GB1490866A - Light responsive detectors - Google Patents

Light responsive detectors

Info

Publication number
GB1490866A
GB1490866A GB45706/74A GB4570674A GB1490866A GB 1490866 A GB1490866 A GB 1490866A GB 45706/74 A GB45706/74 A GB 45706/74A GB 4570674 A GB4570674 A GB 4570674A GB 1490866 A GB1490866 A GB 1490866A
Authority
GB
United Kingdom
Prior art keywords
pulse
detector
light
threshold circuit
flip
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
GB45706/74A
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.)
CHLORIDE BATTERIJEN BV
Original Assignee
CHLORIDE BATTERIJEN BV
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
Priority claimed from US449362A external-priority patent/US3917956A/en
Application filed by CHLORIDE BATTERIJEN BV filed Critical CHLORIDE BATTERIJEN BV
Publication of GB1490866A publication Critical patent/GB1490866A/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
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. 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
    • G08B17/103—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

Landscapes

  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
GB45706/74A 1973-11-26 1974-10-22 Light responsive detectors Expired GB1490866A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US41920673A 1973-11-26 1973-11-26
US449362A US3917956A (en) 1974-03-08 1974-03-08 Smoke detector

Publications (1)

Publication Number Publication Date
GB1490866A true GB1490866A (en) 1977-11-02

Family

ID=27024396

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45706/74A Expired GB1490866A (en) 1973-11-26 1974-10-22 Light responsive detectors

Country Status (11)

Country Link
JP (1) JPS50114275A (enrdf_load_stackoverflow)
BR (1) BR7408707D0 (enrdf_load_stackoverflow)
CA (1) CA1056931A (enrdf_load_stackoverflow)
CH (2) CH580848A5 (enrdf_load_stackoverflow)
CS (1) CS186786B2 (enrdf_load_stackoverflow)
DE (2) DE2462876C2 (enrdf_load_stackoverflow)
FR (1) FR2254024B3 (enrdf_load_stackoverflow)
GB (1) GB1490866A (enrdf_load_stackoverflow)
IL (1) IL45331A (enrdf_load_stackoverflow)
IN (1) IN143206B (enrdf_load_stackoverflow)
NL (1) NL7410079A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114401760A (zh) * 2019-05-23 2022-04-26 北门科技股份有限公司 用于气体再流通系统中的烟雾去除的系统和方法

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5354000A (en) * 1976-10-26 1978-05-16 Matsushita Electric Works Ltd Detection signal processing circuit of photoelectric type smoke detectors
US4125779A (en) * 1977-07-13 1978-11-14 Chloride, Incorporated Smoke detector
CH638331A5 (de) * 1979-02-22 1983-09-15 Cerberus Ag Rauchdetektor.
DE3063643D1 (en) * 1979-02-26 1983-07-14 Cerberus Ag Fire detector using pulsed radiation
BE881812A (nl) * 1979-12-17 1980-06-16 Cerberus Ag Meldingsstelsel
JPS5716956U (enrdf_load_stackoverflow) * 1980-06-30 1982-01-28
JPS6014398B2 (ja) * 1981-03-18 1985-04-12 ホーチキ株式会社 光電式煙感知器
EP0145189B1 (en) * 1983-10-21 1990-08-08 COLE, Martin Terence Improvements relating to smoke detection apparatus
JPS6151U (ja) * 1985-05-17 1986-01-06 京セラ株式会社 光電式煙検出報知装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH417405A (de) * 1964-07-14 1966-07-15 Cerberus Ag Werk Fuer Elektron Vorrichtung zur Feststellung von Aerosolen in Luft
US3382762A (en) * 1967-02-21 1968-05-14 Alfred W. Vasel Smoke detecting device
US3555532A (en) 1968-10-29 1971-01-12 Graham Stuart Corp Vapor or particle detection device
GB1278205A (en) * 1970-02-11 1972-06-21 Shorrock Develpoments Ltd Smoke detecting device
CH520990A (de) * 1970-12-21 1972-03-31 Cerberus Ag Rauchdetektor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114401760A (zh) * 2019-05-23 2022-04-26 北门科技股份有限公司 用于气体再流通系统中的烟雾去除的系统和方法

Also Published As

Publication number Publication date
IL45331A0 (en) 1974-10-22
DE2448195C2 (de) 1984-08-23
FR2254024A1 (enrdf_load_stackoverflow) 1975-07-04
CH599645A5 (enrdf_load_stackoverflow) 1978-05-31
IN143206B (enrdf_load_stackoverflow) 1977-10-15
JPS50114275A (enrdf_load_stackoverflow) 1975-09-08
CH580848A5 (enrdf_load_stackoverflow) 1976-10-15
DE2448195A1 (de) 1975-05-28
FR2254024B3 (enrdf_load_stackoverflow) 1979-02-02
BR7408707D0 (pt) 1975-08-26
AU7330074A (en) 1976-03-18
IL45331A (en) 1977-12-30
DE2462876C2 (de) 1983-06-09
NL7410079A (nl) 1975-05-28
CS186786B2 (en) 1978-12-29
CA1056931A (en) 1979-06-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee