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 (1919)
Fairfield, Howard Parker, 1858-, Kenison, Ervin, Waite, Edward B. (Edward Broughton), 1873-, American Technical Society · Chicago, American technical society · leaf 236
12 equalparts and each division represents one inch. If the smallest divisionon a scale represents -jV inch, the scale is said to read to yV inch. Scales are often divided into TV> ^, -g^, tY> e^c-> f°r architectsand civil engineers, and for measuring indicator cards. The scale should… … Fig. 31. Protractor made of metal the central portion is cut out, Fig. 31, so that the drafts-man may see the drawing. The outer edge is divided into degrees 81 MECHANICAL DRAWING and tenths of degrees. To lay off the required angle—use a verysharp, hard pencil in order that the measurements may be…
Mechanical drawing · Blueprinting
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