GB1336670A - Track circuit apparatus for a railway - Google Patents
Track circuit apparatus for a railwayInfo
- Publication number
- GB1336670A GB1336670A GB1309871*[A GB1309871A GB1336670A GB 1336670 A GB1336670 A GB 1336670A GB 1309871 A GB1309871 A GB 1309871A GB 1336670 A GB1336670 A GB 1336670A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- transmitter
- signal
- track circuit
- centre
- 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
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
1336670 Continuous rail track circuit GENERAL SIGNAL CORP 4 May 1971 [4 May 1970] 13098/71 Heading B7N A continuous-rail, alternating-current, track circuit comprises a shunt ST terminating the circuit at each of its ends, a transmitter 10 centre feeding the circuit, second and third transmitters 12 each feeding the circuit at one of its ends, a diode 13 at each end of the circuit for mixing the signal from the centre feed transmitter 10 and that from the adjacent transmitter 12 and a detector 11 at each end of the circuit tuned to respond to one of the beat signals produced by the mixer. As described the centre feed transmitter has an output signal of 200 Hz which can be shunted by a train in the mid portion R1 of the circuit and the end transmitters 12 have a frequency of 2 KHz and supply an output signal which can be shunted by a train in the end portion R2 of the circuit. Both signals must be present to produce the 1À8 KHz beat signal to which the detectors 11 respond.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US3423670A | 1970-05-04 | 1970-05-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1336670A true GB1336670A (en) | 1973-11-07 |
Family
ID=21875135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1309871*[A Expired GB1336670A (en) | 1970-05-04 | 1971-05-04 | Track circuit apparatus for a railway |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3670161A (en) |
| BR (1) | BR7102691D0 (en) |
| CA (1) | CA938369A (en) |
| DE (1) | DE2121972A1 (en) |
| FR (1) | FR2091200A5 (en) |
| GB (1) | GB1336670A (en) |
| NL (1) | NL7106099A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3819933A (en) * | 1972-12-08 | 1974-06-25 | Westinghouse Air Brake Co | Detector track circuit for railroad crossings |
| US4304377A (en) * | 1977-06-08 | 1981-12-08 | Compagnie De Signaux Et D'entreprises Electriques | Electrical block separating joints for railway signaling systems |
| CS217737B1 (en) * | 1980-04-04 | 1983-01-28 | Oldrich Poupe | Connection of the railway circuit with plural signalling sources |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2193102A (en) * | 1938-03-19 | 1940-03-12 | Rca Corp | Dictograph |
-
1970
- 1970-05-04 US US34236A patent/US3670161A/en not_active Expired - Lifetime
-
1971
- 1971-04-01 CA CA109375A patent/CA938369A/en not_active Expired
- 1971-05-04 NL NL7106099A patent/NL7106099A/xx unknown
- 1971-05-04 BR BR2691/71A patent/BR7102691D0/en unknown
- 1971-05-04 FR FR7116087A patent/FR2091200A5/fr not_active Expired
- 1971-05-04 GB GB1309871*[A patent/GB1336670A/en not_active Expired
- 1971-05-04 DE DE19712121972 patent/DE2121972A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NL7106099A (en) | 1971-11-08 |
| BR7102691D0 (en) | 1973-04-10 |
| CA938369A (en) | 1973-12-11 |
| DE2121972A1 (en) | 1971-11-25 |
| FR2091200A5 (en) | 1972-01-14 |
| US3670161A (en) | 1972-06-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PE20 | Patent expired after termination of 20 years |