IT1000974B - OPTICAL SMOKE DETECTOR WITH LIGHT DISPERSION TEST DEVICE - Google Patents

OPTICAL SMOKE DETECTOR WITH LIGHT DISPERSION TEST DEVICE

Info

Publication number: IT1000974B
Authority: IT; Italy
Prior art keywords: test device; smoke detector; light dispersion; dispersion test; optical smoke
Prior art date: 1973-07-25

Application number

IT9693/73A

Other languages

Italian (it)

Inventor

A Marsoochi

Original Assignee

Electro Signal Lab

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.)

1973-07-25

Filing date

1973-11-23

Publication date

1976-04-10

1973-11-23 Application filed by Electro Signal Lab filed Critical Electro Signal Lab

1976-04-10 Application granted granted Critical

1976-04-10 Publication of IT1000974B publication Critical patent/IT1000974B/en

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
- 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
- G01N21/4785—Standardising light scatter apparatus; Standards therefor
- 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
- G08B17/11—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

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)

IT9693/73A 1973-07-25 1973-11-23 OPTICAL SMOKE DETECTOR WITH LIGHT DISPERSION TEST DEVICE IT1000974B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US382521A US3868184A (en)	1973-07-25	1973-07-25	Optical smoke detector with light scattering test device

Publications (1)

Publication Number	Publication Date
IT1000974B true IT1000974B (en)	1976-04-10

Family

ID=23509319

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT9693/73A IT1000974B (en)	1973-07-25	1973-11-23	OPTICAL SMOKE DETECTOR WITH LIGHT DISPERSION TEST DEVICE

Country Status (6)

Country	Link
US (1)	US3868184A (en)
JP (1)	JPS5711013B2 (en)
CA (1)	CA1014637A (en)
DE (1)	DE2355784C2 (en)
FR (1)	FR2239168A5 (en)
IT (1)	IT1000974B (en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS50134172A (en) *	1974-04-17	1975-10-24
US3985453A (en) *	1974-07-19	1976-10-12	Matsushita Electric Works, Ltd.	Light scattering type smoke detector
US4021792A (en) *	1975-06-23	1977-05-03	Wellen Industries	Smoke alarm
US4053785A (en) *	1976-01-07	1977-10-11	General Signal Corporation	Optical smoke detector with smoke effect simulating means
JPS52141682A (en) *	1976-05-20	1977-11-26	Matsushita Electric Works Ltd	Sensitivity tester of photoelectric sensor
JPS533881A (en) *	1976-07-01	1978-01-13	Matsushita Electric Works Ltd	Sensitivity checking method for scattered light type smoke detector
US4099178A (en) *	1977-04-07	1978-07-04	Emdeko International, Inc.	Test means for light responsive smoke detector
US4166698A (en) *	1977-06-10	1979-09-04	American District Telegraph Company	Secondary light testing in optical smoke detectors
US4216377A (en) *	1977-06-27	1980-08-05	Nittan Company, Limited	Light scattering smoke detector
JPS5427672U (en) *	1977-07-25	1979-02-23
US4249082A (en) *	1977-09-20	1981-02-03	Cybernet Electronics Corporation	Photoelectric smoke sensor box
CH621640A5 (en) *	1977-11-21	1981-02-13	Cerberus Ag
US4144459A (en) *	1977-11-29	1979-03-13	Chloride Incorporated	Smoke detector with test means for simulating a predetermined percentage of smoke
US4144458A (en) *	1977-11-29	1979-03-13	Chloride Incorporated	Smoke detector with test means for simulating a predetermined concentration of smoke
SU873041A1 (en) *	1978-01-24	1981-10-15	Предприятие П/Я А-7555	Photoelectric transducer
US4360270A (en) *	1981-02-17	1982-11-23	Jeck Richard K	Calibration and testing device for optical, single particle, size spectrometers
CH656474A5 (en) *	1981-11-11	1986-06-30	Cerberus Ag	SMOKE DETECTOR.
JPS58170550U (en) *	1982-05-10	1983-11-14	ホーチキ株式会社	photoelectric smoke detector
US5523743A (en) *	1995-04-13	1996-06-04	Digital Security Controls Ltd.	Self-diagnostic smoke detector
TW566634U (en) *	2002-05-13	2003-12-11	Prec Instr Developement Ct Nat	Sensitivity adjustment device of photoelectric smoke detector
US8232884B2 (en) *	2009-04-24	2012-07-31	Gentex Corporation	Carbon monoxide and smoke detectors having distinct alarm indications and a test button that indicates improper operation
US8836532B2 (en)	2009-07-16	2014-09-16	Gentex Corporation	Notification appliance and method thereof
DE102009054141A1 (en)	2009-11-13	2011-05-19	Job Lizenz Gmbh & Co Kg	Method for verifying proper function of smoke detector in inner room of building, involves comparing output signal with reference output signal, and outputting error signal, when output signal falls below reference output signal
USD770929S1 (en) *	2014-06-26	2016-11-08	Life Safety Distribution Ag	Optical block
CN106407514B (en) *	2016-08-31	2020-06-05	合肥科斯孚安全科技有限公司	Double-light-path fire smoke detection smoke chamber optimization design method
EP4592669B1 (en) *	2024-01-23	2025-12-31	Endress+Hauser SICK GmbH+Co. KG	OPTO-MECHANICAL ANALYST DEVICE FOR DETERMINING FINE DUST IN A MEASURING GAS

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2920525A (en) *	1956-08-13	1960-01-12	Arthur V Appel	Apparatus for automatically counting and sizing airborne particles
GB923885A (en) *	1958-10-30	1963-04-18	Courtaulds Ltd	Nephelometers
DE1115477B (en) *	1959-08-12	1961-10-19	Lentia Gmbh	Stationary, industrial aerosol measuring device
US3234846A (en) *	1959-11-18	1966-02-15	Standard Oil Co	Continuously recording turbidity meter
US3396387A (en) *	1962-07-24	1968-08-06	Kidde & Co Walter	Supervised apparatus for detecting suspended matter in fluids
US3483385A (en) *	1966-05-09	1969-12-09	Bendix Corp	Apparatus for comparing the surface reflectivity of materials
US3505529A (en) *	1968-02-08	1970-04-07	Bliss Co	Radiation sensitive smoke detecting device
US3702734A (en) *	1971-05-03	1972-11-14	Saab Scania Ab	Calibration means for instrument for reading dust accumulations on dark slides

1973
- 1973-07-25 US US382521A patent/US3868184A/en not_active Expired - Lifetime
- 1973-10-31 CA CA184,698A patent/CA1014637A/en not_active Expired
- 1973-11-08 DE DE2355784A patent/DE2355784C2/en not_active Expired
- 1973-11-12 JP JP12714673A patent/JPS5711013B2/ja not_active Expired
- 1973-11-19 FR FR7341044A patent/FR2239168A5/fr not_active Expired
- 1973-11-23 IT IT9693/73A patent/IT1000974B/en active

Also Published As

Publication number	Publication date
JPS5711013B2 (en)	1982-03-02
CA1014637A (en)	1977-07-26
JPS5034874A (en)	1975-04-03
US3868184A (en)	1975-02-25
FR2239168A5 (en)	1975-02-21
DE2355784A1 (en)	1975-02-06
DE2355784C2 (en)	1983-10-27

Publication	Publication Date	Title
IT1000974B (en)	1976-04-10	OPTICAL SMOKE DETECTOR WITH LIGHT DISPERSION TEST DEVICE
NL179006C (en)	1986-06-16	OPTICAL DEVICE WITH A LIGHT CURTAIN.
CH530632A (en)	1972-11-15	Photometric testing device
IT991392B (en)	1975-07-30	OPTICAL ANALYZER DEVICE
DE6605546U (en)	1970-06-11	OPTICAL TESTING DEVICE
CA949351A (en)	1974-06-18	Photometric analyzer employing fiber optic light transmitting means
CH511430A (en)	1971-08-15	Photometric measuring device
SE7602391L (en)	1976-02-25	OPTICAL DEVICE
TR18544A (en)	1977-03-16	LIGHT WEIGHT CABLE ENCLOSURE
BE760209A (en)	1971-06-11	LIGHT CONSTRUCTION ELEMENTS
BE820132A (en)	1975-03-20	OPTICAL DEVICE
BE833480A (en)	1976-03-17	OPTICAL DEVICE
NL159789B (en)	1979-03-15	OPTICAL DISTANCE MEASURING DEVICE.
SE396265B (en)	1977-09-12	DEVICE FOR DIRECTION-FEED LIGHT BACK OVEN
IT992732B (en)	1975-09-30	OPTICAL ANALYZER DEVICE
AR202585A1 (en)	1975-06-24	LIGHT DIFFUSING DEVICE
FR2295444A1 (en)	1976-07-16	OPTICAL DEVICE
CH490683A (en)	1970-05-15	Optical measuring device
BE814040A (en)	1974-08-16	OPTICAL DEVICE
FR2279685A1 (en)	1976-02-20	OPTICAL GLASS
FR2301026A1 (en)	1976-09-10	OPTICAL SCAN DEVICE
IT1017844B (en)	1977-08-10	OPTICAL SHUTTER FOR VERIFYING THE OPERATION OF FLAME DETECTORS
BE788793A (en)	1973-01-02	GLASS FIBER LUMINAIRE
BE759538A (en)	1971-05-27	OPTICAL ELEMENTS
FR2336691A1 (en)	1977-07-22	OPTICAL DISTRIBUTION DEVICE