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
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/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive loop type
    • H04B5/266—
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 (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)

Families Citing this family (16)

* 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
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
USRE34976E (en) * 1987-07-24 1995-06-20 Richard J. Helferich Analog/digital voice storage cellular telephone
US5003576A (en) * 1987-07-24 1991-03-26 Richard J. Helferich Analog/digital voice storage cellular telephone
US4864301A (en) * 1987-07-24 1989-09-05 Richard J. Helferich Variable speed transmission recording and retrieval of data
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
CA1311527C (en) * 1988-05-02 1992-12-15 Kenneth E. Hjelmstad Electromagnetic fire warning system for underground mines
CA2646299C (en) 2006-04-28 2014-12-02 Orica Explosives Technology 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
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 (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

Also Published As

Publication number Publication date
AU3736171A (en) 1973-06-28
CA941308A (en) 1974-02-05
DE2200784A1 (en) 1972-07-20
BE777931A (en) 1972-07-12
FR2121778A1 (en) 1972-08-25
GB1382257A (en) 1975-01-29
US3740488A (en) 1973-06-19
FR2121778B1 (en) 1974-11-08

Similar Documents

Publication Publication Date Title
ZA727375B (en) Improvements in or relating to digital communication systems
ZA718534B (en) An improvement in or relating to communication system
ZA723181B (en) Improvements in or relating to shaving devices
ZA72472B (en) Train communication system
ZA747283B (en) Improvements in or relating to data transmission system
AU4361572A (en) Improvements in or relating to oculometers
AU462327B2 (en) Improvements in or relating to carburetters
AU462326B2 (en) Improvements in or relating to communication systems
MTP716B (en) Idydroponic system
HK8379A (en) Improvements in or relating to thienobenzazepines
ZA724422B (en) Improvements in or relating to data transmission systems
ZA727358B (en) An improvement in or relating to mooring system
ZA733563B (en) Improvements in or relating to limited radiation communication system
ZA723068B (en) Improvements in or relating to wellpoints
ZA72848B (en) Improvements in or relating to data transmission
ZA72937B (en) Skid-control system
ZA713269B (en) Improvements in or relating to communication system
AU462040B2 (en) Improvements in or relating to programme-controlled data communication systems
ZA722285B (en) Improvements in or relating to data transmission systems
ZA728824B (en) Improvements in or relating to telephone systems
AU478468B2 (en) Improvements in or relating to communication systems
AU472724B2 (en) Improvements in or relating to location apparatus
ZA725290B (en) Improvements in or relating to telecommunications systems
AU461135B2 (en) Improvements in or relating to viners
ZA728823B (en) Improvements in or relating to telephone systems