GB1382257A - Communication system - Google Patents

Communication system

Info

Publication number
GB1382257A
GB1382257A GB6070071A GB6070071A GB1382257A GB 1382257 A GB1382257 A GB 1382257A GB 6070071 A GB6070071 A GB 6070071A GB 6070071 A GB6070071 A GB 6070071A GB 1382257 A GB1382257 A GB 1382257A
Authority
GB
United Kingdom
Prior art keywords
antenna
loop
amplifier
audio
antennas
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
GB6070071A
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
Publication of GB1382257A publication Critical patent/GB1382257A/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)

Abstract

1382257 Audible signalling apparatus WESTINGHOUSE ELECTRIC CORP 30 Dec 1971 [13 Jan 1971] 60700/71 Heading G4F [Also in Division H4] For use in a voice communication system transmitting an audio signal through the earth, e.g. between the surface and trapped miners and vice versa, a receiver comprises a loop antenna, an audio amplifier, and an output transducer producing an audible signal; the loop antenna has an output voltage increasing linearly with frequency up to a self-resonant frequency which is above the band of frequencies being transmitted. The transmitter may include an audio frequency power amplifier with a preamplifier and a microphone, and one or more antennas, with a multiple-tapped transformer forming a coupling and matching network between the amplifier and the antenna(s). The antenna may be a long wire earthed at its ends or a large loop. A receiver may be mounted on each miner's helmet, the loop antenna comprising a number of turns of wire about a ferrite core. The system may also be used for transmitting messages to vehicle drivers using a buried long wire antenna and loop antennas on the vehicles.
GB6070071A 1971-01-13 1971-12-30 Communication system Expired GB1382257A (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
GB1382257A true GB1382257A (en) 1975-01-29

Family

ID=22309114

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6070071A Expired GB1382257A (en) 1971-01-13 1971-12-30 Communication system

Country Status (8)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163029A (en) * 1984-08-06 1986-02-12 Peter James Raynor Inductive communication system
GB2185364A (en) * 1985-12-13 1987-07-15 Terence Henry Leather Communication system
GB2220823A (en) * 1988-05-02 1990-01-17 Kenneth Elroy Hjelmstad Electromagnetic warning system
GB2563872A (en) * 2017-06-28 2019-01-02 Kirintec Ltd Communications system

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543766B1 (en) * 1983-03-28 1985-07-19 Inst Francais Du Petrole METHOD OF TRANSMITTING A SIGNAL WITHOUT AN ELECTRICAL LINK THROUGH A CONDUCTIVE WALL, FOR example THE SHELL OF A VESSEL, AND DEVICE FOR IMPLEMENTING SAME
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
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
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
AU2007246164B2 (en) 2006-04-28 2012-12-20 Orica Australia Pty Ltd Methods of controlling components of blasting apparatuses, blasting apparatuses, and components thereof
ES2330286B1 (en) * 2007-07-26 2010-09-21 Universidad De Zaragoza METHOD AND DEVICE FOR TRANSMISSION AND AUDIO RECEPTION FOR BIDIRECTIONAL COMMUNICATIONS BY CURRENT INJECTION.
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 through-the-earth communications

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 (en) * 1956-07-21 1957-09-12 Siemens Ag Movable microphone arrangement with a microphone amplifier which, in particular, forms a structural unit with the microphone
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

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163029A (en) * 1984-08-06 1986-02-12 Peter James Raynor Inductive communication system
GB2185364A (en) * 1985-12-13 1987-07-15 Terence Henry Leather Communication system
GB2185364B (en) * 1985-12-13 1990-05-16 Terence Henry Leather Communication system
GB2220823A (en) * 1988-05-02 1990-01-17 Kenneth Elroy Hjelmstad Electromagnetic warning system
AU618088B2 (en) * 1988-05-02 1991-12-12 Us Department Of Interior, Bureau Of Mines Electromagnetic fire warning system for underground mines
GB2563872A (en) * 2017-06-28 2019-01-02 Kirintec Ltd Communications system
US10978803B2 (en) 2017-06-28 2021-04-13 Kirintec Limited Communications system
GB2563872B (en) * 2017-06-28 2022-06-15 Kirintec Ltd Communications system

Also Published As

Publication number Publication date
DE2200784A1 (en) 1972-07-20
US3740488A (en) 1973-06-19
AU3736171A (en) 1973-06-28
ZA718534B (en) 1972-09-27
BE777931A (en) 1972-07-12
FR2121778B1 (en) 1974-11-08
CA941308A (en) 1974-02-05
FR2121778A1 (en) 1972-08-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee