GB1311540A - - Google Patents
Info
- Publication number
- GB1311540A GB1311540A GB1311540DA GB1311540A GB 1311540 A GB1311540 A GB 1311540A GB 1311540D A GB1311540D A GB 1311540DA GB 1311540 A GB1311540 A GB 1311540A
- Authority
- GB
- United Kingdom
- Prior art keywords
- train
- sync
- bits
- telegram
- parity check
- 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
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
- B61L3/16—Continuous control along the route
- B61L3/22—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation
- B61L3/225—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation using separate conductors along the route
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
1311540 Automatic train control BRITISH RAILWAYS BOARD 22 Oct 1971 [23 Oct 1970] 50521/70 Heading B7N [Also in Division G4] A repeatedly-transmitted digital "telegram" (code message) is checked on reception using a plurality of serially-connected shift registers each sufficient to hold the information bits of the telegram, logic circuit elements comparing the contents of corresponding stages in the different registers, disparity blocking passing of information beyond the checking equipment. Each telegram includes 10 sync bits, 16 information bits and 6 parity bits, and is sent via conductors laid along the track to an aerial on a train. On the train, a sync and parity check unit passes just the information bits to the series of shift registers each having 16 stages, corresponding stages being compared in 16 AND gates also receiving an enabling signal if synchronization and parity check out. Each AND gate feeds a relay or lamp via a divide-bytwo circuit and a transformer to provide failsafe operation. Thus the train speed can be controlled or the maximum permissible speed indicated. A sync and parity check unit may precede each shift register. Train to track communication is mentioned as an alternative use of the invention.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5052170 | 1970-10-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1311540A true GB1311540A (en) | 1973-03-28 |
Family
ID=10456206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1311540D Expired GB1311540A (en) | 1970-10-23 | 1970-10-23 |
Country Status (2)
Country | Link |
---|---|
CA (1) | CA946519A (en) |
GB (1) | GB1311540A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2322502A1 (en) * | 1975-08-25 | 1977-03-25 | Rca Corp | METER-TYPE REMOTE CONTROL RECEIVER INCLUDING A NOISE-INSENSITIVE SYSTEM |
-
1970
- 1970-10-23 GB GB1311540D patent/GB1311540A/en not_active Expired
-
1971
- 1971-10-22 CA CA125,869A patent/CA946519A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2322502A1 (en) * | 1975-08-25 | 1977-03-25 | Rca Corp | METER-TYPE REMOTE CONTROL RECEIVER INCLUDING A NOISE-INSENSITIVE SYSTEM |
Also Published As
Publication number | Publication date |
---|---|
CA946519A (en) | 1974-04-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |