US3638482A
Expired / Lapsed
US
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Method and apparatus for indicating track conditions
Assignee: Franz Plasser Bahnbaumaschinen Industrie GmbH
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Filing: 1969-05-08
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Granted: 1972-02-01
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Expires: 1989-05-08
Abstract
Abstract Changes in acceleration caused by local track conditions are directly or indirectly measured as a car moves over a track section. The resultant signals are totalled to produce a signal or parameter characteristic of the track section condition, and this is compared with a comparison signal characteristic of a track condition norm.
Inventors
- 👤 Egon Schubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:27
CPC Classifications
G; G01; G01M; G01M99/00; B; B61; B61K; B61K9/00; B61K9/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
120 words
A method of indicating the condition of a railway track, comprising the steps of moving a car over a plurality of successive sections of the track, the velocity of the car being constant in each track section, producing individual signals corresponding to local changes in acceleration transversely of the direction of elongation of the track, said acceleration changes being due to changing local conditions of the track, totaling the individual signals, the values of the individual acceleration changes being based on a uniform car velocity, to produce an indicium characteristic of the condition of the track consisting of the successive track sections, and comparing the indicium with a like indicium of a track condition norm measured at the same velocity.
Claim 2
Independent Claim
120 words
A method of indicating the condition of a railway track, comprising the steps of moving a car over a plurality of successive sections of the track, the velocity of the car being constant in each track section, producing individual signals corresponding to local changes in acceleration transversely of the direction of elongation of the track, said acceleration changes being due to changing local conditions of the track, totaling the individual signals, the values of the individual acceleration changes being based on a uniform car velocity, to produce an indicium characteristic of the condition of the track consisting of the successive track sections, and comparing the indicium with a like indicium of a track condition norm measured at the same velocity.
Claim 3
Dependent Claim
17 words
The method of claim 1, wherein said acceleration changes are measured electrically and said signals are electric.
Claim 4
Dependent Claim
25 words
The method of claim 1, wherein changes in acceleration are separately measured in two different planes, and said changes are transformed into said measuring signals.
Claim 5
Dependent Claim
13 words
The method of claim 3, wherein said planes are perpendicular to each other.
Claim 6
Dependent Claim
28 words
The method of claim 4, wherein one of said planes is defined by the track and the other plane extends perpendicularly thereto in the direction of the track.
Claim 7
Dependent Claim
22 words
The method of claim 3, wherein the vector sum of all of said indicium is established to arrive at said characteristic signal.
Claim 8
Dependent Claim
38 words
The method of claim 1, wherein indicia corresponding to the local positions of the track are measured, and the measured values of the local track positions are transformed into said individual signals corresponding tO the local acceleration changes.
Claim 9
Dependent Claim
20 words
The method of claim 7, wherein said indicia are the radii of successive curves whose totality constitutes the track position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |