. A textbook on mechanical and electrical engineering . Fig. 19 PROBLEM 4 tlie curved sui-face of an inter- 26. To developsected cylinder. Fig. 20 is a perspective drawing of the intersected cylinderrequired for this development; the dimensions in Fig. 4 onthe plate indicate the size the draAving must appear thereon. §1G DEVELOPMENT OF SURFACES 29 This problem is very similar to Problem 2, the only differencebeing that it is necessary to project the edge lines to theelevation in order to obtain the points oftheir intersection with the cutting these points developers are drawnto thei
. A textbook on mechanical and electrical engineering . Fig. 19 PROBLEM 4 tlie curved sui-face of an inter- 26. To developsected cylinder. Fig. 20 is a perspective drawing of the intersected cylinderrequired for this development; the dimensions in Fig. 4 onthe plate indicate the size the draAving must appear thereon. §1G DEVELOPMENT OF SURFACES 29 This problem is very similar to Problem 2, the only differencebeing that it is necessary to project the edge lines to theelevation in order to obtain the points oftheir intersection with the cutting these points developers are drawnto their corresponding edge lines in thedevelopment. The curve traced throughpoints of intersection in that portion of thedrawing is the upper outline of the devel-opment. This drawing being fully shownon the plate at Fig. 4 (cr) and (/;), the stu-dent should have no difficulty in comple-ting the problem. Since the cutting planein this problem is at an angle of 45°, the de- ^^ ^ velopment may be used as a pattern for a two-pieced PROBLEM 5 27. To develop the surfaces of tAvo Explanation.—Fig. 21 is a perspective view of intersect-ing cylinders. Since the two cylinders are of the samediameter, their axes intersecting, the lines of intersectionare represented on the drawing by straight lines. Construction.—The projections shown on the plate atFig. 0 (a) are first completed and an end view of theshorter cylinder projected as shown at (d).The outline of each cylinder in that viewin which it is represented as on edge isthen divided into a similar number ofequal spaces (IG in Fig. 5). The pointsthus located for the purpose of represent-ing the assumed edges are then projectedfrom each view to the elevation. Stretch-outs J/.^and J/.\ are then developed,tiG. 21 and edge lines are drawn perpendicular to the stretchout in each development. Developers may now bedrawn from the ends of all assumed edges in the elevation
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmechani, bookyear1902
