Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . Figure X05Lining off conical sheet before rolling The Derry Collird Co. each one of these places. The sheet is now entered intothe rolls and straightened up with the first chalk is then run back and forth a short distance on each sideof the line and then the top roll is released. The sheetis then bumped around so as to be straight with the nextline and so on until the two ends of the slope sheet gradu-ally work their way together. If an outside crown sheetof a Belpaire boiler, Fig. 1
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . Figure X05Lining off conical sheet before rolling The Derry Collird Co. each one of these places. The sheet is now entered intothe rolls and straightened up with the first chalk is then run back and forth a short distance on each sideof the line and then the top roll is released. The sheetis then bumped around so as to be straight with the nextline and so on until the two ends of the slope sheet gradu-ally work their way together. If an outside crown sheetof a Belpaire boiler, Fig. 106, was to be bent, a gagewould be made to conform to the shape of the front endof the sheet, and also one for the rear end of the sheet would be entered into the rolls and after hav- 136 Examples of conical sheets. ing a center line marked on it would be lined up to therolls by this center line. The top roll will now be brought down slightly out. Figure 106Crown sheet of Belpaire boiler. of level and then this sheet must be run back and forthalong the center, occasionaly running the plate far
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Keywords: ., bookcentury1900, bookdecade1910, bookidlocomotivebo, bookyear1912
