IT1143096B - IMPROVEMENT IN OPTICAL-ELECTRONIC SMOKE DETECTOR DEVICES - Google Patents

IMPROVEMENT IN OPTICAL-ELECTRONIC SMOKE DETECTOR DEVICES

Info

Publication number
IT1143096B
IT1143096B IT48651/80A IT4865180A IT1143096B IT 1143096 B IT1143096 B IT 1143096B IT 48651/80 A IT48651/80 A IT 48651/80A IT 4865180 A IT4865180 A IT 4865180A IT 1143096 B IT1143096 B IT 1143096B
Authority
IT
Italy
Prior art keywords
improvement
optical
smoke detector
electronic smoke
detector devices
Prior art date
Application number
IT48651/80A
Other languages
Italian (it)
Other versions
IT8048651A0 (en
Inventor
John A Forss
Lee Tzuo-Chang
Richard G Schulze
Original Assignee
Honeywell 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
Priority claimed from US06/039,467 external-priority patent/US4230950A/en
Priority claimed from US06/045,025 external-priority patent/US4221485A/en
Application filed by Honeywell Inc filed Critical Honeywell Inc
Publication of IT8048651A0 publication Critical patent/IT8048651A0/en
Application granted granted Critical
Publication of IT1143096B publication Critical patent/IT1143096B/en

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
    • 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
IT48651/80A 1979-05-16 1980-05-12 IMPROVEMENT IN OPTICAL-ELECTRONIC SMOKE DETECTOR DEVICES IT1143096B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/039,467 US4230950A (en) 1979-05-16 1979-05-16 Electro-optic smoke detector
US06/045,025 US4221485A (en) 1979-06-04 1979-06-04 Optical smoke detector

Publications (2)

Publication Number Publication Date
IT8048651A0 IT8048651A0 (en) 1980-05-12
IT1143096B true IT1143096B (en) 1986-10-22

Family

ID=26716158

Family Applications (1)

Application Number Title Priority Date Filing Date
IT48651/80A IT1143096B (en) 1979-05-16 1980-05-12 IMPROVEMENT IN OPTICAL-ELECTRONIC SMOKE DETECTOR DEVICES

Country Status (5)

Country Link
CH (1) CH651410A5 (en)
DE (1) DE3018021A1 (en)
FR (1) FR2456529A1 (en)
IT (1) IT1143096B (en)
SE (1) SE8003547L (en)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE682869C (en) * 1929-02-24 1939-10-23 Zeiss Carl Fa Device for measuring the degree of turbidity of liquids
CH278998A (en) * 1949-08-22 1951-11-15 Loeschcke Hans Dr Prof Method for counting particles suspended in a transparent medium and measuring device for carrying out the method.
NL132814C (en) * 1963-07-24
CH417405A (en) * 1964-07-14 1966-07-15 Cerberus Ag Werk Fuer Elektron Device for the detection of aerosols in air
US3524707A (en) * 1967-08-14 1970-08-18 Julian E Hansen Sr Pulsating light source smoke detector
GB1285977A (en) * 1968-12-23 1972-08-16 Gam Rad Improved turbidimeter
US3713743A (en) * 1970-11-25 1973-01-30 Agricultural Control Syst Forward scatter optical turbidimeter apparatus
JPS5431833B2 (en) * 1972-12-28 1979-10-09
JPS5855446B2 (en) * 1975-07-15 1983-12-09 松下電工株式会社 Scattered light smoke detector
CH595113A5 (en) * 1976-03-18 1978-01-31 Cerberus Ag
US4121110A (en) * 1976-11-04 1978-10-17 Solomon Elias E Optically biased smoke detector

Also Published As

Publication number Publication date
FR2456529A1 (en) 1980-12-12
IT8048651A0 (en) 1980-05-12
DE3018021A1 (en) 1980-11-27
CH651410A5 (en) 1985-09-13
SE8003547L (en) 1980-11-17
DE3018021C2 (en) 1989-04-20

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970528