BE562952A - - Google Patents
Info
- Publication number
- BE562952A BE562952A BE562952DA BE562952A BE 562952 A BE562952 A BE 562952A BE 562952D A BE562952D A BE 562952DA BE 562952 A BE562952 A BE 562952A
- Authority
- BE
- Belgium
Links
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/04—Arrangements for transmitting signals characterised by the use of a wireless electrical link using magnetically coupled devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
- H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Polyesters Or Polycarbonates (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1168800T | 1957-03-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE562952A true BE562952A (de) |
Family
ID=9656224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE562952D BE562952A (de) | 1957-03-04 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE562952A (de) |
| FR (1) | FR1168800A (de) |
| GB (1) | GB851917A (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2543766B1 (fr) * | 1983-03-28 | 1985-07-19 | Inst Francais Du Petrole | Procede de transmission de signal sans liaison electrique au travers d'une paroi conductrice, la coque d'un navire par exemple, et dispositif pour sa mise en oeuvre |
| IT1227525B (it) * | 1988-12-06 | 1991-04-12 | Sacofgas Spa | Procedimento e apparecchiatura perfezionati per la trasmissione di misure attraverso un tubo metallico |
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0
- BE BE562952D patent/BE562952A/xx unknown
-
1957
- 1957-03-04 FR FR1168800D patent/FR1168800A/fr not_active Expired
- 1957-12-09 GB GB38202/57A patent/GB851917A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB851917A (en) | 1960-10-19 |
| FR1168800A (fr) | 1958-12-16 |