GB1326885A - Railway signalling apparatus and systems - Google Patents
Railway signalling apparatus and systemsInfo
- Publication number
- GB1326885A GB1326885A GB523971A GB1326885DA GB1326885A GB 1326885 A GB1326885 A GB 1326885A GB 523971 A GB523971 A GB 523971A GB 1326885D A GB1326885D A GB 1326885DA GB 1326885 A GB1326885 A GB 1326885A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rails
- rail
- circuit
- track
- receiver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000011664 signaling Effects 0.000 title 1
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/18—Railway track circuits
- B61L1/181—Details
- B61L1/187—Use of alternating current
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
1326885 Track circuit GEC-GENERAL SIGNAL Ltd 22 Feb 1972 [23 Feb 1971] 5239/71 Heading B7N A track circuit for continuous rail track comprises a transmitter 14 supplying an output at predetermined frequency to the track rails 10, 12, and a receiver 22 tuned to the predetermined frequency coupled to the rails at an end of the circuit to respond to both the inter rail voltage and the current in at least one of the rails. The coupling can be by a single coil 20 inductively coupled to the rail 10 and to a lead 18 which connects impedence 16 across the rails. Until a shorting axle 26 reaches the receive position the fall off in the inter-rail voltage component of the signal applied to the receiver due to the approach of the shorting axle is compensated by the increase in the rai current component of the signal. The circuit may be end or centre fed by the transmitter 14, adjacent circuits being fed at different frequencies. Both impedance leads and both rails may be coupled to the receiver, Fig. 2 (not shown), or the coupling to the rail 10 and lead 18 can be by separate coils which are connected in series.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB523971 | 1971-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1326885A true GB1326885A (en) | 1973-08-15 |
Family
ID=9792332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB523971A Expired GB1326885A (en) | 1971-02-23 | 1971-02-23 | Railway signalling apparatus and systems |
Country Status (4)
| Country | Link |
|---|---|
| AU (1) | AU463306B2 (en) |
| GB (1) | GB1326885A (en) |
| NL (1) | NL7202017A (en) |
| ZA (1) | ZA72991B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2951124A1 (en) * | 1979-12-19 | 1981-07-02 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | ELECTRICAL ISOLATING FOR AC-POWERED TRACK CIRCUITS IN RAILWAYS |
| US4304377A (en) * | 1977-06-08 | 1981-12-08 | Compagnie De Signaux Et D'entreprises Electriques | Electrical block separating joints for railway signaling systems |
-
1971
- 1971-02-23 GB GB523971A patent/GB1326885A/en not_active Expired
-
1972
- 1972-02-15 ZA ZA720991A patent/ZA72991B/en unknown
- 1972-02-16 NL NL7202017A patent/NL7202017A/xx not_active Application Discontinuation
- 1972-02-18 AU AU39134/72A patent/AU463306B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4304377A (en) * | 1977-06-08 | 1981-12-08 | Compagnie De Signaux Et D'entreprises Electriques | Electrical block separating joints for railway signaling systems |
| DE2951124A1 (en) * | 1979-12-19 | 1981-07-02 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | ELECTRICAL ISOLATING FOR AC-POWERED TRACK CIRCUITS IN RAILWAYS |
Also Published As
| Publication number | Publication date |
|---|---|
| NL7202017A (en) | 1972-08-25 |
| ZA72991B (en) | 1972-10-25 |
| AU3913472A (en) | 1973-08-23 |
| AU463306B2 (en) | 1975-07-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |