Patent US3940765A successfully refreshed from Google Patents.
US3940765A
Expired / Lapsed
US
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Arrangement for a passive responder for a position finding system
Assignee: Siemens AG
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Filing: 1974-05-09
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Granted: 1976-02-24
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Expires: 1994-05-09
Abstract
Abstract This invention relates in general to a passive responder of a position finding system including at least one microwave antenna and a resonator body. The resonator body is mounted adjacent the rail of a railroad track and is connected to a microwave antenna which points upwardly such that it receives radiation from a transmitter carried by the train. The radiation opening of the receiving antenna is adjacent the rail head and the antenna is covered with a cover member comprising dielectric material which comes into contact with the wheel as each wheel rolls past. The contact of the wheel with the dielectric cover assures that ice, snow, and other foreign material will be continuously cleared from the receiving antenna so as to assure optimum operation of the transponder.
Inventors
- 👤 Wilhelm Grafinger
- 👤 Lutz Knabe
- 👤 Guenter Engelmann
- 👤 Kurt Wagenlehner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:44
CPC Classifications
B; B61; B61L; B61L13/00; B61L13/04; B61L13/047
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
125 words
A passive responder for a position locating system for a wheeled railway vehicle moving on a track and in which said vehicle carries a microwave transmitter and receiver and transmits an interrogation signal to said passive responder the improvement wherein said responder includes a resonator member with several resonators which is mounted in the proximity of a rail of the track, a microwave antenna forming a part of said responder and pointed upwardly with its reciving and radiation opening in immediate proximity to the head of the rail, and a cover member of a dielectric material covering the upper end of said antenna and mounted so that it is engaged by the wheels of said vehicle as they roll by the responder on the rail.
Claim 2
Dependent Claim
125 words
A passive responder for a position locating system for a wheeled railway vehicle moving on a track and in which said vehicle carries a microwave transmitter and receiver and transmits an interrogation signal to said passive responder the improvement wherein said responder includes a resonator member with several resonators which is mounted in the proximity of a rail of the track, a microwave antenna forming a part of said responder and pointed upwardly with its reciving and radiation opening in immediate proximity to the head of the rail, and a cover member of a dielectric material covering the upper end of said antenna and mounted so that it is engaged by the wheels of said vehicle as they roll by the responder on the rail.
Claim 3
Dependent Claim
21 words
An arrangement according to claim 1, wherein said responder is mounted on the inside side of the rail between the tracks.
Claim 4
Dependent Claim
18 words
An arrangement according to claim 1, wherein said responder is mounted on the outside side of the rail.
Claim 5
Dependent Claim
16 words
An arrangement according to claim 1, wherein said cover member consists of a hard synthetic block.
Claim 6
Dependent Claim
17 words
An arrangement according to claim 1, wherein said cover member consists of a soft elastic synthetic block.
Claim 7
Dependent Claim
30 words
An arrangement according to claim 1, wherein said cover member consists of a soft elastic synthetic dome which has at least approximately the form of a segment of a sphere.
Claim 8
Dependent Claim
38 words
An arrangement according to claim 1, wherein said cover member consists of a combination of a soft elastic synthetic block and a soft elastic dome which has at least approximately the form of a segment of a sphere.
Claim 9
Dependent Claim
38 words
An arrangement according to claim 1, wherein said resonator member is spatially separated from the antenna and mounted below the base of the rail and is connected to the antenna by means of a flexible high frequency line.
Claim 10
Dependent Claim
33 words
An arrangement according to claim 1, wherein said resonator member is mounted in a position such that the respective longitudinal axes of the resonator member extend perpendicular to the plane of the track.
Claim 11
Dependent Claim
79 words
An arrangement according to claim 7 wherein said resonator member includes a wave guide with rectangular cross section and with an upper wall to which vertically extending resonators of the member are coupled, said antenna connected to said resonator member via at least one hollow bend which is formed to match high frequencies, and said resonator member mounted to the web of the rail with the longitudinal axis of the wave guide extending in the direction of the rails.
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) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |