US3740549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote signaling system for train control
Assignee: Bombardier Transportation Holdings USA Inc
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Filing: 1969-12-24
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Granted: 1973-06-19
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Expires: 1989-12-24
Abstract
Abstract A remote signaling system is described for the monitoring and control of one or more moving trains from a remote wayside location by means of a vehicle carried antenna and signal transmitter coupled with a track-side cable and designed to introduce a movement variable periodic phase shift into the coupled signals from the train back to the wayside located receiver to enable the desired train position monitoring function. The train carried antenna is magnetically coupled to this track-side cable arrangement such that undesired signal changes due to train vehicle rock and sway motion are minimized, and signal transmission difficulties introduced by the physical position variation of the track-side cable wires relative to the track path are minimized. The track-side cable comprises two closely spaced signal transmission lines each having a crossover at predetermined length intervals, with the physical crossover of each transmission line being equally spaced and substantially half-way between the adjacent physical crossovers of the other transmission line. An alternate embodiment employs a signal signal transmission line or cable having crossovers at predetermined intervals at the track-side. This track-side transmission line is driven by an oscillator. Two train carried antennae, spaced a predetermined longitudinal distance apart, receive a movement variable periodic phase shift signal to enable the desired position monitoring function.
Inventors
- 👤 Booth G Thorne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:37
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/16; B61L3/22; B61L3/225; B60; B60L; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
273 words
In a vehicle control system wherein a vehicle travels along a predetermined path, apparatus for producing a signal indicative of vehicle position, comprising: signal transmission means including an alternating current signal source operatively connected to a first inductive transmitter loop; signal receiving means including second and third inductive receiver loops forming separate receivinG channels, with said second and third receiver loops being substantially coextensive, elongated loops aligned with said path, said first transmitter loop being operated to couple with both the second and third receiver loops, with at least one of the second and third receiver loops being formed by first and second longitudinal conductor portions having a predetermined arrangement pattern comprising successive lateral transpositions of said first and second conductor portions at corresponding longitudinal intervals of said at least one of the second and third receiver loops, to inductively receive a signal from the first transmitter loop in alternately one and the other of opposite phase relationships as the first transmitter loop passes therealong; one of said signal transmission means and said signal receiving means being in fixed position relative to said vehicle path and the other being movable in position with travel of the vehicle; said first, second, and third inductive loops having predetermined cooperative physical arrangements in a direction aligned with said path such that the signals induced into the second and third loops are alternately in an in-phase and in an out-of-phase relationship to one another under travel of the vehicle along said path; and means for comparing the phase of signal induced into the second and third inductive loop to derive an output signal representative of vehicle position.
Claim 2
Dependent Claim
273 words
In a vehicle control system wherein a vehicle travels along a predetermined path, apparatus for producing a signal indicative of vehicle position, comprising: signal transmission means including an alternating current signal source operatively connected to a first inductive transmitter loop; signal receiving means including second and third inductive receiver loops forming separate receivinG channels, with said second and third receiver loops being substantially coextensive, elongated loops aligned with said path, said first transmitter loop being operated to couple with both the second and third receiver loops, with at least one of the second and third receiver loops being formed by first and second longitudinal conductor portions having a predetermined arrangement pattern comprising successive lateral transpositions of said first and second conductor portions at corresponding longitudinal intervals of said at least one of the second and third receiver loops, to inductively receive a signal from the first transmitter loop in alternately one and the other of opposite phase relationships as the first transmitter loop passes therealong; one of said signal transmission means and said signal receiving means being in fixed position relative to said vehicle path and the other being movable in position with travel of the vehicle; said first, second, and third inductive loops having predetermined cooperative physical arrangements in a direction aligned with said path such that the signals induced into the second and third loops are alternately in an in-phase and in an out-of-phase relationship to one another under travel of the vehicle along said path; and means for comparing the phase of signal induced into the second and third inductive loop to derive an output signal representative of vehicle position.
Claim 3
Dependent Claim
246 words
In a vehicle control system wherein a vehicle travels along a predetermined path, apparatus for producing a signal indicative of vehicle position, comprising: signal transmission means including an alternating current signal source operatively connected to a first inductive transmitter loop; signal receiving means including second and third inductive receiver loops forming separate receiving channels, and being operative to couple with said first transmitter loop, with said second and third receiver loops being coextensive elongated loops aligned with said path, said second and third receiver loops each being formed of a pair of longitudinal conductor portions successively laterally transposed at predetermined periodic intervals, with the periodic intervals of the second and third receiver loops being longitudinally displaced relative to one another to respectively receive signals which are alternately mutually in-phase and mutually out-of-phase under travel of the vehicle; one of said signal transmission means and said signal receiving means being in fixed position relative to said vehicle path and the other being movable in position with travel of the vehicle; said first, second, and third inductive loops having predetermined cooperative physical arrangements in a direction aligned with said path such that the signals induced into the second and third loop are alternately in an in-phase and in an out-of-phase relationship relative to one another under travel of the vehicle along said path; and means for comparing the phase of signal induced into the second and third inductive loop to derive an output signal representative of vehicle position.
Claim 4
Dependent Claim
246 words
In a vehicle control system wherein a vehicle travels along a predetermined path, apparatus for producing a signal indicative of vehicle position, comprising: signal transmission means including an alternating current signal source operatively connected to a first inductive transmitter loop; signal receiving means including second and third inductive receiver loops forming separate receiving channels, and being operative to couple with said first transmitter loop, with said second and third receiver loops being coextensive elongated loops aligned with said path, said second and third receiver loops each being formed of a pair of longitudinal conductor portions successively laterally transposed at predetermined periodic intervals, with the periodic intervals of the second and third receiver loops being longitudinally displaced relative to one another to respectively receive signals which are alternately mutually in-phase and mutually out-of-phase under travel of the vehicle; one of said signal transmission means and said signal receiving means being in fixed position relative to said vehicle path and the other being movable in position with travel of the vehicle; said first, second, and third inductive loops having predetermined cooperative physical arrangements in a direction aligned with said path such that the signals induced into the second and third loop are alternately in an in-phase and in an out-of-phase relationship relative to one another under travel of the vehicle along said path; and means for comparing the phase of signal induced into the second and third inductive loop to derive an output signal representative of vehicle position.
Claim 5
Dependent Claim
148 words
In a vehicle control system, wherein a vehicle travels along a vehicle travel path, apparatus for producing a signal indicative of said vehicle''s position along said vehicle travel path comprising: two two-wire transmission lines situated along said vehicle travel path, with each of said two two-wire transmission lines each having regularly recurrent line transpositions and being adjacent each other with a position shift relative to said recurrent line transpositions; signal transmission means located on said vehicle, including an inductive transmitter loop aligned relative to said two two-wire transmission lines for inducing signals therein that are alternately in an in-phase and in an out-of-phase relationship relative to one another as said vehicle travels along said vehicle travel path; and means for comparing the phase of the signals induced into said twO two-wire transmission lines, respectively, for deriving said signal indicative of said vehicle''s position along said vehicle travel path.
Claim 6
Dependent Claim
148 words
In a vehicle control system, wherein a vehicle travels along a vehicle travel path, apparatus for producing a signal indicative of said vehicle''s position along said vehicle travel path comprising: two two-wire transmission lines situated along said vehicle travel path, with each of said two two-wire transmission lines each having regularly recurrent line transpositions and being adjacent each other with a position shift relative to said recurrent line transpositions; signal transmission means located on said vehicle, including an inductive transmitter loop aligned relative to said two two-wire transmission lines for inducing signals therein that are alternately in an in-phase and in an out-of-phase relationship relative to one another as said vehicle travels along said vehicle travel path; and means for comparing the phase of the signals induced into said twO two-wire transmission lines, respectively, for deriving said signal indicative of said vehicle''s position along said vehicle travel path.
Claim 7
Dependent Claim
17 words
The combination claimed in claim 3, wherein the transposition interval of each two-wire transmission line is equal.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |