GB1434808A - Optical smoke detectors - Google Patents

Optical smoke detectors

Info

Publication number
GB1434808A
GB1434808A GB5268473A GB5268473A GB1434808A GB 1434808 A GB1434808 A GB 1434808A GB 5268473 A GB5268473 A GB 5268473A GB 5268473 A GB5268473 A GB 5268473A GB 1434808 A GB1434808 A GB 1434808A
Authority
GB
United Kingdom
Prior art keywords
cover
circuit board
side wall
passage
wall
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
GB5268473A
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.)
ELECTRO SINGAL LAB Inc
Original Assignee
ELECTRO SINGAL LAB Inc
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 ELECTRO SINGAL LAB Inc filed Critical ELECTRO SINGAL LAB Inc
Publication of GB1434808A publication Critical patent/GB1434808A/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)
  • Fire-Detection Mechanisms (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
GB5268473A 1973-07-24 1973-11-13 Optical smoke detectors Expired GB1434808A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US382058A US3863076A (en) 1973-07-24 1973-07-24 Optical smoke detector

Publications (1)

Publication Number Publication Date
GB1434808A true GB1434808A (en) 1976-05-05

Family

ID=23507370

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5268473A Expired GB1434808A (en) 1973-07-24 1973-11-13 Optical smoke detectors

Country Status (7)

Country Link
US (1) US3863076A (enrdf_load_stackoverflow)
JP (1) JPS5034872A (enrdf_load_stackoverflow)
CA (1) CA1022644A (enrdf_load_stackoverflow)
DE (1) DE2358706A1 (enrdf_load_stackoverflow)
FR (1) FR2239169A5 (enrdf_load_stackoverflow)
GB (1) GB1434808A (enrdf_load_stackoverflow)
IT (1) IT1000987B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000282A (en) * 1977-06-27 1979-01-04 Nittan Co Ltd Light scattering smoke detector
GB2137338A (en) * 1983-03-31 1984-10-03 Hochiki Co Scattered light type smoke detector

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985453A (en) * 1974-07-19 1976-10-12 Matsushita Electric Works, Ltd. Light scattering type smoke detector
JPS5229274A (en) * 1975-08-29 1977-03-04 Matsushita Electric Works Ltd Light scattering type smoke detector
US4053785A (en) * 1976-01-07 1977-10-11 General Signal Corporation Optical smoke detector with smoke effect simulating means
US4124298A (en) * 1977-03-14 1978-11-07 Electro Signal Lab, Inc. Optical smoke detector inlet screen
US4249082A (en) * 1977-09-20 1981-02-03 Cybernet Electronics Corporation Photoelectric smoke sensor box
JPS59182337A (ja) * 1983-03-31 1984-10-17 Matsushita Electric Works Ltd 煙検知器
USD283407S (en) 1984-03-09 1986-04-15 Pittway Corporation Smoke detector
USD284272S (en) 1984-08-09 1986-06-17 Laurence Chen Ionization chamber for a smoke detector
JPS63163698A (ja) * 1986-12-26 1988-07-07 ホーチキ株式会社 散乱光式煙感知器
US4904988A (en) * 1989-03-06 1990-02-27 Nesbit Charles E Toy with a smoke detector
NO312911B1 (no) 1994-12-22 2002-07-15 Budenheim Rud A Oetker Chemie Antikorrosjonspigment og anvendelse av dette
JP2010271894A (ja) * 2009-05-21 2010-12-02 Panasonic Electric Works Co Ltd 煙検知式警報器
US8933811B2 (en) * 2009-10-05 2015-01-13 Cavius Aps Smoke alarm
US9297753B2 (en) * 2011-08-29 2016-03-29 Fenwal Controls Of Japan, Ltd. Photoelectric smoke sensor
USD770929S1 (en) * 2014-06-26 2016-11-08 Life Safety Distribution Ag Optical block
DE102014019172B4 (de) 2014-12-17 2023-12-07 Elmos Semiconductor Se Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mit einem kompensierenden optischen Messsystem
DE102014019773B4 (de) 2014-12-17 2023-12-07 Elmos Semiconductor Se Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mittels des Displays eines Mobiltelefons

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537028A (en) * 1945-10-02 1951-01-09 C O Two Fire Equipment Co Smoke detector and signal
US2604597A (en) * 1949-02-03 1952-07-22 C O Two Fire Equipment Co Smoke detector
US3409885A (en) * 1964-03-26 1968-11-05 Guardian Industries Smoke detection apparatus
US3555532A (en) * 1968-10-29 1971-01-12 Graham Stuart Corp Vapor or particle detection device
DE2047997B2 (de) * 1970-09-30 1976-10-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektronische einzel-eingabetaste
US3723747A (en) * 1971-06-03 1973-03-27 Electro Signal Lab Photoelectric detector with compensating photocell

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000282A (en) * 1977-06-27 1979-01-04 Nittan Co Ltd Light scattering smoke detector
GB2000282B (en) * 1977-06-27 1982-01-20 Nittan Co Ltd Improvements in or relating to a light scattering smoke detector
GB2137338A (en) * 1983-03-31 1984-10-03 Hochiki Co Scattered light type smoke detector

Also Published As

Publication number Publication date
US3863076A (en) 1975-01-28
IT1000987B (it) 1976-04-10
DE2358706A1 (de) 1975-02-06
CA1022644A (en) 1977-12-13
JPS5034872A (enrdf_load_stackoverflow) 1975-04-03
FR2239169A5 (enrdf_load_stackoverflow) 1975-02-21

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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