GB1341372A - Smoke detector - Google Patents

Smoke detector

Info

Publication number
GB1341372A
GB1341372A GB4831572A GB4831572A GB1341372A GB 1341372 A GB1341372 A GB 1341372A GB 4831572 A GB4831572 A GB 4831572A GB 4831572 A GB4831572 A GB 4831572A GB 1341372 A GB1341372 A GB 1341372A
Authority
GB
United Kingdom
Prior art keywords
wall
housing
cover
chamber
membrane
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
GB4831572A
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.)
Bevaknings AB Securitas
Original Assignee
Bevaknings AB Securitas
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 Bevaknings AB Securitas filed Critical Bevaknings AB Securitas
Publication of GB1341372A publication Critical patent/GB1341372A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
    • G01N27/64—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Fire-Detection Mechanisms (AREA)
GB4831572A 1971-10-20 1972-10-20 Smoke detector Expired GB1341372A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE13304/71A SE347377B (enrdf_load_stackoverflow) 1971-10-20 1971-10-20

Publications (1)

Publication Number Publication Date
GB1341372A true GB1341372A (en) 1973-12-19

Family

ID=20297181

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4831572A Expired GB1341372A (en) 1971-10-20 1972-10-20 Smoke detector

Country Status (8)

Country Link
US (1) US3838283A (enrdf_load_stackoverflow)
BE (1) BE790355A (enrdf_load_stackoverflow)
DE (1) DE2250820A1 (enrdf_load_stackoverflow)
FR (1) FR2175383A5 (enrdf_load_stackoverflow)
GB (1) GB1341372A (enrdf_load_stackoverflow)
NL (1) NL7214138A (enrdf_load_stackoverflow)
NO (1) NO126977B (enrdf_load_stackoverflow)
SE (1) SE347377B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245174A (en) 1978-04-24 1981-01-13 Isotec Industries Limited Dual ionization chamber
GB2240214A (en) * 1989-12-25 1991-07-24 Hochiki Co Ionization-type smoke sensor
GB2278719A (en) * 1993-05-17 1994-12-07 Kilsen Sa Ionisation smoke detector

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075487A (en) * 1976-05-14 1978-02-21 Patent Development & Management Company Ionization chamber assembly
DE2652970C3 (de) * 1976-11-22 1979-09-06 Hartwig Ing.(Grad.) 2409 Scharbeutz Beyersdorf Ionisations-Brandmelder
US4238679A (en) * 1978-12-07 1980-12-09 Conrac Corporation Dual-chamber ionization smoke detector assembly
FR2473201A1 (fr) * 1980-01-02 1981-07-10 Gamma Electronic Detecteur de fumees capacitif a faible source d'ionisation
DE9416314U1 (de) 1994-10-10 1994-12-01 Fritz Fuss Gmbh & Co, 72458 Albstadt Rauchmelder
DE19627620C1 (de) * 1996-07-09 1997-11-13 Bruker Saxonia Analytik Gmbh Elektroneneinfangdetektor
US20050218811A1 (en) * 2004-03-31 2005-10-06 Schulman Michael B Gas discharge lamp with high-energy vacuum ultraviolet emission
AU2005230450B2 (en) * 2004-03-31 2009-12-17 Msa Technology, Llc Photoionization detector
US7504962B2 (en) * 2005-11-22 2009-03-17 Joseph Stephen Smith Apparatus for enclosing a smoke detector
CN100414291C (zh) * 2006-03-17 2008-08-27 中国科学院安徽光学精密机械研究所 一种便携式光离子化检测器的电离室

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS446089Y1 (enrdf_load_stackoverflow) * 1966-03-30 1969-03-05
DE2029485B2 (de) * 1969-06-21 1971-11-25 Nittan Co. Ltd., Tokio Ionisations rauchfuehler
ZA704724B (en) * 1969-07-22 1971-03-31 Nittan Co Ltd Ionization smoke detector

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245174A (en) 1978-04-24 1981-01-13 Isotec Industries Limited Dual ionization chamber
GB2240214A (en) * 1989-12-25 1991-07-24 Hochiki Co Ionization-type smoke sensor
GB2240214B (en) * 1989-12-25 1994-08-24 Hochiki Co Ionization-type smoke sensor
GB2278719A (en) * 1993-05-17 1994-12-07 Kilsen Sa Ionisation smoke detector
ES2070748A2 (es) * 1993-05-17 1995-06-01 Kilsen Sa Detector ionico de humos.
GB2278719B (en) * 1993-05-17 1997-03-26 Kilsen Sa Ionic smoke detector

Also Published As

Publication number Publication date
DE2250820A1 (de) 1973-04-26
NO126977B (enrdf_load_stackoverflow) 1973-04-16
BE790355A (fr) 1973-02-15
SE347377B (enrdf_load_stackoverflow) 1972-07-31
US3838283A (en) 1974-09-24
NL7214138A (enrdf_load_stackoverflow) 1973-04-25
FR2175383A5 (enrdf_load_stackoverflow) 1973-10-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee