. Railway mechanical engineer . splitting the flue at the prosser groove or breaking thebead or welded joint, the flue in the sheet will have to re-ceive part of the blow. We help out large superheater tubeswhich in hard service give trouble, by applying a 3 J-^-in- by 4-in. wide thimble of the diameter of the fluemade from scrap steel or sheet iron. It is not welded. Itis set with the butt joint at the bottom and held in placewith a flat wedge of 12 or 16-in. gage iron driven betweenthe flue and thimble at the top. The thimble absorbs someof the heat the flue end would otherwise get
. Railway mechanical engineer . splitting the flue at the prosser groove or breaking thebead or welded joint, the flue in the sheet will have to re-ceive part of the blow. We help out large superheater tubeswhich in hard service give trouble, by applying a 3 J-^-in- by 4-in. wide thimble of the diameter of the fluemade from scrap steel or sheet iron. It is not welded. Itis set with the butt joint at the bottom and held in placewith a flat wedge of 12 or 16-in. gage iron driven betweenthe flue and thimble at the top. The thimble absorbs someof the heat the flue end would otherwise get and relieves itfrom overheating to that extent. When one end of thisthimble burns off, it can be reversed. It is believed welding the flues to the back sheet will be an improvement on thatpractice, but until we are full) equipped for welding, weare getting some help from applying these thimbles. Withthe above mentioned exception, superheater tubes are workedaccording to instructions recommended by the CLOSE QUARTER DRIVE AND OLD MAN BY E. A. M. The following description refers to a device used inreaming holes in close quarters at right angles, such asguide bolt holes, saddle bolt holes, etc. It was made in oneof the large eastern railway repair shops and has given goodsatisfaction. Referring to the illustration, 1 is the main casting, ofwhich two views are shown. This casting has holes drilledat right angles to take the bushings 2 and 3, which are madeof lironze. The driving shank 4, is a solid piece of steelmachined at one end to make the bevel gear shown, and with
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
