Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 280
2 and 3, and by movingthe rod round (the outside head having apencil fitted in it) the ellipse is describedby one continuous line. Eig. 842 shows thetrammel in position, while Eig. 843 showsan enlarged detail of one end of the bar.The frame of the trammel is usually madeof mahogany or some other… … Fig. 848.—Detail of Ribs, and Joints at D and E (Fig. 844). The frame of the trammel is held togetherby a small wood screw at each corner. Itssize depends, of course, upon the size ofthe ellipse to be described, but one framewill describe ellipses of various diameters. Fig. 849.—Eleva-tion of…
Carpentry · Joinery
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