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apex arc struck bottom branch center line circle constructed corresponding numbers curve cylinder describe the arc developing the pattern diameter divide divisions dotted lines draw a line draw lines draw the arc edge eleva ellipse end elevation erect flange front elevation frustum half pattern half profile height hood horizontal line indicated laps line A B line through points main pipe method miter cut miter joint miter line number of spaces oblique offset oval pattern as center pattern shape pieced elbow plane points so obtained projections radii radius equal rectangular pipe right angles right cone riveting round pipe seam semi-profile sheet metal shown by corresponding shown in Fig side elevation similarly numbered small figures smoke pipe solid lines Solution square steel square stretchout take the distance tapering tern throat tion Trace a line transition piece triangles true lengths vertical line
Page 19 - A circle is a plane figure bounded by a curved line, every point of which is equally distant from a point within called the center. The curve which bounds the circle is called the circumference Any portion of the circumference is called an arc.
Page 35 - Change 3° 10' 30" to circular measure. Ans. 0.0554 radian, nearly 4. Change 15° 24' to circular measure. Ans. 0.2688 radian, nearly THE SPHERE DEF1N1T1ONS 11. In geometry, a sphere is defined as a solid bounded by a surface every point of which is equidistant from a point within, called the center. The...
Page 22 - A SPHEROID is a solid, generated by the revolution of an ellipse about one of its diameters. If the ellipse revolves about its longer or...
Page 21 - A cylinder is conccived to be generated by the revolution of a rectangle about one of its sides as an axis.
Page 371 - ... the length of each side be, to have an area similar to a ? In Fig. 11 is shown the illustration of an ordinary steel square, and the method is given of obtaining accurate diameters of...
Page 34 - A pyramid (Fig. 54) is a solid whose base is a polygon and whose sides are triangles uniting at a common point, called the vertex.
Page 21 - A cone is a solid figure described by the revolution of a right angled triangle about one of the sides containing the right angle, which side remains fixed.
Page 161 - Now with radius eqiial to l'-2' in plan, and 1' in G as center, describe the arc 2'. Then using 1 in G as center, and l°-2' in C as radius, intersect the arc 2' in G. Now with radius equal to 1-2* in the true section, and 1 in G as center, describe the arc 2, which intersect by an arc struck from 2' as center and with 2°-2