GB2177505B - Photoelectric smoke detectors - Google Patents
Photoelectric smoke detectorsInfo
- Publication number
- GB2177505B GB2177505B GB8615548A GB8615548A GB2177505B GB 2177505 B GB2177505 B GB 2177505B GB 8615548 A GB8615548 A GB 8615548A GB 8615548 A GB8615548 A GB 8615548A GB 2177505 B GB2177505 B GB 2177505B
- Authority
- GB
- United Kingdom
- Prior art keywords
- smoke detectors
- photoelectric smoke
- photoelectric
- detectors
- 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.)
- Expired
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
- 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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60144658A JPS626144A (en) | 1985-07-03 | 1985-07-03 | Photoelectric type smoke sensor |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8615548D0 GB8615548D0 (en) | 1986-07-30 |
GB2177505A GB2177505A (en) | 1987-01-21 |
GB2177505B true GB2177505B (en) | 1989-07-12 |
Family
ID=15367211
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8615548A Expired GB2177505B (en) | 1985-07-03 | 1986-06-25 | Photoelectric smoke detectors |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS626144A (en) |
GB (1) | GB2177505B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3330438B2 (en) * | 1993-12-16 | 2002-09-30 | 能美防災株式会社 | Smoke detector and its adjusting device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1434658A (en) * | 1972-12-27 | 1976-05-05 | Electro Signal Lab | Optical particle detectors with light scattering test device |
GB1501698A (en) * | 1974-04-17 | 1978-02-22 | Hochiki Co | Photoelectric smoke detectors |
GB2000282A (en) * | 1977-06-27 | 1979-01-04 | Nittan Co Ltd | Light scattering smoke detector |
GB2009399A (en) * | 1977-11-29 | 1979-06-13 | Chloride Inc | Checking a smoke detector |
EP0079011A1 (en) * | 1981-11-11 | 1983-05-18 | Cerberus Ag | Smoke detector |
US4488049A (en) * | 1981-11-09 | 1984-12-11 | American District Telegraph Company | Moving wall test device in optical smoke detectors |
-
1985
- 1985-07-03 JP JP60144658A patent/JPS626144A/en active Granted
-
1986
- 1986-06-25 GB GB8615548A patent/GB2177505B/en not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1434658A (en) * | 1972-12-27 | 1976-05-05 | Electro Signal Lab | Optical particle detectors with light scattering test device |
GB1501698A (en) * | 1974-04-17 | 1978-02-22 | Hochiki Co | Photoelectric smoke detectors |
GB2000282A (en) * | 1977-06-27 | 1979-01-04 | Nittan Co Ltd | Light scattering smoke detector |
GB2009399A (en) * | 1977-11-29 | 1979-06-13 | Chloride Inc | Checking a smoke detector |
US4488049A (en) * | 1981-11-09 | 1984-12-11 | American District Telegraph Company | Moving wall test device in optical smoke detectors |
EP0079011A1 (en) * | 1981-11-11 | 1983-05-18 | Cerberus Ag | Smoke detector |
Also Published As
Publication number | Publication date |
---|---|
GB2177505A (en) | 1987-01-21 |
JPS626144A (en) | 1987-01-13 |
JPH0424654B2 (en) | 1992-04-27 |
GB8615548D0 (en) | 1986-07-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20030625 |