Mechanical Drawing for Colleges and Universities
by Phillips
Format: Paperback
ISBN13: 9781152562868
Paperback|9781152562868
Out of Stock
Overview
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 edition. Excerpt: ...may be drawn along the edge of triangle B, which is at 90 to the given line. The direction in which the lines should be drawn along the triangles is shown in Figs. 136 and 137. The forearm should always make a right angle with the line being drawn. The edges of the triangles should not be cut or bruised. If they are allowed to fall on the floor a corner may be blunted and as a result the angle will not be true. The celluloid triangles should not be allowed to remain bent for any length of time, as they will remain permanently so. Fig. 138. Lines Drawn With A Combination Of The 30-60 And 45 Triangles The Irregular Curve is used for drawing a smooth curve through a series of points. It is made from the same materials as the triangles. Various sizes and forms may be had to fit different curves. Fig. 139. Lines Drawn Parallel Or Perpendicular To Any Given Line The line is drawn in sections obtained by selecting portions of the irregular curve which will pass through a number of given points. Fig. 259. It is seldom advisable to draw through all of the points of the section of the line to which the eurve is fitted, since the direction of the line at the end of the section is apt to be such that the succeeding section cannot be joined to it to produce a smooth curve. To make sure of a good joint the curve for each section should fit back a short distance on the preceding section. Scales are used for taking measurements and laying off distances. They are made of paper, steel, and wood. Ordinarily scales are made of boxwood. There are two general forms, the flat and the triangular. The flat scale may have from one to four graduated faces and the triangular scale from four to six graduated faces. The graduations are placed directly on the wooden...
| ISBN-13 | 9781152562868 |
|---|---|
| ISBN-10 | 115256286X |
| Weight | 0.35 Pounds |
| Dimensions | 9.00 x 6.00 x 0.23 In |
| List Price | $14.14 |
| Format | Paperback |
|---|---|
| Pages | 98 pages |
| Publisher | |
| Published On | 2010-01-01 |
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