. A textbook on mechanical and electrical engineering . ERY Engineer JOHN SM/TH, CLASS N94529. 16 DEVELOPMENT OF SURFACES 31 Interedge lines are indicated by dash-and-double-dotlines. Represent developers by broken lines. Represent the stretchouts by heavy full lines. DRAWi:NrG JliATE, TITLE: ]S^TS II PUOllLEM G 2^. To develop the surfaces of two inteisectingprisms. The prisms developed in this problem are the octagonaland quadrangular solids whose projec-tion was given in Practical Projectionin order to show views of intersectingprisms. CoNSTRucTiox.—The developmento
. A textbook on mechanical and electrical engineering . ERY Engineer JOHN SM/TH, CLASS N94529. 16 DEVELOPMENT OF SURFACES 31 Interedge lines are indicated by dash-and-double-dotlines. Represent developers by broken lines. Represent the stretchouts by heavy full lines. DRAWi:NrG JliATE, TITLE: ]S^TS II PUOllLEM G 2^. To develop the surfaces of two inteisectingprisms. The prisms developed in this problem are the octagonaland quadrangular solids whose projec-tion was given in Practical Projectionin order to show views of intersectingprisms. CoNSTRucTiox.—The developmentof Case I of that problem is shown inFig. 22. Note that interedge lines arerequired for the development of bothsolids, their positions being found byprojectors drawn from the different. \ I I i«~vr views of the drawing to the fullview of the end, as shown inFig. 22. Case II of the problem referredto is developed in a similar man- FlG. 22 A 1 • ,- , ner. A drawmg of the latter willform the first development for this plate, and the projections 32 DEVELOPMENT OF SURFACES § 10 are accordingly reproduced as shown at Fig. 1 (a) of thisplate. In order to avoid confusion of lines, projectors aresometimes drawn as shown on this plate; that is, only theirstarting points are indicated, as between the two views ofthe octagonal prism in this drawing. Next, develop thestretchouts for the two solids, as at J/iV and M N\ anddraw edge and interedge lines through their respectivepoints. The positions of the interedge lines are found byprojecting the point A in the plan across to the full view,as shown at [d), afterwards locating the points x and yat x and J in {d); thence, they are projected to the eleva-tion and carried to the development in the usual manner,the resulting figures
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmechani, bookyear1902
