. Railway mechanical engineer . as also been used successfully in assembling loco-motive jackets, various kinds of tinware, etc. Welding Tubes and Flues—Another amplication of electricwelding which has as yet been little employed is the buttwelding of tubes and flues. This insures a good, sound weld,permits the welding of safe-ends of any length, gives a com-pact and clean outfit, comfortable for the workman to handle,and heats the two abutting ends to a welding heat in the fullview of the operator. Another interesting characteristic isthat it refuses to weld tubes which have become too thin,a
. Railway mechanical engineer . as also been used successfully in assembling loco-motive jackets, various kinds of tinware, etc. Welding Tubes and Flues—Another amplication of electricwelding which has as yet been little employed is the buttwelding of tubes and flues. This insures a good, sound weld,permits the welding of safe-ends of any length, gives a com-pact and clean outfit, comfortable for the workman to handle,and heats the two abutting ends to a welding heat in the fullview of the operator. Another interesting characteristic isthat it refuses to weld tubes which have become too thin,as the tube will burn before the standard safe-end is broughtto a welding heat. Another important development in flue welding is the useof a machine holding the flue rigidly clamped and applyingthe pressure to weld flues with an expanding roller. Thismethod of welding has been found very efficient and leavesa flue which is perfectly smooth inside and outside. It alsopermits the reclaiming of old flues by welding a flue of con-. Complete Modern Tool Heat Treating Department siderable length to the portion of the original flue left afterremoving the safe-ends. Car Department Progress in the car department has been marked by theconstruction of shops equipped with overhead travelingcranes and electric hoists to facilitate the repairing of addition there is growing recognition of the necessity forample equipment of radial drills, bulldozers, forging presses,and punching and shearing machinery to adequately takecare of the needs in this department. The greatest need inthis field is for the further development of well-equippedcar repair shops, permitting repairs to be made wholly undercover during inclement weather. Among the developments, as yet limited, is the use of June, 1921 RAILWAY MECHANICAL ENGINEER 345 portable electric drills to relieve overloaded air compressorunits. Compressed air distribution involves large losses inpower owing to frictional resistance in air flo
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
