. A practical workshop companion for tin, sheet iron and copper plate workers : containing rules for describing various kinds of patterns used by tin, sheet iron and copper plate workers : practical geometry, mensuration of surfaces and solids, tables of the weights of metals, lead pipe, etc., tables of areas and circumferences of circles : japans, varnishes, lackers, cements, compositions, etc., etc., y_ < Set off the Hue ABC, fig. 60, equal iu length to the circumfer-ence of the pipe DF ; divide the line ABC into four equal parts,and erect the lines AD, 01, BF, 01, CE ; set off on e
. A practical workshop companion for tin, sheet iron and copper plate workers : containing rules for describing various kinds of patterns used by tin, sheet iron and copper plate workers : practical geometry, mensuration of surfaces and solids, tables of the weights of metals, lead pipe, etc., tables of areas and circumferences of circles : japans, varnishes, lackers, cements, compositions, etc., etc., y_ < Set off the Hue ABC, fig. 60, equal iu length to the circumfer-ence of the pipe DF ; divide the line ABC into four equal parts,and erect the lines AD, 01, BF, 01, CE ; set off on each side of01, 01, the same number of equal distances as in one-half thesemicircle; from the points draw lines parallel to BF; make AD,BF and CE equal to HF ; make 01, 01 equal to BG ; also, eachof the parallel lines bearing the same figures as 22, 22, 33, 33,i\i. ; then a line traced through the points will form the pattern. Edges to be allowed. 62 PEACTICAL RULES ELBOWS. To describe an JSlbow at Bight A3 a Let ABCD, fig. 61, be the given elbow ; draw the line AB atright angles to BC ; draw the line FC ; describe the semicircleAGB; divide the semicircle into any number of equal parts ; fromthe points draw lines parallel to BO, as 1, 2, 3, &c. FOR DESCRIBING PATTERNS. G3 Fig. 62, ^ 1 ) 11 ») / / / in / / / / d / rj m \ \ \ \ \ \ >^ \ s \ 9\ Ci — • —, < Set off the line ABC, fig. G2, equal in length to the circumfer-ence of the elbow AB ; erect the perpendicular lines AD, BE andCF; set off on each side of BE the same number of equal dis-tances, as in the semicircle AGB ; from the points draw lines par-allel to BE ; make BE equal to BC ; make AD and CF equal toAF ; also, each of the parallel lines bearing the same figures as11, 22, 33, &c. ; then a line traced through the points will formthe pattern. Edges to be allowed. Patterns for Elbows may be described at any angle, by any ofthe Rules for cutting Elbow patterns; in laying out Elbow pat-terns let AB
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Keywords: ., bookcentury18, bookdecade1870, booksubjectmetalwork, bookyear1876
