Blessing, George F. (George Frederick), 1875-1921, Darling, Lewis A. (Lewis Andrew) · New York, J. Wiley & sons; [etc., etc.] · leaf 30
DRAWING INSTRXJMENTS AND MATERIALS 9 In its simplest form (see Fig. 4) the T-square consists of a thin*blade securely fastened at right angles to a thicker and shorterpiece termed the head. … Fig. 4. — Ordinary T-Square. In a more elaborate design the head is pivoted so that it canbe adjusted and fastened at any angle with the blade. Thisarrangement enables the draftsman to use the working edge ofthe drawing board to guide the T-square in drawing a series ofparallel hues that are not…
Mechanical drawing
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