DE3464424D1 - Optical smoke detector - Google Patents

Optical smoke detector

Info

Publication number
DE3464424D1
DE3464424D1 DE8484111255T DE3464424T DE3464424D1 DE 3464424 D1 DE3464424 D1 DE 3464424D1 DE 8484111255 T DE8484111255 T DE 8484111255T DE 3464424 T DE3464424 T DE 3464424T DE 3464424 D1 DE3464424 D1 DE 3464424D1
Authority
DE
Germany
Prior art keywords
lobe
light source
light
opening
detector
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
DE8484111255T
Other languages
German (de)
Inventor
Peer Dr Ing Thilo
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to DE8484111255T priority Critical patent/DE3464424D1/en
Application granted granted Critical
Publication of DE3464424D1 publication Critical patent/DE3464424D1/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
    • G08B17/103—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
    • G08B17/107—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 for detecting light-scattering due to smoke
    • 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
    • G08B17/113—Constructional details

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

1. An optical smoke sensor comprising a light source (S) and a light detector (E) arranged at an acute angle (beta) in relation thereto, where the overlap zones of the transmitting lobe (SK) and the receiving lobe (EK) form a measurement zone (MR) in which smoke particles present produce a scattering of light to be received as reflected radiation, wherein the detector (E) is assigned at least one light source (S1, S2) in its direct vicinity, characterised in that a non-scattered light beam (SK1, SK2) which emanates from the light source emerges through an opening (O1, O2) in the housing (G) of the sensor (M), where the angle (alpha) of the transmitting lobe (SK) is at least sufficiently small to correspond to the outlet opening (O), and where the housing has no opening at the point to which the receiving lobe (EK) extends.
DE8484111255T 1983-09-23 1984-09-20 Optical smoke detector Expired DE3464424D1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8484111255T DE3464424D1 (en) 1983-09-23 1984-09-20 Optical smoke detector

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833334545 DE3334545A1 (en) 1983-09-23 1983-09-23 OPTICAL SMOKE DETECTOR
DE8484111255T DE3464424D1 (en) 1983-09-23 1984-09-20 Optical smoke detector

Publications (1)

Publication Number Publication Date
DE3464424D1 true DE3464424D1 (en) 1987-07-30

Family

ID=6209923

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19833334545 Withdrawn DE3334545A1 (en) 1983-09-23 1983-09-23 OPTICAL SMOKE DETECTOR
DE8484111255T Expired DE3464424D1 (en) 1983-09-23 1984-09-20 Optical smoke detector

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19833334545 Withdrawn DE3334545A1 (en) 1983-09-23 1983-09-23 OPTICAL SMOKE DETECTOR

Country Status (3)

Country Link
EP (1) EP0142672B1 (en)
AT (1) ATE28008T1 (en)
DE (2) DE3334545A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3831654A1 (en) * 1988-09-17 1990-03-22 Hartwig Beyersdorf OPTICAL SMOKE DETECTOR
DE4414166C1 (en) * 1994-04-22 1995-12-07 Lorenz Mesgeraetebau Method and device for measuring light scattering on particles
EP0821330B1 (en) * 1996-07-22 2002-09-04 Siemens Building Technologies AG Smoke detector
EP1017034B1 (en) * 1998-09-14 2003-08-27 Siemens Building Technologies AG Optical smoke detector according to the extinguish principle and method for compensating the temperature drift
EP0987663A1 (en) * 1998-09-14 2000-03-22 Siemens Building Technologies AG Optical smoke detector according to the extinguish principle and method for compensating the temperature drift
RU2450361C1 (en) * 2010-12-28 2012-05-10 Общество с ограниченной ответственностью "Группа компаний "РУБЕЖ" Optical electric fire-smoke detector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB729140A (en) * 1952-04-04 1955-05-04 Pyrene Co Ltd Improvements relating to smoke indicators
JPS5855446B2 (en) * 1975-07-15 1983-12-09 松下電工株式会社 Scattered light smoke detector
ZA763862B (en) * 1975-07-21 1977-05-25 Gen Signal Corp Photodiode smoke detector
GB1592475A (en) * 1977-09-06 1981-07-08 Cheung King Fung Smoke detectors
DE2951459C2 (en) * 1979-12-20 1984-03-29 Heimann Gmbh, 6200 Wiesbaden Optical arrangement for a smoke detector based on the light scattering principle

Also Published As

Publication number Publication date
EP0142672B1 (en) 1987-06-24
DE3334545A1 (en) 1985-04-04
ATE28008T1 (en) 1987-07-15
EP0142672A1 (en) 1985-05-29

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee