Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . off the front and back line of the the drawing gives sufficient details to locate someof these rivets, but often this is left entirely to the layout case nothing is specified, begin the front and back rivetson the top center, also settle on the location for the rivets onthebottom of the sheet. With a measuring wheel get the runof the boiler inside on the front between these extreme this on th
Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . off the front and back line of the the drawing gives sufficient details to locate someof these rivets, but often this is left entirely to the layout case nothing is specified, begin the front and back rivetson the top center, also settle on the location for the rivets onthebottom of the sheet. With a measuring wheel get the runof the boiler inside on the front between these extreme this on the sheet, and see that the same checks up withtlie sheet, to which this top throat sheet is to be riveted. Withthe dividers lay off the desired number of rivets; all will beequally spaced unless otherwise specified. BACK HEAD. The back head of a locomotive boiler with a medium widthfire-box is shown in Fig. 50. The flange is sH inches deep c 1. Fig. 40 Fig. 47 and the plate is 14 inch thick. The fire door is oval, and isflanged in. The connection for fire door to back fire-doorsheet is made in such a way that the flange of the back headtelescopes the flange of the fire-box sheet. The whole thingis riveted up similar to the fire-box sheet shown in Fig. 46. Lay out the left-hand portion of Fig. 50, either on the sheetwhich has been ordered for this head or on a neighboringsheet, measure off a distance R along the neutral line of thesheet, after having laid out the center lines CC and the radius R -\- 1/2 inch for the outline of the upperportion of this sheet. Lay off the distance A, which cor-responds to the out-to-out distance of the head when off a distance C on each side corresponding to B, anddraw the limiting line of the sheet all around. Also measuredown from the center line a distance 26^ inches for the firedoor. Measure off the distance E along the neutral line andlay off £ -|- 54 inch as shown :
Size: 1667px × 1499px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
