A practical work-shop companion for tin, sheet-iron, and copper-plate workers ... with numerous valuable receipts and manipulations for every-day use in the work-shop (1904)
Blinn, Leroy J. [from old catalog] · Philadelphia, H. C. Baird & co. · leaf 50
m. Draw EE perpendic-ular to EE and equal to the height (which either is OVAL. ^ given or can be found as in II. of last problem), and joinEE, then EE is the true length of a slant of the face BCBC of the frustum. Join DC and find its true length(DC) by drawing CC perpendicular to DC and equal… … Rg. 38. AA and AB, then AA and AB are the true lengths ofDA and BA respectively. To draw the pattern of the face BCBC draw EE(Fig. 38) equal to EE (Fig. 37), and through E andE draw BC and BC perpendicular to EE. Make EC,EB, EC and EB equal to EC, EB, EC and EB(Fig. 37) respectively ; join CC and…
Metal-work
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