FI61769C - Optisk branddetektor - Google Patents

Optisk branddetektor Download PDF

Info

Publication number
FI61769C
FI61769C FI770982A FI770982A FI61769C FI 61769 C FI61769 C FI 61769C FI 770982 A FI770982 A FI 770982A FI 770982 A FI770982 A FI 770982A FI 61769 C FI61769 C FI 61769C
Authority
FI
Finland
Prior art keywords
radiation
detector
optical
sensing element
path length
Prior art date
Application number
FI770982A
Other languages
English (en)
Swedish (sv)
Other versions
FI770982A (fi
FI61769B (fi
Inventor
Erik Gustaf Lindgren
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of FI770982A publication Critical patent/FI770982A/fi
Application granted granted Critical
Publication of FI61769B publication Critical patent/FI61769B/fi
Publication of FI61769C publication Critical patent/FI61769C/fi

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
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device

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)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
FI770982A 1976-04-15 1977-03-29 Optisk branddetektor FI61769C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7604502 1976-04-15
SE7604502A SE7604502L (sv) 1976-04-15 1976-04-15 Optisk branddetektor

Publications (3)

Publication Number Publication Date
FI770982A FI770982A (fi) 1977-10-16
FI61769B FI61769B (fi) 1982-05-31
FI61769C true FI61769C (fi) 1982-09-10

Family

ID=20327615

Family Applications (1)

Application Number Title Priority Date Filing Date
FI770982A FI61769C (fi) 1976-04-15 1977-03-29 Optisk branddetektor

Country Status (14)

Country Link
US (1) US4119949A (fi)
AU (1) AU499326B2 (fi)
BE (1) BE853380A (fi)
CA (1) CA1082336A (fi)
CH (1) CH613064A5 (fi)
DE (1) DE2714130A1 (fi)
DK (1) DK166177A (fi)
FI (1) FI61769C (fi)
FR (1) FR2366653A1 (fi)
GB (1) GB1527965A (fi)
IT (1) IT1077786B (fi)
NL (1) NL7704154A (fi)
NO (1) NO138306C (fi)
SE (1) SE7604502L (fi)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE395554B (sv) * 1976-09-01 1977-08-15 Ericsson Telefon Ab L M Optisk branddetektor
US4242669A (en) * 1979-05-04 1980-12-30 B. A. Security Systems Limited Passive infrared intruder detection system
US4306230A (en) * 1979-12-10 1981-12-15 Honeywell Inc. Self-checking photoelectric smoke detector
SE450176B (sv) * 1981-05-19 1987-06-09 Cerberus Ag Optisk branddetektor med forlengd stralveg innefattande en ljuskella med tva ljusalstrande enheter med olika vaglengd, vilka aktiveras omvexlande med varandra
US4560874A (en) * 1981-06-02 1985-12-24 Santa Barbara Research Center Reference channel for sensing optical contamination
FR2574200B1 (fr) * 1984-11-30 1987-01-23 Labo Electronique Physique Dispositif de detection d'intrus muni d'un dispositif d'antimasquage
JPH0765963B2 (ja) * 1986-04-07 1995-07-19 ホーチキ株式会社 減光式煙感知器
FI83696B (fi) * 1987-01-27 1991-04-30 Halton Oy Foerfarande foer reglering av ventilation.
DE19502521A1 (de) * 1995-01-27 1996-08-01 Abb Patent Gmbh Passiv-Infrarot-Melder mit einer Optik, die von einem Strahlungsobjekt emittierte Wärmestrahlung auf einen Infrarotsensor fokussiert
GB2319604A (en) * 1996-11-25 1998-05-27 Kidde Fire Protection Ltd Smoke and particle detector
AUPQ553800A0 (en) 2000-02-10 2000-03-02 Cole, Martin Terence Improvements relating to smoke detectors particularily duct monitored smoke detectors
NL1023679C2 (nl) * 2003-06-17 2004-12-20 Tno Lichtemitterende diode.
AU2004286360A1 (en) 2003-10-23 2005-05-12 Terence Cole Martin Improvement(s) related to particle monitors and method(s) therefor
GB2421788A (en) * 2004-12-21 2006-07-05 Rolls Royce Plc Fire warning system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1036996A (fr) * 1951-05-11 1953-09-14 Siderurgie Fse Inst Rech Pyromètre optique
GB1327231A (en) * 1970-01-07 1973-08-15 Nat Res Dev Fire detecting apparatus
US3643093A (en) * 1970-05-25 1972-02-15 Mc Graw Edison Co Ultraviolet detector system
SE335080B (fi) * 1970-07-24 1971-05-10 Ericsson Telefon Ab L M
DE2108707A1 (de) * 1971-02-24 1972-09-07 Portscht R Rauchdetektor nach dem Streulichtprinzip bei zwei Wellenlängen
GB1405615A (en) * 1972-08-11 1975-09-10 Chubb Fire Security Ltd Fire alarms
US3846772A (en) * 1972-08-11 1974-11-05 Chubb Fire Security Ltd Fire detector responsive to amplitude modulation of a pulsed em beam
US3799672A (en) * 1972-09-15 1974-03-26 Us Health Education & Welfare Oximeter for monitoring oxygen saturation in blood
CH565421A5 (fi) * 1974-05-10 1975-08-15 Cerberus Ag

Also Published As

Publication number Publication date
NO138306B (no) 1978-05-02
DE2714130C2 (fi) 1987-12-17
DE2714130A1 (de) 1977-10-27
AU2348577A (en) 1978-09-28
CA1082336A (en) 1980-07-22
CH613064A5 (fi) 1979-08-31
SE7604502L (sv) 1977-10-16
NO138306C (no) 1978-08-16
DK166177A (da) 1977-10-16
BE853380A (fr) 1977-08-01
GB1527965A (en) 1978-10-11
FI770982A (fi) 1977-10-16
FR2366653A1 (fr) 1978-04-28
IT1077786B (it) 1985-05-04
FR2366653B1 (fi) 1982-10-29
SE396831B (sv) 1977-10-03
NO771312L (no) 1977-10-18
AU499326B2 (en) 1979-04-12
US4119949A (en) 1978-10-10
NL7704154A (nl) 1977-10-18
FI61769B (fi) 1982-05-31

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Legal Events

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MM Patent lapsed

Owner name: CERBERUS AG