Process for determining and controlling railroad rail's...

Details Process for determining and controlling railroad rail's... Process for determining and controlling railroad rail's...

G - Physics

01

N

G01N 25/00 (2006.01) G01B 5/30 (2006.01) G01K 5/00 (2006.01) G01K 5/48 (2006.01)

Patent

CA 2061014

ABSTRACT In order to determine a rail's neutral temperature, the length of an unconstrained piece of steel (or "gage") is compared with a similar length of railroad track rail which is constrained and thereby deflected at most temperatures because of the track structure's tie-in to the earth's surface. The gage represents the length that the counterpart piece of rail would be if it were not constrained by the track's connection to the earth's surface. The difference in length is an analog of an associated rail characteristic, such as the number of degrees that the rail's instantaneous temperature (e.g., in degrees F) is above or below the rail's neutral temperature. Length comparisons are made with precision measuring devices configured to directly read out in conventional units the rail characteristic being considered, such as pounds of force or rail neutral temperature in degrees F.

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