. Railway mechanical engineer . y the Abrasive JIachine Company, Irvington, X. J.,is designed for the resharpening of old files of all resharpening of a dull file is accomplished through thegrinding action of a patented abrasive combination knownas Carboflynt, mixed with water, propelled at high velocit\-by a jet of steam through a nozzle. A cross section of the nozzle (Fig. 1) shows a flat filein the proper resharpening position, resting on the bevellededge of a block of metal called the test iron because ofthe fact that a properly resharpened file will gently adhereto its surface.
. Railway mechanical engineer . y the Abrasive JIachine Company, Irvington, X. J.,is designed for the resharpening of old files of all resharpening of a dull file is accomplished through thegrinding action of a patented abrasive combination knownas Carboflynt, mixed with water, propelled at high velocit\-by a jet of steam through a nozzle. A cross section of the nozzle (Fig. 1) shows a flat filein the proper resharpening position, resting on the bevellededge of a block of metal called the test iron because ofthe fact that a properly resharpened file will gently adhereto its surface. The correct angle of the file to the jet of Car-boflynt shown projected from the nozzle is about 30 the bevel on the test iron serves as a guide to the op-erator in handling the file. enlarged longitudinal section of the teeth of a newfile is shown at A in Fig. 2; the result of the grinding actionon the teeth of an old file is shown by the dotted lines in B,Fig. 2. It will be seen that the Carbofiynt jet grinds away. overflow pipe controls the level of the water in the vertically mounted cylindrical tank at the right handside is a water container, used for dipping files to clean themwhen drawn from tlie chamber.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
