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 200
Fig. 30. nn uneven outline. In tho instrument represented in figs. 20 and30, the parts which traverse tho guide-grooves in the plate, q, con-sist of small steej wheels, o,p, carried in tho forked ends of tho * Sec page 17. steel spindles, o, p, which are entered loose into the socket legs,o, p.… … Fig. 32. tion with regard to the grooves, whatever be the position of the bar,K, and pen, s. In adjusting the instrument, it is simply necessaryto set the pen and centre legs, so that the distance of the twolatter from the former shall correspond respectively with thesemi-transverse and…
Mechanical drawing
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