The New York Trade School's Textbook On Pattern Drafting, Suitable for All Workers in Sheet Metal
The book The New York Trade School's Textbook On Pattern Drafting, Suitable for All Workers in Sheet Metal was written by author Neubecker, William, 1864- [from Old Catalog] Here you can read free online of The New York Trade School's Textbook On Pattern Drafting, Suitable for All Workers in Sheet Metal book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The New York Trade School's Textbook On Pattern Drafting, Suitable for All Workers in Sheet Metal a good or bad book?
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Below the elevation draw a hori- zontal line as FG, crossing the center line at H. In this case the sphere is to be encircled by a band having four drops. Therefore, from the center H draw the radial lines HI and HJ at 45°. Add the projection of the band in elevation shown from E to T, and with BT as radius and H in plan as center, draw the semi-circle G^^'F, cutting the radial ELEVATION pattern for return stripX Fig. 81. lines as shown, and from these intersections extend vertical lines into t...he elevation as P and J\ which lines represent the seam lines. Within the points /' and y draw the elevation of the drop as shown, struck from the center V. Divide the quarter circle shown from i to 4, from which points horizontal lines are drawn cutting the sphere ED from i' to 4'. These horizontal hues then represent planes, the sections of which are true circles and are obtained by projecting vertical lines from points i' to 4', cutting the center line FG in plan from i" to 4". Witli H as center and the various points i" to 4" as radii, draw semi-circles as shown, which are intersected by vertical lines dropped TEXT BOOK ON PATTERN DRAFTING SI from similar numbered points in the elevation V, resulting in the points of intersections in plan i° to 4°.
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