Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . rained in service, thissmall thin strip becomes loose and wehave a leaky seam. If, however, thecalking tool is pounded more firmlyinto the sheet, we get an amount ofmetal, Fig. 275, much greater than be-fore, making a solid connection be-tween the sheets. The amount of con-tact, or of distance T, is what makesthe calked edge good or bad. A calking tool is shown at F, It consists of a hexagonal pieceof tool steel, drawn out and roundedoff at the end C, as indicated. Thisillustration
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . rained in service, thissmall thin strip becomes loose and wehave a leaky seam. If, however, thecalking tool is pounded more firmlyinto the sheet, we get an amount ofmetal, Fig. 275, much greater than be-fore, making a solid connection be-tween the sheets. The amount of con-tact, or of distance T, is what makesthe calked edge good or bad. A calking tool is shown at F, It consists of a hexagonal pieceof tool steel, drawn out and roundedoff at the end C, as indicated. Thisillustration also represents a sectionthrough a fire box seam and theseseams calked inside and outside as in-dicated. The edges of the sheet shouldbe beveled off as shown. - In Fig. 277, we notice a singleriveted seam which has been calked in-side and out. The metal at C and D iscalked tight enough to form perfect 281 &1 The Derry Oollard Co. Figure 278Calking Tool gage. contact from Pneumatic hammers. the outer edge of the sheet in as far as the gage for the calking tool is represented in Fig. Figure 279 Pneumatic hammer. The Derry Collard Co. The different notches are marked with the figures whichrepresent the thickness of the plate for which a tool
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Keywords: ., bookcentury1900, bookdecade1910, bookidlocomotivebo, bookyear1912
