GB1200120A - Improvements in or relating to fire alarms - Google Patents

Improvements in or relating to fire alarms

Info

Publication number
GB1200120A
GB1200120A GB59190/67A GB5919067A GB1200120A GB 1200120 A GB1200120 A GB 1200120A GB 59190/67 A GB59190/67 A GB 59190/67A GB 5919067 A GB5919067 A GB 5919067A GB 1200120 A GB1200120 A GB 1200120A
Authority
GB
United Kingdom
Prior art keywords
detector
fire
resistor
ionization chamber
feedback
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
GB59190/67A
Other languages
English (en)
Inventor
Andreas Scheidweiler
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 GB1200120A publication Critical patent/GB1200120A/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-Detection Mechanisms (AREA)
GB59190/67A 1966-12-29 1967-12-29 Improvements in or relating to fire alarms Expired GB1200120A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1875166A CH468683A (de) 1966-12-29 1966-12-29 Feuermelder mit einer elektrischen Rückkopplungsanordnung

Publications (1)

Publication Number Publication Date
GB1200120A true GB1200120A (en) 1970-07-29

Family

ID=4435069

Family Applications (1)

Application Number Title Priority Date Filing Date
GB59190/67A Expired GB1200120A (en) 1966-12-29 1967-12-29 Improvements in or relating to fire alarms

Country Status (7)

Country Link
US (1) US3559196A (enrdf_load_stackoverflow)
AT (1) AT278597B (enrdf_load_stackoverflow)
BE (1) BE707959A (enrdf_load_stackoverflow)
CH (1) CH468683A (enrdf_load_stackoverflow)
DK (1) DK122548B (enrdf_load_stackoverflow)
GB (1) GB1200120A (enrdf_load_stackoverflow)
SE (1) SE330659B (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946374A (en) * 1970-08-13 1976-03-23 Sci Systems, Inc. Rate-of-change combustion and contamination detection device
JPS4940290Y1 (enrdf_load_stackoverflow) * 1970-11-19 1974-11-05
US3866195A (en) * 1973-05-07 1975-02-11 Fire Alert Company Combustion product detector and method of calibrating
DE2327497C3 (de) * 1973-05-30 1981-12-24 Benno 5430 Wettingen Aargau Perren Melder für Widerstandsänderungen mit nachgeschalteter Alarmeinrichtung
US4109240A (en) * 1973-11-26 1978-08-22 Cerberus Ag. Ionization-type fire sensing system
DE2546970C3 (de) * 1975-10-20 1981-09-10 Preussag Ag Feuerschutz, 2060 Bad Oldesloe Ionisations-Rauchmelder
DE2707409C2 (de) * 1977-02-21 1985-02-21 Hartwig Dipl.-Ing. 2409 Scharbeutz Beyersdorf Ionisationsbrandmelder
DE2726186C3 (de) * 1977-06-10 1981-05-14 Pan Data Ab, Stockholm Elektrische Überwachungsvorrichtung
US7821412B2 (en) * 2006-09-15 2010-10-26 Applied Nanotech Holdings, Inc. Smoke detector
US9564045B2 (en) * 2014-04-14 2017-02-07 Stephen D. Ainsworth Alarm system testing device

Also Published As

Publication number Publication date
US3559196A (en) 1971-01-26
BE707959A (enrdf_load_stackoverflow) 1968-04-16
CH468683A (de) 1969-02-15
AT278597B (de) 1970-02-10
DE1566687B1 (de) 1971-04-01
DK122548B (da) 1972-03-13
SE330659B (enrdf_load_stackoverflow) 1970-11-23

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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