ZA718534B - An improvement in or relating to communication system - Google Patents

An improvement in or relating to communication system

Info

Publication number
ZA718534B
ZA718534B ZA718534A ZA718534A ZA718534B ZA 718534 B ZA718534 B ZA 718534B ZA 718534 A ZA718534 A ZA 718534A ZA 718534 A ZA718534 A ZA 718534A ZA 718534 B ZA718534 B ZA 718534B
Authority
ZA
South Africa
Prior art keywords
relating
improvement
communication system
communication
Prior art date
Application number
ZA718534A
Other languages
English (en)
Inventor
R Linfield
A Farstad
J Allen
L Ball
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
Publication of ZA718534B publication Critical patent/ZA718534B/xx

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)
ZA718534A 1971-01-13 1971-12-21 An improvement in or relating to communication system ZA718534B (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
ZA718534B true ZA718534B (en) 1972-09-27

Family

ID=22309114

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA718534A ZA718534B (en) 1971-01-13 1971-12-21 An improvement in or relating to communication system

Country Status (8)

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

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 (en) * 1988-05-02 1992-12-15 Kenneth E. Hjelmstad Electromagnetic fire warning system for underground mines
WO2007124538A1 (en) 2006-04-28 2007-11-08 Orica Explosives Technology Pty Ltd Methods of controlling components of blasting apparatuses, blasting apparatuses, and components thereof
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 (en) * 2009-06-03 2015-10-14 Marshall Radio Telemetry Inc SYSTEMS AND METHODS FOR COMMUNICATIONS THROUGH EARTH
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
CA941308A (en) 1974-02-05
FR2121778A1 (xx) 1972-08-25
US3740488A (en) 1973-06-19
FR2121778B1 (xx) 1974-11-08

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