FR821346A - Communication device for railways - Google Patents
Communication device for railwaysInfo
- Publication number
- FR821346A FR821346A FR821346DA FR821346A FR 821346 A FR821346 A FR 821346A FR 821346D A FR821346D A FR 821346DA FR 821346 A FR821346 A FR 821346A
- Authority
- FR
- France
- Prior art keywords
- railways
- communication device
- communication
- 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
- 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
- B61L3/221—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation using track circuits
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US821346XA | 1936-05-02 | 1936-05-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR821346A true FR821346A (en) | 1937-12-02 |
Family
ID=1553586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR821346D Expired FR821346A (en) | 1936-05-02 | 1937-04-30 | Communication device for railways |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR821346A (en) |
-
1937
- 1937-04-30 FR FR821346D patent/FR821346A/en not_active Expired
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