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 (1863)
Armengaud, aîné (Jacques-Eugène), 1810-1891, Armengaud, Charles A., 1813-1893, Amouroux, Jules, Johnson, William, 1823-1864 · Philadelphia : H.C. Baird · leaf 194
d into the block at h, from behind, for tho convenience ofholding the instrument when in use, and tho end of this handle ishollowed to receive the small projection, f, on tho knife, c, for thofacility of holding it when detached for the purpose of sharpeningtho edge. An adjustable guide, I, is… … Fig. 2. In using 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,quickly pares off the material. By this…
Mechanical drawing
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