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allowance Aluminium angle base line bending body bottom branch pipe brazed calculated centre line CHAPTER circle circular compasses construction lines copper corner course cut off equal cylindrical described diameter distance divided division point dotted lines draw drawn square edge eleva ellipse equal in length explained fixed flange flat frustum galvanised girth line give groove gutter hammer hole hood inside intersect joined joint line lengths of lines lines are drawn lines drawn lines square main pipe marked measured method moulding neutral line oblique cone obtained oval parallel pattern perpendicular piece plate metal quarter-circle radial lines radii radius riveted Round Pipe seam seen segment semicircle shape sheet iron sheet metal shown in Fig slant height solder spelter spout straight strip surface tapered thickness throat tion triangle vessel whilst width wiring zinc
Page 60 - The square of the hypothenuse is equal to the sum of the squares of the other two sides ; as, 5033 402+302.
Page 99 - A simple form of kerb is shown in Fig. 78, which will give some idea of the shape into which the sheet metal is to be bent. The kerb may be made out of hammered or polished sheet copper or brass, or even be made out of plain sheet iron, and afterwards blacked or japanned. The setting out of the patterns for a very simple shape is shown in Fig. 79. The form of the section, it will be seen, is drawn on the plan of the fender, this being afterwards divided up into four parts, 0 to 1, 1 to 2, 2 to 3,...
Page 102 - The radius of this sector of a circle will, of course, be equal to the slant height of the cone, and the length of the arc ADB will be of the same length as the circumference of the base of cone.
Page 450 - Contraction is the property which a metal has of increasing its length or volume when heated, or decreasing the same when cooled. Specific Heat, or the relative quantities of heat absorbed by metals all compared to the heat absorbed by an equal weight of water when raised through the same temperature. In the following table the metals are arranged in the order of their respective qualities, the first in the list being the best: — Metal Specific Gravity.
Page 121 - ' angles in the same segment of a circle are equal," and conversely if pairs of lines be drawn all containing the same angle, as in Fig. 103, then the points of intersection of the lines will lie on the arc of a circle. The way this can be used in practice is explained by Fig. 100. If two strips of timber or two lengths of hoopiron be screwed or riveted together to form a bevel, and one arm...