The T Square
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 Figure 5 on page 20; in another the back of the square is pivoted, so that the blade can be set to draw lines at an angle as well as across the board, which is often very convenient, although this double back prevents the triangles, when used in some positions, from coming close enough to
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Examples In Bolts Nuts And Polygons
<div> <img src="/images/drawing-0111-1.jpg" alt="" height="64" width="40"> Fig. 149. </div> <div> <img src="/images/drawing-0111-2.jpg" alt="" height="76" width="46"> Fig. 150. </div> <div> <img src="/images/drawing-0111-3.jpg" alt="" height="74" wi... Examples In Engine Work
<p>In the figures from 308 to 328 inclusive are given three examples in engine work, all these drawings being from <em>The American Machinist</em>. Figures 308 to 314 represent drawings of an automatic high speed engine designed and made by Professor... Examples In Line-shading And Drawings For Line-shaded Engravings
<p>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 accessory. Figure 295, for example, is intended to show an arrangement... Line Shading
<p>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 shadow line.</p> <p>In a mechanical drawing the light is supposed, for... Lines And Curves
<p>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 difficult examples are essayed he will find such a study to be of ... Marking Dimensions
<p>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 confounded with the lines of the drawing.</p> <p>The dimension fi... Names Of Regular Polygons
<div> <table summary="polygon names" border="0" cellpadding="4" cellspacing="0"> <tbody> <tr> <td align="left">A figure of</td> <td align="center">3 sides is</td> <td align="center">called a</td> <td ali... Plotting Mechanical Motions
<div> <img src="/images/drawing-0234-1.jpg" alt="" height="170" width="200"> Fig. 257. </div> <p>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... Projections
<p>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 225<em>a</em> we have a spiral, wound around a cylinder whose end is cut off at a... Reducing Scales
<div> <img src="/images/drawing-0178-1.jpg" alt="" height="135" width="139"> Fig. 224. </div> <div> <img src="/images/drawing-0178-2.jpg" alt="" height="49" width="155"> Fig. 225. </div> <div> <img src="/images/drawing-0181-1.jpg" alt="" height="408... Screw Threads And Spirals
<div> <img src="/images/drawing-0151-1.jpg" alt="" height="102" width="163"> Fig. 202. </div> <div> <img src="/images/drawing-0152-1.jpg" alt="" height="345" width="158"> Fig. 203. </div> <p>The screw thread for small bolts is represented by thick a... Section Lining Or Cross-hatching
<p>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 broken away or cut off is section-lined or cross-hatched; that is t... Shading And Coloring Drawings
<p>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 means of line-shading is more employed in the United States than in Eur... The Construction Of Polygons
<div> <img src="/images/drawing-0060-1.jpg" alt="" height="89" width="89"> Fig. 71 a. </div> <div> <img src="/images/drawing-0060-2.jpg" alt="" height="96" width="95"> Fig. 72. </div> <p>The term polygon is applied to figures having flat sides equid... The Different Views Of A Mechanical Drawing
<p>The word <em>elevation</em>, 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.</p> <p>The word <em>plan</em> is employed in place of the word top; hence a plan view is... The Drawing Board
<p>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 little rounding, so that the paper shall lie close to its surface... The Drawing Board
<p>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 little rounding, so that the paper shall lie close to its surface... The Drawing Paper
<p>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 necessary to make lines look well.</p> <p>Drawing paper is made i... The Ellipse
<p>An ellipse is a figure bounded by a continuous curve, whose nature will be shown presently.</p> <p>The dimensions of an ellipse are taken at its extreme length and narrowest width, and they are designated in three ways, as by the length and breadt... The Ink
<p>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 does not corrode or injure the drawing instruments.</p> <p>India ink... The Preparation And Use Of The Instruments
<p>The points of drawing instruments require to be very accurately prepared and shaped, to enable them to make clean, clear lines. The object is to have the points as sharp as they can be made without cutting the paper, and the curves as even and reg... The T Square
<p>Drawing squares or T squares, as they are termed, are made of wood, of hard rubber and of steel. </p> <p>There are several kinds of T squares; in one the blade is solid, as it is shown in Figure 5 on page 20; in another the back of the square is p... The T Square
<p>Drawing squares or T squares, as they are termed, are made of wood, of hard rubber and of steel. </p> <p>There are several kinds of T squares; in one the blade is solid, as it is shown in Figure 5 on page 20; in another the back of the square is p... The Triangles
<div> <img src="/images/drawing-0019-1.jpg" alt="" height="129" width="247"> Fig. 5. </div> <p>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... The Triangles
<div> <img src="/images/drawing-0019-1.jpg" alt="" height="129" width="247"> Fig. 5. </div> <p>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... To Draw A Heart Cam
<div> <img src="/images/drawing-0074-1.jpg" alt="" height="147" width="140"> Fig. 86. </div> <p>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 throu... Tracing Paper
<p>For taking tracings from drawings tracing paper or tracing cloth is used. They require to be stretched tightly and without wrinkles upon the drawing. To effect this object the mucilage should be thick, and the tracing paper should be dampened with... Triangles
<p>A right-angled triangle is one in which two of the sides are at a right angle one to the other. Figure 61 represents a right-angled triangle, A and B forming a right angle. The side opposite, as C, is called the hypothenuse. The other sides, A and... United States Standard Dimensions Of Bolts And Nuts
<div> <table summary="Std Dim Bolts" border="1" cellpadding="4" cellspacing="0"> <tbody> <tr> <td colspan="3" align="center">Bolt.</td> <td colspan="3" align="center">Bolt Head and Nut.</td> <td></td> <t...