Loading patent…
AssigneeFranz Plasser Bahnbaumaschinen-Industriegesellschaft m.b.H.
InventorsJosef Theurer, Johann Hansmann, Klaus Riessberger
Estimating the term…
A measuring carriage for measuring the undulations and ripples of a worn rail head running surface is guided along the rail head by a pair of guide rollers laterally guiding the carriage along a portion of the gage side of the rail head which is not worn and a plurality of additional guide rollers selectively engageable with the running surface of the rail head for vertically guiding the measuring carriage along the running surface upon engagement therewith. The additional guide rollers include a pair of inner guide rollers, a pair of outer guide rollers and a pair of intermediate guide rollers spaced from each other in the operating direction. The pair of outer guide rollers defines a rigid measuring reference in the wave length of the longer undulations and they are spaced from each other a distance of 2 m. A respective lateral pair of the inner or intermediate guide rollers is selectively engaged with the running surface to define a rigid measuring reference in the shorter wave length of the ripples and these rollers are spaced from each other at least about 1/6th to 1/8th of the first-mentioned distance. A rail head running surface sensing element is vertically adjustably mounted on the measuring carriage substantially centered between the pairs of guide rollers.
A mobile apparatus mounted on a railroad track for movement in an operating direction, the track including two rails each having a rail head defining a gage side, a field side and a running surface, the apparatus being arranged for measuring and indicating such running surface irregularities as undulations and ripples, which comprises
Dependencies are inferred from the claim text.