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 226
arder woods, like mahogany, with protecting edges 70 MECHANICAL DRAWING 5 of ebony or celluloid, Fig. 6, in the more expensive instruments.The head is designed to fit against the edge of the drawing board,allowing the blade to extend across the surface of the board. It is Fig. 5. Common T-Square… … Fig. 6. Mahogany-Bound T-Square with the T-square will then be referred to one edge of the board only,and if this edge is straight, the lines will be parallel to each other.T-squares are sometimes provided with swiveled heads as it isfrequently very, convenient to draw lines parallel to each other…
Mechanical drawing · Blueprinting
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