. Canadian machinery and metalworking (January-June 1919). RIBER TO shape a part of solid stock isone thing, but when we have tocue from tin or other sheet metali piece that, when bent into shape, willjust like it, we have an entirelylifferent proposition and one that callsiore or less imaginative power. Inresenting a few examples of this de-scription it is hoped to help those not•.imiliar with this class of work to seem\ some things look before bending andhow to correctly lay them out either onpaper or metal before cutting out toend into shape. On the accompanying illustrations the-ubject is
. Canadian machinery and metalworking (January-June 1919). RIBER TO shape a part of solid stock isone thing, but when we have tocue from tin or other sheet metali piece that, when bent into shape, willjust like it, we have an entirelylifferent proposition and one that callsiore or less imaginative power. Inresenting a few examples of this de-scription it is hoped to help those not•.imiliar with this class of work to seem\ some things look before bending andhow to correctly lay them out either onpaper or metal before cutting out toend into shape. On the accompanying illustrations the-ubject is shown in black heavy lines,a hile all construction lines are madelight and extend beyond the subject ex-ept when they come on a centre line,hen the centre line is shown in dot andand it is also used for a construc-tion line. Fig. 1 shows a rectangle, which needsi explanation as it is evident that allis required is four sides, two 6 by 4 in. wide, two 6 in. long by 2 , and two ends 2 in. by 4 in. ar-id to bend as shown by the pattern, FIG J. Ci/t. FJtPMT Y/£W S/£>£ y/£w- FIG. 3. F/6 J. F/G g. t _L A+ t1* 6~ r* 4~- *? ?< -4-- —* ?*-f-^» 1 i - FIGUEE 1 Fig. 2, this being the common layout ofa cardboard box except that strips forpasting together are usually provided insuch a layout. In Fig. 3 we follow out the same prin-ciple, but it is more complicated. Wefirst draw three views of the hexagonrequired, namely, front view, top view,and side view; we then cut off thehexagon to the line A, the next drawingrequired is obtained by drawing a viewat right angles to the line A, the lengthB-C is equal to D-E, while the widthsof this view are obtained from the frontview, F-G and H-I respectively. Nextwith J as a radius draw an arc with aradius equal to K-L, and lay off on thisarc six sides to represent the hexagonalpyramid at its base. Now, by measur-ing the distance from the base of thepyramid to the line that it is to be cutoff on, along the respective lines, an
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmachinery, bookyear19
