. Railway mechanical engineer . by the use of the universal ripping table; will rip 27 and cut off 15 in. wide by the use of the plain table;will cut up to 3 in. thick with a 14-in. saw, or 4 in. thickwith a 16-in. diameter saw, and will work dados up to 4 With mortising and boring attachment it will boreholes 6 in. deep up to 2 in. in diameter, and will mortise holesup to %-in. square and 4 in. deep. Measuring Temperatures in Stored Coal ANEW DEVICE fur indicating the thermal conditionsof stored soft coal has been placed on the market re-cently by F. C. Thornley & Co.,
. Railway mechanical engineer . by the use of the universal ripping table; will rip 27 and cut off 15 in. wide by the use of the plain table;will cut up to 3 in. thick with a 14-in. saw, or 4 in. thickwith a 16-in. diameter saw, and will work dados up to 4 With mortising and boring attachment it will boreholes 6 in. deep up to 2 in. in diameter, and will mortise holesup to %-in. square and 4 in. deep. Measuring Temperatures in Stored Coal ANEW DEVICE fur indicating the thermal conditionsof stored soft coal has been placed on the market re-cently by F. C. Thornley & Co., Inc., New York, andis called the Thornley coalometer. Bituminous coal has thewell known property of spontaneously heating in certainspots and at varying depths. This heating does not alwayscause actual combustion, in the sense that the coal burns withthe presence of flame, although this condition is often en-countered. There does exist almost universally, however,in stored coal of this character, a slow combustion which is. Fig. 1—Triple Unit Thornley Coalometer even more destructive than combustion by flame, owing to thefact that it cannot be so readily detected. This slow com-bustion goes on unnoticed throughout an ever-increasing zonebeneath the surface of stored coal. The Thornley coalometer consists of a set of temperatureindicators encased in a long pointed steel tube, carrying atvarying depths metal bulbs (corresponding to the bulbs ofthermometers), and at its upper end a set of dials andpointers, which indicate, under all atmospheric conditions, the exact temperature of the bulbs which actuate units are forced down into the coal pile to definitedepths and at various points, and collectively furnish definitedata to the consumer as to the exact temperatures existingbeneath the surface. If an accurate record of daily readingsof these instruments is kept, the slightest rise in temperatureis at once detected, and should it become excessive, the con-sumer can re
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
