Self-Help Mechanical Drawing: An Educational Treatise

_This work is most kindly and respectfully dedicated to THE COMING MAN who at the present time is undoubtedly devoting a goodly share of his spare time to the study of drawing._

In example, fig. 21, the arrangement of the points is changed--let the student draw at the words, as follows: _One_, a point; _two_, a point above at the left; _three_, a point...

The first effort should, therefore, be to produce a line of points exactly parallel with the upper edge of the paper, and at equal distances from each other. Commence with point...

When a series of parallels are required perpendicular to a base line _A B_, they may be drawn as in fig. 107 through points in the base line set off at the required distances ap...

To be perfect in construction, a tee-square should be as light as is consistent with its necessary strength and stiffness of parts; it should be made of suitable material easily...

If it is a shop drawing or sketch not to be preserved, use detail paper, which is the most economical and will stand a great deal of handling without becoming soiled. If it is a...

It is not always possible to get a view against a face or side of the object, but, with irregularly shaped bodies or under special conditions, it may be necessary to take a view...

Fig. 260 shows the mode of representing two different materials in one plane, or a section may be represented by the darker portion, and the lighter shaded portion being a surfa...

Fig. 268 represents a pair of miter wheels in gear; it will be noted that the shafts, when connected, will be at right angles to each other, the wheels being in all particulars...

Each applicant for a patent is required by law to furnish a drawing of his invention whenever the nature of the case admits of it. The drawing must be signed by the inventor or...

In fig. 305 we have a rough sectional diagram of the eye and an object in front of it. This object, an arrow, is seen by means of the visual rays proceeding from it, the princip...

+-----------+---------- Diam.| Area. | Circum. -----+-----------+---------- 0.0 | | .1 | .007854| .31416 .2 | .031416| .62832 .3 | .070686| .94248 .4 | .12566 | 1.2566 | | .5 |...

+--------+--------+---------+------+------+----------+------ | | | Washburn| | | | Number|American|Birming-| & Moen | Impe-| | U. S. |Number of |or Brown| ham, or|Mfg. Co.,| ria...

=Perspective Drawing= def. 47, illus. 250 Definitions of Terms used in 249 Geometrical Terms used in 248 Of a Bridge, illus. 249 Scale or Approximate 257 Vanishing Point, illus....

=Wheel=, Bevel, A, illus. 203 Crown, illus. 208 Helical, A, illus. 207 Hub, Section-Lining, illus. 184 Internal Gear, desc. 201, 207 Miter, A, illus. 204 Proportions of the Teet...