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Industrial Drawing and Geometry: An Introduction to Various Branches of ...
Henry John Spooner
No preview available - 2017
axes bisects block bolt breadth called centimetres centre line CHAPTER circle cone corners course cube curve cylinder diagonal diameter dimensions directrix distance divide dotted draw lines Draw plan Draw the plan DRAWING EXERCISES drawn edge of base ellipse end elevation equal in area equilateral triangle Flemish bond geometrical give given lines ground-line height hexagonal hole horizontal hyperbola inch intersection isometric drawing isometric projection Join joint lap joint length lines parallel measure millimetres minor axis oblique projection parabola pencil perpendicular plan and elevation plates position problem projection projectors proportion pyramid radius rectangle rectangular represent rhombus right angles rivet screw screw thread semicircle set-square sheet shown in Fig shows sides sketch slider solid square pyramid squared paper straight line stuffing box surface symmetry T-square tangent tetrahedron thickness thread true shape vertex vertical plane whilst
Page 73 - Thus a parabola is the locus of a point which moves so that its distance from a fixed point is equal to its distance from a fixed straight line (see fig.
Page 32 - An arc of a circle is any part of the circumference. A chord is a straight line joining the extremities of an arc. A segment is any part of a circle bounded by an arc and its chord.
Page 78 - A conic section is the locus of a point which moves so that its distance from a fixed point, called the focus, is in a constant ratio to its distance from a fixed straight line, called the directrix.
Page 165 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Page 55 - THEOREM. The sum of all the interior angles of a polygon, is equal to twice as many right angles, less four, as the figure has sides.
Page 166 - A cone is a body conceived to be formed by the revolution of a right-angled triangle about one of its sides containing the right angle.
Page 32 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Page 155 - However, a similar effect can be easily produced by a few shading lines, i which are or should be drawn in accordance with the rules followed in shading proper. To commence with a simple example, that very often in many forms appears on machine drawings, we have in Fig. 19 a' vertical hexagonal prism, with its front face in the light or illuminated. Such surfaces parallel to the vertical plane would receive flat tints, and the nearer the surface is to the eye the lighter such tints would be, and...