IT8048651A0 - IMPROVEMENT IN OPTICAL-ELECTRONIC SMOKE DETECTOR DEVICES - Google Patents
IMPROVEMENT IN OPTICAL-ELECTRONIC SMOKE DETECTOR DEVICESInfo
- Publication number
- IT8048651A0 IT8048651A0 IT8048651A IT4865180A IT8048651A0 IT 8048651 A0 IT8048651 A0 IT 8048651A0 IT 8048651 A IT8048651 A IT 8048651A IT 4865180 A IT4865180 A IT 4865180A IT 8048651 A0 IT8048651 A0 IT 8048651A0
- Authority
- IT
- Italy
- Prior art keywords
- improvement
- optical
- smoke detector
- electronic smoke
- detector devices
- Prior art date
Links
- 239000000779 smoke Substances 0.000 title 1
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
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Emergency Management (AREA)
- Business, Economics & Management (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
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 true IT8048651A0 (en) | 1980-05-12 |
IT1143096B 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)
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 |
-
1980
- 1980-05-10 DE DE3018021A patent/DE3018021A1/en active Granted
- 1980-05-12 IT IT48651/80A patent/IT1143096B/en active
- 1980-05-12 CH CH3712/80A patent/CH651410A5/en not_active IP Right Cessation
- 1980-05-12 FR FR8010612A patent/FR2456529A1/en not_active Withdrawn
- 1980-05-12 SE SE8003547A patent/SE8003547L/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
CH651410A5 (en) | 1985-09-13 |
FR2456529A1 (en) | 1980-12-12 |
DE3018021A1 (en) | 1980-11-27 |
IT1143096B (en) | 1986-10-22 |
DE3018021C2 (en) | 1989-04-20 |
SE8003547L (en) | 1980-11-17 |
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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 |