GB2200270B - Apparatus for providing two-way communication in underground facilities - Google Patents

Apparatus for providing two-way communication in underground facilities

Info

Publication number: GB2200270B
Authority: GB; United Kingdom
Prior art keywords: providing; way communication; underground facilities; underground; facilities
Prior art date: 1987-01-22
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 - Fee Related

Application number

GB8729449A

Other versions

GB2200270A (en

GB8729449D0 (en

Inventor

Antti Berg

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.)

Outokumpu Oyj

Original Assignee

Outokumpu Oyj

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.)

1987-01-22

Filing date

1987-12-17

Publication date

1991-06-26

1987-12-17 Application filed by Outokumpu Oyj filed Critical Outokumpu Oyj

1988-02-03 Publication of GB8729449D0 publication Critical patent/GB8729449D0/en

1988-07-27 Publication of GB2200270A publication Critical patent/GB2200270A/en

1991-06-26 Application granted granted Critical

1991-06-26 Publication of GB2200270B publication Critical patent/GB2200270B/en

2007-12-17 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Transceivers (AREA)
Bidirectional Digital Transmission (AREA)
Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Radio Transmission System (AREA)
Transmitters (AREA)

GB8729449A 1987-01-22 1987-12-17 Apparatus for providing two-way communication in underground facilities Expired - Fee Related GB2200270B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FI870286A FI77131C (en)	1987-01-22	1987-01-22	Device for providing bi-directional communication in underground spaces

Publications (3)

Publication Number	Publication Date
GB8729449D0 GB8729449D0 (en)	1988-02-03
GB2200270A GB2200270A (en)	1988-07-27
GB2200270B true GB2200270B (en)	1991-06-26

Family

ID=8523819

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB8729449A Expired - Fee Related GB2200270B (en)	1987-01-22	1987-12-17	Apparatus for providing two-way communication in underground facilities

Country Status (5)

Country	Link
JP (1)	JPH07118680B2 (en)
DE (1)	DE3741866C2 (en)
FI (1)	FI77131C (en)
FR (1)	FR2610156B1 (en)
GB (1)	GB2200270B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3942320A1 (en) *	1989-10-10	1991-04-11	Wk Elektronik Gmbh	Communication system esp. for salt mine - uses single frequency phase locked loop radio system at base stations connected by wire to central station

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2083977A (en) *	1980-08-26	1982-03-31	Standard Telephones Cables Ltd	Single channel duplex radio system
GB2109197A (en) *	1981-10-13	1983-05-25	Standard Telephones Cables Ltd	Radio system
GB2126845A (en) *	1982-07-27	1984-03-28	Arf Products	Radio communication systems for underground mines

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3825829A (en) *	1973-01-29	1974-07-23	Motorola Inc	Radio system employing simultaneously triggered pulse repeaters
JPS599041B2 (en) *	1976-10-05	1984-02-29	三菱電機株式会社	thin film mirror
JPS54123819A (en) *	1978-03-17	1979-09-26	Kiyoshi Takizawa	Under soil or water signal transmitter
JPS5726942A (en) *	1980-07-25	1982-02-13	Tokyo Gas Co Ltd	Data transmission system
FR2538645B1 (en) *	1982-12-28	1986-04-11	Thomson Csf	METHOD AND DEVICE FOR INTERPOLATING SPEECH IN A DIGITAL SPEECH TRANSMISSION SYSTEM

1987
- 1987-01-22 FI FI870286A patent/FI77131C/en not_active IP Right Cessation
- 1987-12-10 DE DE3741866A patent/DE3741866C2/en not_active Expired - Fee Related
- 1987-12-15 JP JP62315437A patent/JPH07118680B2/en not_active Expired - Lifetime
- 1987-12-17 GB GB8729449A patent/GB2200270B/en not_active Expired - Fee Related
1988
- 1988-01-20 FR FR888800580A patent/FR2610156B1/en not_active Expired - Lifetime

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2083977A (en) *	1980-08-26	1982-03-31	Standard Telephones Cables Ltd	Single channel duplex radio system
GB2109197A (en) *	1981-10-13	1983-05-25	Standard Telephones Cables Ltd	Radio system
GB2126845A (en) *	1982-07-27	1984-03-28	Arf Products	Radio communication systems for underground mines

Also Published As

Publication number	Publication date
JPH07118680B2 (en)	1995-12-18
GB2200270A (en)	1988-07-27
GB8729449D0 (en)	1988-02-03
FI870286A0 (en)	1987-01-22
JPS63194425A (en)	1988-08-11
DE3741866A1 (en)	1988-08-04
DE3741866C2 (en)	1997-04-03
FI870286L (en)	1988-07-23
FR2610156B1 (en)	1994-06-10
FI77131B (en)	1988-09-30
FR2610156A1 (en)	1988-07-29
FI77131C (en)	1989-01-10

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Legal Events

Date	Code	Title	Description
1998-08-05	PCNP	Patent ceased through non-payment of renewal fee	Effective date: 19971217