detail in
Home instruction for sheet metal workers . 4-in. scale rule, measure off theheights on the center line and place them as shown by full sizemeasurements on the center line A B in Fig. 544 (See Folder 13).In similar manner obtain the various projections from thescale drawing in Fig. 543, measuring from the center line, andplace these distances on each side of the center line A B, , the full size of the projections being shown on the left various radii for drawing the molds are also scaled from thelesson drawing in Fig. 543 and are shown by full-size measure-ments in the detail in Fig. 544, a and b representing the center 374. Plan Fig. 543. Half Plan and Elevation ofRound Finial—Scale 1 ]/2 Inches toFt. Construction and Patterns for a Round Finial 375 points for the quarter round and cove. The center for the beadbeing on the horizontal dotted line marked *^> R, R meaningradius. After e and / of the upper neck of the finial have beenobtained, knowing that the ball is to be 5 in. in diameter, thenwith the compasses set 2l/2 in., using either e or / as centers, drawan arc intersecting the cented line at d, which is the center fordescribing the ball. This completes the elevation of the roundfinial. The quarter round struck from a as center, will be raised inone piece; the cove struck from b will be made in three parts,and the curve is therefore divided into three equal spaces, N O,Q P and P R on the right hand side of the drawing; the horizon-tal lines through O and P represent the seam lines. The bead ismade in two halves. The full ball will be made in six sections;therefore the hemisphere is divided in
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1922
