. Railway mechanical engineer . dent. Chesapeake & Ohio, Huntington. W. Va. Superheater smoke tubes, because of their large diameter, arevery readily injured by rough handling. Indentations are formedin removing and rattling, especially where coke or old arch brickis used in the rattler to assist in removing scale. They not onlyform obstructions which interfere with the insertion of thesuperheater elements but also increase the liability of the tubesto collapse under pressure. A jack for removing indentations from 5->^ in. tubes is shownin the engraving. After the tubes have been rattled an
. Railway mechanical engineer . dent. Chesapeake & Ohio, Huntington. W. Va. Superheater smoke tubes, because of their large diameter, arevery readily injured by rough handling. Indentations are formedin removing and rattling, especially where coke or old arch brickis used in the rattler to assist in removing scale. They not onlyform obstructions which interfere with the insertion of thesuperheater elements but also increase the liability of the tubesto collapse under pressure. A jack for removing indentations from 5->^ in. tubes is shownin the engraving. After the tubes have been rattled and welded they are carefully nispcck-d fur iiuk-niations. which are markedwith chalk. The air jack, which is attached to a piece of -jiin. pipe about 30 ft. long, is-placed over each indentation on theoutside of the tube and the pipe marked with chalk at the endof the tube. The jack is then inserted in the tube, the chalkmarks on the pipe serving as guides for its projjcr location under K—..-/^ ^^- *^ Screia ^^.^^^Doml Pin. Device for Removing Indentations from Superheater Smoke Tubes the indenlatiuns. When properly placeil air is applied and bylightly striking the tube with a hammer the indentation is quicklyremoved and the tube pressed back into perfect shape. Thiswork can be done with great rapidity and the tulics are in perfectcondition when returned to service. HORIZONTAL DRILLING ATTACHMENTFOR A RADIAL DRILL BY V. T. KROPIDLOWSKI The horizontal drilling attacliment shown in the illustrationmay be used to good advantage on a radial drill for counter-sinking holes in the flanges of back tube sheets and many otheroperations of a similar nature. The body of this device, shownat A, may be forged solid from a piece of mild .teel. such as
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
