Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 142
110 SHEET-METAL WORK 51 sides of a cone is a true ellipse. Bearing tliis in mind it isevident that if the frastnm of the cone H I O N, Fig. 54, werea solid and cut oblicinely*by the plane J K and the several partsplaced side by side, both would i^resent true ellipses of exactly thesame size, and if… … Fig. 52. of the two pieces from J to K would exactly coincide. Takingadvantage of this fact, it is necessary only to ascertain the angle ofthe line J K, to produce the required angle, between the two piecesof the elbow, both of which have an equal flare. The angle of themiter line, or the line…
Architecture · Building · Carpentry
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