Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . 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. Figure 107Crown and side sheets. enough through so as to be able to apply the gagesfront and back. By carefully manipulating the top roll 137 Making welt strips. and also watching the sheet so as to keep it lined up prop-erly the curvature of the sheet will gradually be made tocreep around to and finally conform exactly with eachgage. If the ra
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . 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. Figure 107Crown and side sheets. enough through so as to be able to apply the gagesfront and back. By carefully manipulating the top roll 137 Making welt strips. and also watching the sheet so as to keep it lined up prop-erly the curvature of the sheet will gradually be made tocreep around to and finally conform exactly with eachgage. If the radius X is small, this sheet will be flangedon the ends by heavy wooden mauls. A fire box crown and side sheet is shown in As the front and rearend of the sheet are differentin shape it cannot be runstraight through the bendingrolls. This sheet like the gus-set sheet already mentionedmust have a center line laidoff on it. Then all the quar-ter lines, and at least one in-termediate line between thequarters must be laid off. Thesheet is first entered into therolls and the ends of the sheetare cut to conform to thegauge. After both ends have been treated in this manner the sheet is removed, turnedupside down and re-entered into the rolls. I
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Keywords: ., bookcentury1900, bookdecade1910, bookidlocomotivebo, bookyear1912
