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
Application number
Priority date (The priority date 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 date listed.)
Publication of BE562952A publication Critical patent/BE562952A/xx

Links

Classifications

    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (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)
BE562952D 1957-03-04 BE562952A (ko)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1168800T 1957-03-04

Publications (1)

Publication Number Publication Date
BE562952A true BE562952A (ko)

Family

ID=9656224

Family Applications (1)

Application Number Title Priority Date Filing Date
BE562952D BE562952A (ko) 1957-03-04

Country Status (3)

Country Link
BE (1) BE562952A (ko)
FR (1) FR1168800A (ko)
GB (1) GB851917A (ko)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
FR1168800A (fr) 1958-12-16
GB851917A (en) 1960-10-19

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