. Canadian machinery and metalworking (January-June 1919). abovecalculations; in other words, the 70pound A. S. C. E. rail is a trifle lessthan 70 pounds. The other sections also show slightvariations. This, then, is the design ofthe finishing or No. 2 pass, except thatthe flange in the closed roll is openedup 1-64 inch from a point V2 below thecentre line, which, besides allowing therail to deliver free, makes the base ofthe rail a trifle concave, which is desir-able. It guards against a convex base,a serious defect in a rail. Careful workwith the planimeter showed that square inches
. Canadian machinery and metalworking (January-June 1919). abovecalculations; in other words, the 70pound A. S. C. E. rail is a trifle lessthan 70 pounds. The other sections also show slightvariations. This, then, is the design ofthe finishing or No. 2 pass, except thatthe flange in the closed roll is openedup 1-64 inch from a point V2 below thecentre line, which, besides allowing therail to deliver free, makes the base ofthe rail a trifle concave, which is desir-able. It guards against a convex base,a serious defect in a rail. Careful workwith the planimeter showed that square inches of area were distri-buted as follows: Square Inches. Head Web Flange or in percentage: Per Cent. Head Web 21. 46 Flange It has been the aim in the remainderof the finishing passes to keep the dis-tribution of area as close to the per-centage of the finished rail as possibleafter meeting other requirements de-manded in the design. How successfullythis has been done will be seen by re- > -•?-?-?*- ***-» « - - ^ ?i 1.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmachinery, bookyear19
