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
n which it isplaced In ordinary instruments the legs, o and p, ter-minate in simple points, which are respectively causedto traverse the grooves in the guide-plate, q, in describ-ing the ellipse. It is, however, found to be almostimpossible to obtain a smooth action with this arrangement, asthe… … 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.…
Mechanical drawing
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