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 218
o ou Q ^3 o g ^ 1 Q « < e^ d. goO w ^ O 2Q MECHANICAL DRAWING PART III PROJECTIONS ORTHOGRAPHIC PROJECTION Definitions. Projection. The word projection means to throwfonvard. In mechanical drawing, the significance is to throw forwardin straight lines. Projection really means, therefore, either… … Fig. 95. Body and Its Projection plane a shape corresponding point for point with that of the body.The rays are called projecting lines. A plane may be consideredtransparent, since it is a fiat surface having no thickness. Vieiv. In Fig. 95 a body is shown as projecting from its sur-face projection…
Mechanical drawing · Blueprinting
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