US3906492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for the surveillance of objects moving along a route
Assignee: Thales SA
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Filing: 1973-07-02
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Granted: 1975-09-16
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Expires: 1993-07-02
Abstract
Abstract A system for the surveillance of a route along which vehicles are moving, and which operates in real time, comprises radar equipment whose transmitter and receiver are each connected to a leak line acting as an antenna for respectively transmitting outgoing energy from the radar unit and conveying reflected energy back to the radar unit. These lines are mutually decoupled so that only the line connected to the receiver picks up the energy reflected by a moving object or a fixed obstacle situated on the surveyed route.
Inventors
- 👤 Jean-Raymond Narbaits-Jaureguy
- 👤 Henri Billottet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:37
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/02; B61L3/08; B61L3/12; B61L3/125; G; G01; G01S; G01S1/00; G01S1/02; G08; G08G; G08G1/00; G08G1/01
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
A system for the surveillance of objects moving along a route, comprising: a radar installation provided with a source of outgoing highfrequency signals, transmission means connected to said source for emitting said outgoing signals, reception means for signals reflected by extraneous objects on said route, and indicator means for reflected signals connected to said reception means; a metallic base extending along said route; elongate antenna means including two parallel and coextensive lines subject to leakage losses, said lines being supported alongside each other on said base, one of said lines having one end terminated in a first load matching its characteristic impedance and having its opposite end connected to said transmission means for radiating said outgoing signals, the other of said lines having one end terminated in a second load matching its characteristic impedance and having its opposite end connected to said reception means for picking up said reflected signals; and a metallic strip rising from said base between said lines for mutually decoupling same to prevent direct signal transmission therebetween.
Claim 2
Independent Claim
171 words
A system for the surveillance of objects moving along a route, comprising: a radar installation provided with a source of outgoing highfrequency signals, transmission means connected to said source for emitting said outgoing signals, reception means for signals reflected by extraneous objects on said route, and indicator means for reflected signals connected to said reception means; a metallic base extending along said route; elongate antenna means including two parallel and coextensive lines subject to leakage losses, said lines being supported alongside each other on said base, one of said lines having one end terminated in a first load matching its characteristic impedance and having its opposite end connected to said transmission means for radiating said outgoing signals, the other of said lines having one end terminated in a second load matching its characteristic impedance and having its opposite end connected to said reception means for picking up said reflected signals; and a metallic strip rising from said base between said lines for mutually decoupling same to prevent direct signal transmission therebetween.
Claim 3
Dependent Claim
55 words
A system as defined in claim 1 wherein said transmission means is connected to said one of said lines at one end of said antenna means proximal to said second load. said reception means being connected to said other of said lines at the opposite end of said antenna means proximal to said first load.
Claim 4
Dependent Claim
22 words
A system as defined in claim 2 wherein the propagation speeds of said lines for high-frequency signals substantially differ from each other.
Claim 5
Dependent Claim
30 words
A system as defined in claim 1 wherein each of said lines comprises at least one elongate conductor enveloped in a dielectric sheath resting against said base and said strip.
Claim 6
Independent Claim
181 words
A system for the surveillance of objects moving along a route, comprising: a radar installation provided with a source of outgoing high-frequency signals, transmission means connected to said source for emitting said outgoing signals, reception means for signals reflected by extraneous objects on said route, and indicator means for reflected signals connected to said reception means; a first and a second line parallel to and coextensive with each other and subject to leakage losses, said lines having substantially different propagation speeds for high-frequency signals, said first line having one end terminated in a first load matching its characteristic impedance and having its other end connected to said transmission means for radiating said outgoing signals, said second line having an end proximal to said other end of said first line terminated in a second load matching its characteristic impedance and having an opposite end proximal to said one end of said first line connected to said reception means for picking up said reflected signals; and elongated shield means interposed between said lines for mutually decoupling same to prevent direct signal transmission therebetween.
Claim 7
Independent Claim
181 words
A system for the surveillance of objects moving along a route, comprising: a radar installation provided with a source of outgoing high-frequency signals, transmission means connected to said source for emitting said outgoing signals, reception means for signals reflected by extraneous objects on said route, and indicator means for reflected signals connected to said reception means; a first and a second line parallel to and coextensive with each other and subject to leakage losses, said lines having substantially different propagation speeds for high-frequency signals, said first line having one end terminated in a first load matching its characteristic impedance and having its other end connected to said transmission means for radiating said outgoing signals, said second line having an end proximal to said other end of said first line terminated in a second load matching its characteristic impedance and having an opposite end proximal to said one end of said first line connected to said reception means for picking up said reflected signals; and elongated shield means interposed between said lines for mutually decoupling same to prevent direct signal transmission therebetween.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |