GB1401146A - Fire alarm system with remote central station - Google Patents

Fire alarm system with remote central station

Info

Publication number
GB1401146A
GB1401146A GB3409473A GB3409473A GB1401146A GB 1401146 A GB1401146 A GB 1401146A GB 3409473 A GB3409473 A GB 3409473A GB 3409473 A GB3409473 A GB 3409473A GB 1401146 A GB1401146 A GB 1401146A
Authority
GB
United Kingdom
Prior art keywords
detector
voltage
line
transistor
current
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
GB3409473A
Other languages
English (en)
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.)
Cerberus AG
Original Assignee
Cerberus AG
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 Cerberus AG filed Critical Cerberus AG
Publication of GB1401146A publication Critical patent/GB1401146A/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
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire Alarms (AREA)
  • Alarm Systems (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Fire-Detection Mechanisms (AREA)
GB3409473A 1972-07-17 1973-07-17 Fire alarm system with remote central station Expired GB1401146A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1065472 1972-07-17

Publications (1)

Publication Number Publication Date
GB1401146A true GB1401146A (en) 1975-07-16

Family

ID=4365437

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3409473A Expired GB1401146A (en) 1972-07-17 1973-07-17 Fire alarm system with remote central station

Country Status (13)

Country Link
US (1) US3821734A (enrdf_load_stackoverflow)
JP (1) JPS5617704B2 (enrdf_load_stackoverflow)
AU (1) AU474604B2 (enrdf_load_stackoverflow)
CA (1) CA988224A (enrdf_load_stackoverflow)
CH (1) CH547531A (enrdf_load_stackoverflow)
DE (1) DE2328881C3 (enrdf_load_stackoverflow)
FI (1) FI56908C (enrdf_load_stackoverflow)
FR (1) FR2193225B1 (enrdf_load_stackoverflow)
GB (1) GB1401146A (enrdf_load_stackoverflow)
HK (1) HK55880A (enrdf_load_stackoverflow)
NO (1) NO137619C (enrdf_load_stackoverflow)
SE (1) SE390076B (enrdf_load_stackoverflow)
ZA (1) ZA734855B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143979A (en) * 1983-06-30 1985-02-20 Raychem Corp Method for detecting and obtaining information about changes in variables
US4573040A (en) * 1979-11-30 1986-02-25 Drexelbrook Engineering Company Fail-safe instrument system
US5015958A (en) 1983-06-30 1991-05-14 Raychem Corporation Elongate sensors comprising conductive polymers, and methods and apparatus using such sensors
US5235286A (en) 1985-06-12 1993-08-10 Raychem Corporation Method for detecting and obtaining information about changers in variables
US5382909A (en) 1983-06-30 1995-01-17 Raychem Corporation Method for detecting and obtaining information about changes in variables

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2707409C2 (de) * 1977-02-21 1985-02-21 Hartwig Dipl.-Ing. 2409 Scharbeutz Beyersdorf Ionisationsbrandmelder
US4191946A (en) * 1977-10-20 1980-03-04 Gonzalez Raymond J Warning apparatus with a line integrity supervisory circuit
JPS5831038B2 (ja) * 1977-12-26 1983-07-02 能美防災工業株式会社 火災感知器
DE2811891A1 (de) * 1978-03-18 1979-09-27 Merk Gmbh Telefonbau Fried Schaltungsanordnung zur ruhestromueberwachung von meldeleitungen
US4207558A (en) * 1978-04-03 1980-06-10 Pittway Corporation Interconnection circuit for a plurality of alarm units
USRE30620E (en) * 1978-07-03 1981-05-19 P. R. Mallory & Co. Inc. High output smoke and heat detector alarm system utilizing a piezoelectric transducer and a voltage doubling means
AU5026479A (en) * 1978-08-26 1980-03-06 Hochiki Corp. Fire sensing system
US4414539A (en) * 1978-12-22 1983-11-08 The Boeing Company Built-in passive fault detection circuitry for an aircraft's electrical/electronic systems
US4287515A (en) * 1979-04-27 1981-09-01 Baker Industries, Inc. Fire detection system with multiple output signals
JPS56162122A (en) 1980-05-16 1981-12-12 Canon Inc Electronic apparatus equipped with printing device
JPS6174187U (enrdf_load_stackoverflow) * 1984-10-16 1986-05-20
US5898369A (en) * 1996-01-18 1999-04-27 Godwin; Paul K. Communicating hazardous condition detector
AT501215B1 (de) * 2004-12-20 2008-05-15 Friedl Helmut Dipl Ing Überwachungseinrichtung
DE102005038602B4 (de) * 2005-08-16 2019-05-09 Robert Bosch Gmbh Sicherheitseinrichtung
JP6175235B2 (ja) * 2012-12-25 2017-08-02 能美防災株式会社 火災報知設備及びそれに利用する火災感知器及び終端装置
RU2717355C1 (ru) * 2019-07-24 2020-03-23 Общество С Ограниченной Ответственностью "Форносовское Научно-Производственное Предприятие "Гефест" Устройство коммутации исполнительных элементов пожарной автоматики
CN116087726B (zh) * 2023-04-11 2023-06-27 国网四川省电力公司电力科学研究院 一种火焰通道的临界击穿距离测量装置及测量方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3550120A (en) * 1968-12-09 1970-12-22 Honeywell Inc Control apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4573040A (en) * 1979-11-30 1986-02-25 Drexelbrook Engineering Company Fail-safe instrument system
GB2143979A (en) * 1983-06-30 1985-02-20 Raychem Corp Method for detecting and obtaining information about changes in variables
US5015958A (en) 1983-06-30 1991-05-14 Raychem Corporation Elongate sensors comprising conductive polymers, and methods and apparatus using such sensors
US5382909A (en) 1983-06-30 1995-01-17 Raychem Corporation Method for detecting and obtaining information about changes in variables
US5235286A (en) 1985-06-12 1993-08-10 Raychem Corporation Method for detecting and obtaining information about changers in variables

Also Published As

Publication number Publication date
FI56908B (fi) 1979-12-31
DE2328881C3 (de) 1982-03-18
FI56908C (fi) 1980-04-10
CH547531A (de) 1974-03-29
NO137619B (no) 1977-12-12
FR2193225B1 (enrdf_load_stackoverflow) 1979-01-26
HK55880A (en) 1980-10-10
JPS4970596A (enrdf_load_stackoverflow) 1974-07-08
FR2193225A1 (enrdf_load_stackoverflow) 1974-02-15
AU5798773A (en) 1975-01-16
ZA734855B (en) 1974-07-31
US3821734A (en) 1974-06-28
SE390076B (sv) 1976-11-29
DE2328881B2 (enrdf_load_stackoverflow) 1981-02-05
AU474604B2 (en) 1976-07-29
NO137619C (no) 1978-03-29
DE2328881A1 (de) 1974-01-31
CA988224A (en) 1976-04-27
JPS5617704B2 (enrdf_load_stackoverflow) 1981-04-23

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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