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, (14593989339).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

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Text Appearing Before Image:
141 Projection methods 142 Projection lines 146 Ground line 146 Rules of projection 147 Practical problems 149 True length of lines 153 True length by revolving horizontal projection 154 True length by revolving vertical projection 154 Representation of objects 155 Rectangular prism of block 155 Triangular block with square hole 156 Rotating and inclining of objects 156 Method of rotating object 156 Pyramid 157 CyUnder in inclined position to horizontal plane 158 Intersections 164 Planes with planes 164 Planes with cones or cylinders 169 Development of surfaces 172 Right cyhnder 173 Right cone 174 Cone 175 Regular triangular pyramid 176 Truncated circular cyhnder 177 Isometric projection 179 Isometric of cube 179 Applications of isometric projections 182 Characteristics of various isometrics 182 Oblique projection 189 Comparison with isometric 189 Characteristics of method 189 Line shading 192 Lettering 194 Types of lettering 194 Size of letters . . 194 Titles for working drawings 199
Text Appearing After Image:
BLUEPRINT READING INTRODUCTION Definition of Blueprint. A blueprint as used by engineers andby workmen in the various industries is a reproduction of what isknown as a icorking drawing. A working drawing, as made by thedraftsman, shows by means of lines what the piece, machine, orconstruction is, gives the necessary working dimensions and what-ever other data the workman needs to know in order to build thepiece or the structure; in other words, it is the drawing by whichthe workman does his work and to which he looks for his informa-tion when building the structure or machining the part. However,it is essential that the working drawing itself be preserved forreference in the drafting room, and therefore a blueprint is madefrom the working drawing and this is what the workman uses athis machine or in the field. The lines, numerals, and letters onthe original working drawing are black on a white background butthese appear on the blueprint as white lines on a blue background;hence the na

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