JPH02123691U - - Google Patents
Info
- Publication number
- JPH02123691U JPH02123691U JP1989032146U JP3214689U JPH02123691U JP H02123691 U JPH02123691 U JP H02123691U JP 1989032146 U JP1989032146 U JP 1989032146U JP 3214689 U JP3214689 U JP 3214689U JP H02123691 U JPH02123691 U JP H02123691U
- Authority
- JP
- Japan
- Prior art keywords
- light
- smoke detector
- change
- detection
- photoelectric smoke
- 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.)
- Pending
Links
- 239000000779 smoke Substances 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims 1
- 230000002238 attenuated effect Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 2
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/18—Prevention or correction of operating errors
- G08B29/20—Calibration, including self-calibrating arrangements
- G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components
-
- 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)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Fire-Detection Mechanisms (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989032146U JPH02123691U (US07321065-20080122-C00160.png) | 1989-03-23 | 1989-03-23 | |
| GB9004603A GB2230853B (en) | 1989-03-23 | 1990-03-01 | Photoelectric smoke sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989032146U JPH02123691U (US07321065-20080122-C00160.png) | 1989-03-23 | 1989-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02123691U true JPH02123691U (US07321065-20080122-C00160.png) | 1990-10-11 |
Family
ID=12350762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989032146U Pending JPH02123691U (US07321065-20080122-C00160.png) | 1989-03-23 | 1989-03-23 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH02123691U (US07321065-20080122-C00160.png) |
| GB (1) | GB2230853B (US07321065-20080122-C00160.png) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06288917A (ja) * | 1993-03-31 | 1994-10-18 | Nohmi Bosai Ltd | 煙式火災感知器 |
| DE19902319B4 (de) * | 1999-01-21 | 2011-06-30 | Novar GmbH, Albstadt-Ebingen Zweigniederlassung Neuss, 41469 | Streulichtbrandmelder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61285598A (ja) * | 1985-06-11 | 1986-12-16 | 八洲電機株式会社 | 煙感知装置 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1172354A (en) * | 1966-02-16 | 1969-11-26 | Pyrene Co Ltd | Improvements relating to Smoke Detectors |
| US3879718A (en) * | 1970-09-16 | 1975-04-22 | Gordon A Roberts | Smoke detection unit with dual purpose alarm circuit |
| CA1052887A (en) * | 1974-11-27 | 1979-04-17 | Pyrotector | Smoke detector |
| US4249169A (en) * | 1979-05-18 | 1981-02-03 | Malinowski William J | Optical smoke detector |
| DE3146110A1 (de) * | 1980-11-24 | 1982-06-16 | Hekatron GmbH, 7811 Sulzburg | "optischer rauchdetektor" |
| AU573243B2 (en) * | 1983-08-12 | 1988-06-02 | Vision Systems Limited | Pollution detecting apparatus |
-
1989
- 1989-03-23 JP JP1989032146U patent/JPH02123691U/ja active Pending
-
1990
- 1990-03-01 GB GB9004603A patent/GB2230853B/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61285598A (ja) * | 1985-06-11 | 1986-12-16 | 八洲電機株式会社 | 煙感知装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2230853B (en) | 1993-03-17 |
| GB2230853A (en) | 1990-10-31 |
| GB9004603D0 (en) | 1990-04-25 |
