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1. (WO1986003582) MESURE DES CHARGES TRANSMISES PAR DES ROUES DE VEHICULES
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CLAIMS
1. Apparatus for measuring loads transmitted via
wheels to a track from vehicles travelling thereon, comprising means responsive to load at a plurality of approximately equally spaced locations on a selected portion of the track at least about equal in length to the circumference of
a typical wheel passing thereover, for providing a signal that is a function of the largest load on the track from each wheel,
means responsive to the signal for comparing each largest load with at least one selected load level, and
means responsive to the load comparing means for identifying each wheel from which any load greater than a selected level was transmitted.
2. Apparatus as in Claim 1, wherein each load responsive means comprises means for providing an analog signal responsive to the strain on the track.
3. Apparatus as in Claim 2, wherein the strain responsive means comprises means for comparing each signal with the largest earlier signal for the same wheel.
4. Apparatus as in Claim 3, wherein the load comparing means comprises means for converting the largest analog signal for each wheel to a digital signal and means for comparing it with a digital signal corresponding to a selected load level.
5. Apparatus as in Claim 3, wherein the load responsive means comprises means for converting each analog signal to a digital signal.
6. Apparatus as in Claim 5, wherein the load comparing. means comprises means for comparing the largest digital signal for each wheel with a digital signal corresponding to a selected load level.

7. Apparatus as in Claim 1, wherein the load responsive means comprises means for determining when a load at a
given location is from a different wheel than the wheel that transmitted the last previous load there.
8. Apparatus as in Claim 1, wherein the load comparing means comprises means, remote from the load responsive
means, for varying each selected load level.
9. Apparatus as in Claim 1, wherein the identifying means is remote from the load responsive means.
10. Apparatus as in Claim 1, wherein the identifying means comprises means for recording the largest load from each wheel that has transmitted a load greater than a selected level.
11. Apparatus as in Claim 1, wherein a first selected load level is set at a value useful for warning that a
wheel is approaching a condition needing maintenance and a second selected load level is set at a value indicating that a wheel should be replaced immediately.
12. Apparatus as in Claim 11, wherein the values
are adjusted to provide a balance between unnecessary preventive maintenance and inadequate protection from damage.
13. Apparatus as in Claim 11, for use with typical railway vehicles and track during normal operation wherein the first load level is about 45 to 55 kips and the second load level is about 65 to 75 kips.
14. Apparatus as in Claim 1, wherein the load responsive means comprises means, responsive to the approach of a
vehicle on the track toward the selected portion thereof, for automatically putting the apparatus in a predetermined initialized state for effective operation.
15. Apparatus as in Claim 1 for use with typical
railway vehicles, wherein the load responsive means comprises means for recognizing the presence of each individual car in each train of vehicles and means for recognizing the
presence of each individual axle on each car.
16. Apparatus as in Claim 15, wherein the car recognizing means and the axle recognizing means comprise means
responsive to the times when loads are present.
17. Apparatus as in Claim 15, wherein the wheel identifying means comprises means for counting the number of
cars in each train and the number of axles on each car,
and means responsive to the counting means for determining the specific car and axle thereon from which each load
greater than a selected level was transmitted.
18. Apparatus as in Claim 16, wherein the time responsive means comprises means for identifying missing, extraneous, and other anomalous load data.
19. Apparatus as in Claim 18, wherein the anomalous data identifying means comprises means for minimizing any inaccuracy from such anomalous data.
20. Apparatus as in Claim 1, comprising a combination of components substantially as disclosed in Figure 6 of
the drawings hereof and the description relating thereto in the foregoing specification.
21. Apparatus as in Claim 1, comprising a combination of components substantially as disclosed in Figures 15
and 16 of the drawings hereof and the description relating thereto in the foregoing specification.
22. Apparatus as in Claim 1, comprising means for providing a controlled sequence of operations substantially as disclosed in Figure 14 of the drawings hereof and the description
relating thereto in the foregoing specification.
23. Apparatus as in Claim 1, comprising means for
providing a controlled sequence of operations substantially as disclosed in Figures 17 and 18 of the drawings hereof and the description relating thereto in the foregoing specification.

24. Methods and/or apparatus for measuring loads
transmitted via wheels to a track from vehicles travelling
thereon, and for processing data related to such loads,
substantially as disclosed in any portion of the foregoing
specification and/or in any of the drawings hereof.
25. Methods and/or apparatus as in Claim 24, comprising means for, and/or the steps of, providing a combination
of operations substantially as disclosed in Figure 14 and/or
Figures 17 and 18 and/or the description relating thereto
in the foregoing specification.