GB855549A - Improvements in railway track-circuits signalling systems - Google Patents
Improvements in railway track-circuits signalling systemsInfo
- Publication number
- GB855549A GB855549A GB1673657A GB1673657A GB855549A GB 855549 A GB855549 A GB 855549A GB 1673657 A GB1673657 A GB 1673657A GB 1673657 A GB1673657 A GB 1673657A GB 855549 A GB855549 A GB 855549A
- Authority
- GB
- United Kingdom
- Prior art keywords
- track
- circuit
- section
- rails
- short
- 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 abstract 4
- 239000004020 conductor Substances 0.000 abstract 3
- 239000003990 capacitor Substances 0.000 abstract 2
- 230000000694 effects Effects 0.000 abstract 2
- 241000132092 Aster Species 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000002452 interceptive effect Effects 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
- B61L23/08—Control, warning or like safety means along the route or between vehicles or trains for controlling traffic in one direction only
- B61L23/14—Control, warning or like safety means along the route or between vehicles or trains for controlling traffic in one direction only automatically operated
- B61L23/16—Track circuits specially adapted for section blocking
- B61L23/166—Track circuits specially adapted for section blocking using alternating current
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
855,549. Railway track circuit signalling systems. COMPTEURS ET MOTEURS ASTER. May 27, 1957, No. 16736/57. Class 105. In a railway signalling system employing the track rails for the transmission of signalling current, the ends of a track circuit are connected respectively to a generating device and a receiving device tuned to the same frequency and to respective resonant circuits of the parallel or " wave-trap " type tuned to said frequency and each comprising at least one capacitor and an inductance comprised by a portion of the track. Thus a track-circuit section A without insulated joints, Fig. 10, is supplied by a generator 31 feeding an oscillatng circuit 2 comprised by a short portion 5 of track and a condenser 4 forming a " wave-trap " type circuit short-circuiting the rails at the operating frequency and isolating it from the adjacent track section C. In a similar manner the circuit 3 of capacitor 8 and portion 9 of the track isolates the track section A from section B. A receiver 32 is connected across the circuit 3. Short-circuiting cross-conductors 7 and 10 are connected across the rails 5 and 9, respectively. Entry of a train axle detunes the oscillating circuit and de-excites the receiver. The shortcircuiting cross-conductor instead of being perpendicular to the rails 1 (when so disposed the presence of an axle aligned therewith is without effect) may be disposed obliquely, Fig. 3, or in effect obliquely, Figs. 6-8 (not shown), and Fig. 5, which shows a disposition permitting tamping of the ballast without interfering with the short-circuiting conductor. For track circuit sections of considerable length the section is divided into a plurality of track circuits as in Fig. 10 with inter-circuit relay amplifier stages (Fig. 11, not shown).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1673657A GB855549A (en) | 1957-05-27 | 1957-05-27 | Improvements in railway track-circuits signalling systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1673657A GB855549A (en) | 1957-05-27 | 1957-05-27 | Improvements in railway track-circuits signalling systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB855549A true GB855549A (en) | 1960-12-07 |
Family
ID=10082735
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1673657A Expired GB855549A (en) | 1957-05-27 | 1957-05-27 | Improvements in railway track-circuits signalling systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB855549A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3479502A (en) * | 1967-06-30 | 1969-11-18 | Gen Electric | Rail vehicle detection system |
US3489892A (en) * | 1967-04-24 | 1970-01-13 | Gen Electric | Termination circuit for a rail vehicle detection system |
US3526378A (en) * | 1967-08-23 | 1970-09-01 | Westinghouse Electric Corp | Signaling system for determining the presence of a train vehicle |
-
1957
- 1957-05-27 GB GB1673657A patent/GB855549A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3489892A (en) * | 1967-04-24 | 1970-01-13 | Gen Electric | Termination circuit for a rail vehicle detection system |
US3479502A (en) * | 1967-06-30 | 1969-11-18 | Gen Electric | Rail vehicle detection system |
US3526378A (en) * | 1967-08-23 | 1970-09-01 | Westinghouse Electric Corp | Signaling system for determining the presence of a train vehicle |
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