The names given to the various lines of a tooth on a gear-wheel are as follows: In Figure 233, A is the face and B the flank of a tooth, while C is the point, and D the root of the...
Fig. 202. Fig. 203. The screw thread for small bolts is represented by thick and thin lines, such as was shown in Figure 152, but in larger sizes; the angles of the thread also are...
A Drawing Board should be of soft pine and free from knots, so that it will easily receive the pins or tacks used to fasten down the paper. Its surface should be flat and level, or...
A Drawing Board should be of soft pine and free from knots, so that it will easily receive the pins or tacks used to fasten down the paper. Its surface should be flat and level, or...
In the figures from 308 to 328 inclusive are given three examples in engine work, all these drawings being from The American Machinist. Figures 308 to 314 represent drawings of an...
Although in workshop drawings, line-shading is rarely employed, yet where a design rather than the particular details of construction is to be shown, line-shading is a valuable acc...
Fig. 149. Fig. 150. Fig. 151. Let it be required to draw a machine screw, and it is not necessary, and therefore not usual in small screws to draw the full outline of the thread, b...
When the interior of a piece is to be shown as a piece cut in half, or when a piece is broken away, as is done to make more of the parts show, or show more clearly, the surface so...
Bolt. Bolt Head and Nut. Diameter. Standard Number of threads per inch Long diameter, I, or diameter across corners Short diameter of hexagon and square, or width across J Depth of...
Figure 217 represents a simple example for practice, which the student may draw the size of the engraving, or he may draw it twice the size. It is a locomotive spring, composed of...
Fig. 257. Let it be required to find how much motion an eccentric will give to its rod, the distance from the centre of its bore to the centre of the circumference, which is called...
Fig. 71 a. Fig. 72. The term polygon is applied to figures having flat sides equidistant from a common centre. From this centre a circle may be struck that will touch all the corne...
An ellipse is a figure bounded by a continuous curve, whose nature will be shown presently. The dimensions of an ellipse are taken at its extreme length and narrowest width, and th...
In projecting, the lines in one view are used to mark those in other views, and to find their shapes or curvature as they will appear in other views. Thus, in Figure 225a we have a...
Fig. 86. Draw the line A B, Figure 86, equal to the length of stroke required. Divide it into any number of equal parts, and from C as a centre draw circles through the points of d...
The word elevation, as applied to mechanical drawing, means simply a view; hence a side elevation is a side view, or an end elevation is an end view. The word plan is employed in p...
To draw curves that are not formed of arcs or parts of circles, templates called curves are provided, examples of these forms being given in Figure 6. They are made in wood and in...
The shading or coloring of drawings by tints is more employed in large drawings than in small ones, and in Europe than in the United States; while on the other hand tinting by mean...
A figure of 3 sides is called a Trigon. " 4 " Tetragon. polygon 5 " Pentagon. " 6 " Hexagon. " 7 " Heptaagon. " 8 " Octagon. " 9 " Enneagon or Nonagon. Fig. 73. Fig. 74. The angles...
Fig. 224. Fig. 225. Fig. 225a. It is sometimes necessary to reduce a drawing to a smaller scale, or to find a minute fraction of a given dimension, such fraction not being marked o...
Mechanical drawings are made to look better and to show more distinctly by being line shaded or shaded by lines. The simplest form of line shading is by the use of the shade or sha...
Although the beginner will find that a study of geometry is not essential to the production of such elementary examples of mechanical drawing as are given in this book, yet as more...
Drawing squares or T squares, as they are termed, are made of wood, of hard rubber and of steel. There are several kinds of T squares; in one the blade is solid, as it is shown in...
Drawing squares or T squares, as they are termed, are made of wood, of hard rubber and of steel. There are several kinds of T squares; in one the blade is solid, as it is shown in...
The dimensions of mechanical drawings are best marked in red ink so that they will show plainly, and that the lines denoting the points at which the dimension is given shall not be...
It is not intended or necessary to enter into an elaborate discussion of the various kinds of drawing instruments, since the purchaser can obtain a good set of drawing instruments...
Whatever kind of drawing paper be used it should be kept dry, or the ink, however good it may be, will be apt to run and make a thick line that will not have the sharp, clean edges...
India ink should always be used for mechanical drawing: First, because it lies upon and does not sink into the paper, and is, therefore, easily erased; and, secondly, because it do...
Fig. 5. Two triangles are all that are absolutely necessary for a beginner. The first is that shown in Figure 3, which is called a triangle of 45 degrees, because its edge A is at...
Fig. 5. Two triangles are all that are absolutely necessary for a beginner. The first is that shown in Figure 3, which is called a triangle of 45 degrees, because its edge A is at...