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 294
MECHANICAL DRAWING PART III PROJECTIONS ORTHOGRAPHIC PROJECTION Definitions. Projection. The word projection means to throwforward. In mechanical drawing, the significance is to throw forwardin straight lines. Projection really means, therefore, either theact or the result of projecting parallel… … 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 flat surface having no thickness. View. In Fig. 95 a body is shown as projecting from its sur-face projection…
Mechanical drawing · Blueprinting
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