GB2146819B - Bidirectional, interactive communication system - Google Patents

Bidirectional, interactive communication system

Info

Publication number
GB2146819B
GB2146819B GB08426372A GB8426372A GB2146819B GB 2146819 B GB2146819 B GB 2146819B GB 08426372 A GB08426372 A GB 08426372A GB 8426372 A GB8426372 A GB 8426372A GB 2146819 B GB2146819 B GB 2146819B
Authority
GB
United Kingdom
Prior art keywords
bidirectional
communication system
interactive communication
interactive
communication
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
GB08426372A
Other versions
GB2146819A (en
GB8426372D0 (en
Inventor
John Milton Wynne
William Robert Vogt
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.)
Baker Industries Inc
Original Assignee
Baker Industries Inc
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
Priority claimed from US06/243,401 external-priority patent/US4394655A/en
Priority claimed from US06/345,909 external-priority patent/US4470047A/en
Application filed by Baker Industries Inc filed Critical Baker Industries Inc
Publication of GB8426372D0 publication Critical patent/GB8426372D0/en
Publication of GB2146819A publication Critical patent/GB2146819A/en
Application granted granted Critical
Publication of GB2146819B publication Critical patent/GB2146819B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/04—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop
GB08426372A 1981-03-13 1982-03-05 Bidirectional, interactive communication system Expired GB2146819B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/243,401 US4394655A (en) 1981-03-13 1981-03-13 Bidirectional, interactive fire detection system
US06/345,909 US4470047A (en) 1982-02-04 1982-02-04 Bidirectional, interactive fire detection system

Publications (3)

Publication Number Publication Date
GB8426372D0 GB8426372D0 (en) 1984-11-21
GB2146819A GB2146819A (en) 1985-04-24
GB2146819B true GB2146819B (en) 1985-10-23

Family

ID=26935826

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8206485A Expired GB2098766B (en) 1981-03-13 1982-03-05 Bidirectional interactive fire detection system
GB08426372A Expired GB2146819B (en) 1981-03-13 1982-03-05 Bidirectional, interactive communication system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8206485A Expired GB2098766B (en) 1981-03-13 1982-03-05 Bidirectional interactive fire detection system

Country Status (5)

Country Link
CA (1) CA1178678A (en)
CH (2) CH660927A5 (en)
DE (2) DE3249787C2 (en)
FR (1) FR2501880B1 (en)
GB (2) GB2098766B (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO162317C (en) * 1983-05-19 1992-02-06 Hochiki Co FIRE ALARM INSTALLATIONS
JPS60117939A (en) * 1983-11-30 1985-06-25 Matsushita Electric Works Ltd Information transmission system
DE3411129A1 (en) * 1984-03-26 1985-10-03 Fritz Fuss Kg, 7470 Albstadt CIRCUIT ARRANGEMENT FOR A HAZARD ALARM SYSTEM
GB2173618B (en) * 1985-04-12 1988-09-14 Emi Ltd Alarm monitoring installation
DE3622800A1 (en) * 1985-07-26 1987-01-29 Mitec Moderne Ind Gmbh Measuring arrangement with a multiplicity of measuring units
DE3614692A1 (en) * 1986-04-30 1987-11-05 Nixdorf Computer Ag DANGER REPORTING SYSTEM
JPS6324394A (en) * 1986-07-17 1988-02-01 ニツタン株式会社 Environment abnormality alarm equipment
FR2636157A1 (en) * 1988-09-08 1990-03-09 Hugon Emile FIRE ALARM DETECTOR ADDRESS AND PROGRAMMING CENTRAL
DE4036639A1 (en) * 1990-11-16 1992-05-21 Esser Sicherheitstechnik METHOD FOR DETERMINING THE CONFIGURATION OF THE DETECTORS OF A DANGER DETECTION SYSTEM AND FOR DETERMINING DETECTORS SUITABLE FOR THE SYSTEM CONFIGURATION
DE29510494U1 (en) * 1995-06-28 1995-08-31 Siemens Ag System of smoke detector and evaluation device
WO2000072252A1 (en) * 1999-05-21 2000-11-30 Infineon Technologies Ag Method for preventing the unauthorized use of chip cards
DE10000412A1 (en) * 2000-01-07 2001-07-26 Kremser Peter Fa Smoke detector for fire alarm system has switching device for timed activation or de-activation of smoke detector or its alarm circuit
US6791453B1 (en) 2000-08-11 2004-09-14 Walter Kidde Portable Equipment, Inc. Communication protocol for interconnected hazardous condition detectors, and system employing same
CN113990023B (en) * 2021-10-26 2023-01-24 无锡商业职业技术学院 Self-calibration and compensation circuit and method for photoelectric smoke detector

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297008B (en) * 1967-01-11 1969-06-04 Siemens Ag Signaling system with detectors connected in parallel in a two-wire loop
DE1812505C3 (en) * 1968-11-27 1980-01-10 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Telecontrol system with multiple use of a transmission channel
DE2147022A1 (en) * 1971-09-21 1973-04-05 Licentia Gmbh CIRCUIT ARRANGEMENT FOR ACHIEVING A GREATER SENSITIVITY IN THE CASE OF A NOISE DETECTION SYSTEM WITH FLUCTUATING NOISE LEVELS
DE2533330C3 (en) * 1975-07-25 1981-08-13 Siemens AG, 1000 Berlin und 8000 München Method and device for the transmission of measured values in a fire alarm system
GB1556061A (en) * 1975-08-28 1979-11-21 Sumitomo Chemical Co Monitor and alarm apparatus in loop line system
DE2713640A1 (en) * 1977-03-28 1978-10-12 Kraftwerk Union Ag PROCEDURE FOR MONITORING A PLANT AND ARRANGEMENT FOR IMPLEMENTING THE PROCEDURE
US4321592A (en) * 1978-05-30 1982-03-23 American District Telegraph Company Multiple sensor intrusion detection system
DE2836760C2 (en) * 1978-08-23 1983-11-17 Dr. Alfred Ristow GmbH & Co, 7500 Karlsruhe Electronic remote monitoring system
DE2946169C2 (en) * 1979-11-15 1986-12-11 Brown, Boveri & Cie Ag, 6800 Mannheim Method for determining the status of certain alarm transmitters in a surveillance system

Also Published As

Publication number Publication date
GB2098766A (en) 1982-11-24
GB2146819A (en) 1985-04-24
DE3249787C2 (en) 1988-06-01
CH660926A5 (en) 1987-05-29
GB8426372D0 (en) 1984-11-21
DE3207993A1 (en) 1983-03-03
FR2501880A1 (en) 1982-09-17
DE3207993C2 (en) 1989-05-18
CH660927A5 (en) 1987-05-29
CA1178678A (en) 1984-11-27
FR2501880B1 (en) 1985-12-20
GB2098766B (en) 1985-07-17

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19990305