IT942068B - Rivelatore fotoelettrico con foto cellula di compensazione per il controllo della presenza di fumo od altro sospese in uno spazio - Google Patents
Rivelatore fotoelettrico con foto cellula di compensazione per il controllo della presenza di fumo od altro sospese in uno spazioInfo
- Publication number
- IT942068B IT942068B IT9803/71A IT980371A IT942068B IT 942068 B IT942068 B IT 942068B IT 9803/71 A IT9803/71 A IT 9803/71A IT 980371 A IT980371 A IT 980371A IT 942068 B IT942068 B IT 942068B
- Authority
- IT
- Italy
- Prior art keywords
- smoke
- checking
- suspended
- space
- photoelectric detector
- Prior art date
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
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/063—Illuminating optical parts
- G01N2201/0638—Refractive parts
- G01N2201/0639—Sphere lens
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fire-Detection Mechanisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Optical Measuring Cells (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14963771A | 1971-06-03 | 1971-06-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT942068B true IT942068B (it) | 1973-03-20 |
Family
ID=22531192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT9803/71A IT942068B (it) | 1971-06-03 | 1971-12-18 | Rivelatore fotoelettrico con foto cellula di compensazione per il controllo della presenza di fumo od altro sospese in uno spazio |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3723747A (it) |
| CA (1) | CA963122A (it) |
| DE (1) | DE2165697A1 (it) |
| FR (1) | FR2141655B1 (it) |
| GB (1) | GB1370811A (it) |
| IT (1) | IT942068B (it) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1439129A (en) * | 1972-09-21 | 1976-06-09 | Ferranti Ltd | Detection of blemishes in surfaces |
| JPS49148088U (it) * | 1973-04-20 | 1974-12-20 | ||
| US3863076A (en) * | 1973-07-24 | 1975-01-28 | Electro Signal Lab | Optical smoke detector |
| JPS5092181A (it) * | 1973-12-13 | 1975-07-23 | ||
| JPS50134172A (it) * | 1974-04-17 | 1975-10-24 | ||
| US3936814A (en) * | 1974-04-29 | 1976-02-03 | Bernz-O-Matic Corporation | Smoke detector and alarm |
| US4114177A (en) * | 1975-05-01 | 1978-09-12 | Bell Telephone Laboratories, Incorporated | Optically coupled device with diffusely reflecting enclosure |
| DK237780A (da) * | 1979-06-19 | 1980-12-20 | Secon Co Ltd | Roegdetektor |
| GB2123548B (en) * | 1982-07-14 | 1985-09-04 | Chloride Group Plc | Suspended particle detector |
| TW566634U (en) * | 2002-05-13 | 2003-12-11 | Prec Instr Developement Ct Nat | Sensitivity adjustment device of photoelectric smoke detector |
| CN102768185A (zh) * | 2006-08-02 | 2012-11-07 | 阿瓦尼斯实验室科技公司 | 光度计和操作方法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1968816A (en) * | 1930-07-18 | 1934-08-07 | Sewell M Corbett | Meter for quantitatively determining the amount of foreign matter in air |
| US2510347A (en) * | 1945-10-19 | 1950-06-06 | Rca Corp | Photoelectric comparator having two bridge circuits |
| US2519081A (en) * | 1949-01-07 | 1950-08-15 | Standard Oil Dev Co | Process and apparatus for determining rate of composition change |
| US2791932A (en) * | 1953-07-30 | 1957-05-14 | Specialties Dev Corp | Light responsive apparatus for detecting suspended matter in a fluid |
| US2967946A (en) * | 1957-10-31 | 1961-01-10 | Standard Oil Co | Light transmissivity control instrument |
| US3439178A (en) * | 1965-02-08 | 1969-04-15 | Owens Illinois Inc | Radiation-sensitive apparatus for inspecting wall thickness of hollow containers |
| US3365661A (en) * | 1965-04-26 | 1968-01-23 | Anaconda Wire & Cable Co | Method and apparatus for locating leaks in a cable by determining the distance to a short circuit in the cable |
| GB1227941A (it) * | 1967-03-16 | 1971-04-15 | ||
| US3505529A (en) * | 1968-02-08 | 1970-04-07 | Bliss Co | Radiation sensitive smoke detecting device |
| US3518437A (en) * | 1968-03-20 | 1970-06-30 | Shell Oil Co | Apparatus for measuring haze in flowing liquids utilizing an operational amplifier with photosensitive feedback and input resistors for computing the ratio of scattered to directly transmitted light |
-
1971
- 1971-06-03 US US00149637A patent/US3723747A/en not_active Expired - Lifetime
- 1971-12-10 GB GB5744871A patent/GB1370811A/en not_active Expired
- 1971-12-18 IT IT9803/71A patent/IT942068B/it active
- 1971-12-22 CA CA130,830A patent/CA963122A/en not_active Expired
- 1971-12-28 FR FR717147163A patent/FR2141655B1/fr not_active Expired
- 1971-12-30 DE DE19712165697 patent/DE2165697A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US3723747A (en) | 1973-03-27 |
| GB1370811A (en) | 1974-10-16 |
| DE2165697A1 (de) | 1972-12-14 |
| CA963122A (en) | 1975-02-18 |
| FR2141655B1 (it) | 1973-07-13 |
| FR2141655A1 (it) | 1973-01-26 |
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