GB1419137A - Signal transmission systems - Google Patents

Signal transmission systems

Info

Publication number
GB1419137A
GB1419137A GB1160373A GB1160373A GB1419137A GB 1419137 A GB1419137 A GB 1419137A GB 1160373 A GB1160373 A GB 1160373A GB 1160373 A GB1160373 A GB 1160373A GB 1419137 A GB1419137 A GB 1419137A
Authority
GB
United Kingdom
Prior art keywords
line
central station
messages
local
station
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
GB1160373A
Other languages
English (en)
Inventor
L R Isheden
A E Sandlin
C A Hagland
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB1419137A publication Critical patent/GB1419137A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
    • G08B26/001—Alarm systems in which substations are interrogated in succession by a central station with individual interrogation of substations connected in parallel
    • G08B26/003—Alarm systems in which substations are interrogated in succession by a central station with individual interrogation of substations connected in parallel replying the identity and the state of the sensor
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
GB1160373A 1972-03-15 1973-03-09 Signal transmission systems Expired GB1419137A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE327772A SE374970B (fi) 1972-03-15 1972-03-15

Publications (1)

Publication Number Publication Date
GB1419137A true GB1419137A (en) 1975-12-24

Family

ID=20261764

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1160373A Expired GB1419137A (en) 1972-03-15 1973-03-09 Signal transmission systems

Country Status (6)

Country Link
BR (1) BR7301814D0 (fi)
FR (1) FR2176004B1 (fi)
GB (1) GB1419137A (fi)
IT (1) IT981362B (fi)
NO (1) NO132448C (fi)
SE (1) SE374970B (fi)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173618A (en) * 1985-04-12 1986-10-15 Emi Ltd Alarm monitoring installation
GB2261286A (en) * 1981-04-03 1993-05-12 Thomson Csf Test device for a group of receivers

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54118199A (en) * 1978-03-07 1979-09-13 Hochiki Co Information transmitter
CH651688A5 (de) * 1980-06-23 1985-09-30 Cerberus Ag Verfahren zur uebertragung von messwerten in einer brandmeldeanlage und einrichtung zur durchfuehrung des verfahrens.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1264135A (fr) * 1959-06-19 1961-06-19 Int Standard Electric Corp Système de signalisation électrique
FR1389164A (fr) * 1963-03-04 1965-02-12 Perfectionnements apportés aux installations de surveillance de postes éloignés à partir d'un poste central
US3601806A (en) * 1969-06-23 1971-08-24 North American Rockwell Digital time multiplexed bidirectional communications system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261286A (en) * 1981-04-03 1993-05-12 Thomson Csf Test device for a group of receivers
GB2261286B (en) * 1981-04-03 1993-09-29 Thomson Csf Test device for a group of receivers
GB2173618A (en) * 1985-04-12 1986-10-15 Emi Ltd Alarm monitoring installation

Also Published As

Publication number Publication date
BR7301814D0 (pt) 1974-07-11
NO132448B (fi) 1975-08-04
FR2176004A1 (fi) 1973-10-26
SE374970B (fi) 1975-03-24
IT981362B (it) 1974-10-10
NO132448C (fi) 1975-11-12
FR2176004B1 (fi) 1976-09-10

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee