The practical draughtsman's book of industrial design, and machinist's and engineer's drawing companion: forming a complete course of mechanical, engineering, and architectural drawing. (1857)
Armengaud, aîné (Jacques-Eugène), 1810-1891, Armengaud, Charles A., 1813-1893, Amouroux, Jules, Johnson, William, 1823-1864 · New York : Stringer & Townsend · leaf 196
d into the block at h, from behind, for the convenience ofholding the instrument when in use, and the end of this handle ishollowed to receive the small projection, f, on the knife, c, for thefacility of holding it when detached for the purpose of sharpeningthe edge. An adjustable guide, i, is… … Fig. 2. In usmg this instrument, the pencil is simply passed betweenthe two guide-arms, K, and its end is inserted in the conical hole, b.It is then turned round between the finger and thumb, and theknife-edge coming into contact with the end to be sharpened,quiekly pares off the material. By this…
Mechanical drawing
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