Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 280
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 Four-ringArch and Centre.… … Fig. 850.-SectionthroughCentre. 256 CARPENTRY AND JOINERY. together, and fixed with bolts and dog irons,as indicated in the sketches. Fig. 844 showsa centre braced so that it is only necessaryto be supported at each end, leaving a free wedges are used for raising or lowering thecentre slightly, so…
Carpentry · Joinery
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