International library of technology; a series of textbooks for persons engaged in the engineering professions and trades, or for those who desire information concerning them Volume 10 - International Textbook Company, Student, Paperback

• Release Date   6/26/2012
• ISBN-13   9781236475244 | 978-1-236-47524-4
• ISBN   1236475240 | 1-236-47524-0
• Format   Paperback
• Author(s)   International Textbook Company
• This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 edition. Excerpt: ...16. The foreshortened view of this section is next projected to the plan by the aid of the half-full view shown at (b), and from the points a and b lines are drawn that shall be tangent to this foreshortened view. The plan of this fitting, or as much as is necessary for the production of the pattern, is now complete, and it will be seen that the lines./ o and b o represent the miter lines, or the lines of intersection, that separate the different branches of the fitting. At this juncture the draftsman is required to select, at pleasure, an outline that shall be adopted for the full view of a section on these lines. It may be stated that the usual practice is to adopt a parabolic curve for the outline of this section, but since in this instance the drawing of such a curve would involve additional "work on the part of the student, the purposes of the present problem will be as well served if the section be considered as an arc, or quadrant, of a circle. Accordingly, a view is constructed at (c) in which the full view of the section on the line o b may be shown, and in order that the projection of this miter line may be indicated on the elevation, the view at (r/) is also drawn. After the views at (c) and (/) have been constructed, and before any points are located on the outline of the curves there shown, an important matter should be considered: Since a number of points are to be located on the lower base of the figure to be developed, and since, in accordance with preceding instruction, these points should be equal in number to those on the upper base of the solid, their arrangement should be carefully planned. the points o and b at the upper and lower extremities of the miter line are already fixed, and, if possible, the division of the...