Cyclopedia of Drawing: Mechanical, architectural, pen and ink rendering, lettering

Front Cover
A. S. C., 1906 - Drawing
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Page 59 - 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.
Page 64 - A cone is a solid bounded by a conical surface and a plane which cuts the conical surface.
Page 70 - Draw the horizontal straight line AC about 3| inches long and assume the point P about 1 inches above A C. Through the point P draw an oblique line FE forming any convenient angle with A C.
Page 100 - The slanting edges of the pyramid, AC, AD, etc., must be all of the same length, since A is directly above the center of the base. What this length is, however, does not appear in either projection, as these edges are not parallel to either V or H. Suppose that the pyramid be turned around into the dotted position C, D, E, F, where the horizontal projections of two of the slanting edges, AC, and AE, are parallel to the ground line. These two edges, having their horizontal projections parallel to...
Page 41 - It is a good plan to draw lines fa inch apart on a separate sheet of paper and pencil the letters in order to know just how much space each word will require. The insertion of the words " Fig. 1"
Page 67 - The two fixed points are the foci and the line passing through them is the transverse axis. Rectangular Hyperbola. The form of hyperbola most used in Mechanical Engineering is called the rectangular hyperbola because it is drawn with reference to rectangular co-ordinates. This curve is constructed as follows : In Fig. 5, OX and OY are the two co-ordinates drawn at right angles to each other. These lines are also called axes or asymptotes.
Page 35 - After the paper is fastened in position, find the center of the sheet by placing the T-square so that its upper edge coincides with the diagonal corners A and G and then with the corners F and B, drawing short pencil lines intersecting at C. Now place the T-square so that its upper edge coincides with the point C and draw the dot and dash line D E.
Page 118 - 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 18 - T-- square place the triangle so that the other 45-degree angle is in the position occupied by the first. If the two 45-degree angles coincide they are accurate. Triangles are very convenient in drawing lines at right angles to the T-square. The method of doing this is shown in Fig. 10. Triangles are also used in drawing lines at an angle with the horizontal, by placing them on the board as shown in Fig. 11. Suppose the line EF (Fig. 12) is drawn at any anjle, and we wish to draw a line through the...
Page 106 - elevation is found by projecting up to the same heights as shown in the proceeding elevation. This principle may be applied to any solid, whether bounded by plane surfaces or curved. This principle as far as it relates to heights, is the same that was used for profile views. An end view is sometimes necessary before the plan or elevation of an object can be drawn. Suppose ihat in Fig. 18 we wish to draw the plan and elevation of a triangular prism 3" long, the end of which is an equilateral triangle...

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