File:Blueprint reading; a practical manual of instruction in blueprint reading through the analysis of typical plates with reference to mechanical drawing conventions and methods, the laws of projection, (14594334187).jpg

Identifier: blueprintreading00fair (find matches)
Title: Blueprint reading; a practical manual of instruction in blueprint reading through the analysis of typical plates with reference to mechanical drawing conventions and methods, the laws of projection, etc
Year: 1919 (1910s)
Authors: Fairfield, Howard Parker, 1858- Kenison, Ervin Waite, Edward B. (Edward Broughton), 1873- American Technical Society
Subjects: Mechanical drawing Blueprinting
Publisher: Chicago, American technical society
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
y drawing lines perpendicularto the horizontal center line at a distance of 6^ inches from the center. Complete the figures by laying off lines ; inch and 4^ inches aboveand below the horizontal center line respectively, thus forming six4-inch squares. In drawing Fig. 1, divide A D and A B into 4 equal parts, thendraw horizontal lines through E, F, and G and vertical lines throughL, M, and N. Draw lines from A and B to the intersection 0 oflines E and M, and from A and D to the intersection P of lines F andL. Similarly draw D J, J C, CI, and I B. Also connect the points0, P, J, and I, thus forming a square. The four diamond-shapedareas are formed by drawing lines from the middle points of A D,AB,BC, and D C to the middle points of lines AP,AO,0 B,I B,etc., as shown in Fig. L Fig. 2 is an exercise of straight lines. Divide A D ai.i A Binto four equal parts and draw horizontal and vertical lines as inFig. 1. Now divide these dimensions, A L, M N, etc., and E F, 100 MECHANICAL DRAWING 35
Text Appearing After Image:
101 36 MECHANICAL DRAWING G B, etc., into four equal parts—each \ inch—and draw light pencillines with the T-square and triangle as shown. In Fig. 3, divide A D and A B into eight equal parts, and throughthe points 0, P, Q, H, I, J, etc., draw horizontal and vertical lines.Now draw lines connecting 0 and H, P and I, Q and J, etc. Asthese lines form an angle of 45 degrees with the horizontal, a 45-degree triangle may be used. Similarly from each one of the givenpoints on A B and A D, draw lines at an angle of 45 degrees to B Cand D C respectivelyo Fig. 4 is drawn with the compasses. Draw the diagonals A Cand D B, and with the T-square draw the line E H. Now markoff on jEJ i? distances of ^ inch, and with iJ as a center describe, bymeans of the compasses, circles having radii respectively 2 inches.1^ inches, 1 inch, f inch, ^ inch, and j inch. Similarly with H as acenter and a radius of If inches and 1^ inches respectively draw thearcs F G and I J and K L and M N, being careful to e

Note About Images