CA941308A - Inductive loop through-the-earth communication system - Google Patents

Inductive loop through-the-earth communication system

Info

Publication number
CA941308A
CA941308A CA125,475A CA125475A CA941308A CA 941308 A CA941308 A CA 941308A CA 125475 A CA125475 A CA 125475A CA 941308 A CA941308 A CA 941308A
Authority
CA
Canada
Prior art keywords
communication system
inductive loop
earth communication
earth
inductive
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
Application number
CA125,475A
Other languages
English (en)
Other versions
CA125475S (en
Inventor
Robert F. Linfield
James W. Allen
Arnold J. Farstad
Lawrence Ball
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Application granted granted Critical
Publication of CA941308A publication Critical patent/CA941308A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H04B5/26—Inductive coupling using coils
    • H04B5/266—One coil at each side, e.g. with primary and secondary coils

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Details Of Aerials (AREA)
  • Near-Field Transmission Systems (AREA)
  • Transmitters (AREA)
CA125,475A 1971-01-13 1971-10-19 Inductive loop through-the-earth communication system Expired CA941308A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10603471A 1971-01-13 1971-01-13

Publications (1)

Publication Number Publication Date
CA941308A true CA941308A (en) 1974-02-05

Family

ID=22309114

Family Applications (1)

Application Number Title Priority Date Filing Date
CA125,475A Expired CA941308A (en) 1971-01-13 1971-10-19 Inductive loop through-the-earth communication system

Country Status (8)

Country Link
US (1) US3740488A (fr)
AU (1) AU3736171A (fr)
BE (1) BE777931A (fr)
CA (1) CA941308A (fr)
DE (1) DE2200784A1 (fr)
FR (1) FR2121778B1 (fr)
GB (1) GB1382257A (fr)
ZA (1) ZA718534B (fr)

Families Citing this family (16)

* 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
US4652857A (en) * 1983-04-29 1987-03-24 Meiksin Zvi H Method and apparatus for transmitting wide-bandwidth frequency signals from mines and other power restricted environments
GB2163029B (en) * 1984-08-06 1987-11-18 Peter James Raynor Inductive communication system
GB8530772D0 (en) * 1985-12-13 1986-01-22 Gradwell Paul Stephen Communication system
US5003576A (en) * 1987-07-24 1991-03-26 Richard J. Helferich Analog/digital voice storage cellular telephone
USRE34976E (en) * 1987-07-24 1995-06-20 Richard J. Helferich Analog/digital voice storage cellular telephone
US4905003A (en) * 1987-07-24 1990-02-27 Richard J. Helferich Analog/digital data storage system
USRE37618E1 (en) * 1987-07-24 2002-04-02 Richard J. Helferich Analog/digital data storage system
US4864301A (en) * 1987-07-24 1989-09-05 Richard J. Helferich Variable speed transmission recording and retrieval of data
CA1311527C (fr) * 1988-05-02 1992-12-15 Kenneth E. Hjelmstad Systeme d'alarme-incendie electromagnetique pour mine souterraine
WO2007124538A1 (fr) 2006-04-28 2007-11-08 Orica Explosives Technology Pty Ltd Procédés de commande de composants d'appareils de tir, appareils de tir et composants de ceux-ci
ES2330286B1 (es) * 2007-07-26 2010-09-21 Universidad De Zaragoza Metodo y dispositivo de transmision y recepcion de audio para comunicaciones bidireccionales mediante inyeccion de corriente.
US8270912B2 (en) * 2007-12-12 2012-09-18 Broadcom Corporation Method and system for a transformer in an integrated circuit package
US8198714B2 (en) * 2008-03-28 2012-06-12 Broadcom Corporation Method and system for configuring a transformer embedded in a multi-layer integrated circuit (IC) package
EP2438698A4 (fr) * 2009-06-03 2015-10-14 Marshall Radio Telemetry Inc Systèmes et procédés de communications par la terre
GB2563872B (en) 2017-06-28 2022-06-15 Kirintec Ltd Communications system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2853557A (en) * 1955-01-28 1958-09-23 Dictograph Products Co Inc Sound distribution system
US2980793A (en) * 1956-06-11 1961-04-18 Electronic Safety Engineering Restricted range radio transmitting system
DE1015485B (de) * 1956-07-21 1957-09-12 Siemens Ag Bewegliche Mikrophonanordnung mit einem Mikrophonverstaerker, der insbesondere mit dem Mikrophon eine Baueinheit bildet
US3323063A (en) * 1964-08-07 1967-05-30 Theodore Granik System for re-diffusion of received radio signals
GB1031994A (en) * 1965-01-22 1966-06-08 John Davis & Son Derby Ltd Improvements in inductive signalling systems for mines, tunnels and similar situations
US3470474A (en) * 1966-12-23 1969-09-30 Donald E Bilger Underground radio communication system for highways
US3495209A (en) * 1968-11-13 1970-02-10 Marguerite Curtice Underwater communications system

Also Published As

Publication number Publication date
AU3736171A (en) 1973-06-28
BE777931A (fr) 1972-07-12
GB1382257A (en) 1975-01-29
DE2200784A1 (de) 1972-07-20
FR2121778A1 (fr) 1972-08-25
US3740488A (en) 1973-06-19
FR2121778B1 (fr) 1974-11-08
ZA718534B (en) 1972-09-27

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