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addendum circle arcs axis base belt bolts border lines center line circumference Claude Fayette Bragdon cone curve cylinder diagram diameter dimensions distance draftsman edge ellipse Engineering epicycloid equal face figure gear given ground line guide pulley height helix hole horizontal lines horizontal projection hypocycloid inches inches long intersection isometric left-hand letter line drawn line of measures line parallel located machine method motion object oblique oblique projection observer's eye paper perpendicular perspective projection picture plane piece piston pitch circle plan and elevation plate position prism Problem pyramid radius rectangle represent right angles right-hand screw screw thread shade lines shaft shown in Fig shows space square station point steam straight line student surface system of lines T-square tangent thread tion triangle true length upper valve vanishing point vanishing trace vertical line vertical projection visual ray width
Page 59 - The diameter of a circle is a straight line drawn through the center and terminating in the circumference. A radius is a straight line joining the center with the circumference. It has a length equal to one half the diameter. All radii (plural of radius) are equal and all diameters are equal since a diameter equals two radii. PENTAGON.
Page 62 - A regular pyramid is one whose base is a regular polygon and whose vertex lies in the perpendicular erected at the center of the base.
Page 64 - 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 63 - A right cylinder or a cylinder of revolution is a cylinder generated by the revolution of a rectangle about one side as an axis.
Page 63 - A cone is a solid bounded by a conical surface and a plane which cuts the conical surface. The plane is called the base and the curved surface the lateral area.
Page 7 - WILLIAM RIPPER. Professor of Mechanical Engineering in the Sheffield Technical School: Member of the Institute of Mechanical Engineers. Author of "Machine Drawing and Design," "Practical Chemistry," "Steam,
Page 116 - B, let the vertex of the cone be placed at V, and one element of the cone coincide with VA I. The length of this element is taken from the elevation A, of either contour element. All of the elements of the cone are of the same length, so when the cone is rolled each point of the base as it touches the plane will be at the same distance from the vertex. From this it follows that the development of the base will be the arc of a circle of radius equal to the length of an element. To find the length...
Page 273 - II, is the circular or circumferential pitch, and is equal to the circumference of the pitch circle divided by the number of teeth. In order to run together, two gears must have the same circular pitch.
Page 202 - If a drawing is to be traced it is a good plan to use a 311 or 4H pencil, so that the lines may be easily seen through the cloth. The tracing cloth is stretched smoothly over the pencil drawing and a little powdered chalk rubbed over it with a dry cloth, to remove the slight amount of grease or oil from the surface and make it take the ink better. The dust...