GB715519A - Method and apparatus for detection of smoke - Google Patents
Method and apparatus for detection of smokeInfo
- Publication number
- GB715519A GB715519A GB20345/52A GB2034552A GB715519A GB 715519 A GB715519 A GB 715519A GB 20345/52 A GB20345/52 A GB 20345/52A GB 2034552 A GB2034552 A GB 2034552A GB 715519 A GB715519 A GB 715519A
- Authority
- GB
- United Kingdom
- Prior art keywords
- smoke
- photo
- cell
- electric
- reach
- 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
- 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)
Abstract
715,519. Photo-electric smoke detectors. KIDDE CO., Ltd., W. July 28, 1953 [Aug. 13, 1952], No. 20345/52. Class 40 (3) A photo-electric smoke detector comprises a housing 1 into which smoke from compartments under examination is drawn through an opening, 2, two sides of the compartment being of light polarizing material 3 polarized in planes at right angles to each other and having a photo-electric cell 5 situated behind one side and a light source 4 behind the other. The photo-electric cell feeds a micro-ammeter 6 serving as a current responsive switch controlling a relay. Thus in the absence of the smoke more of the light from source 4 is able to reach the photo-cell whereas with smoke present sufficient will reach the cell to actuate a relay controlling an alarm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB20345/52A GB715519A (en) | 1952-08-13 | 1952-08-13 | Method and apparatus for detection of smoke |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB20345/52A GB715519A (en) | 1952-08-13 | 1952-08-13 | Method and apparatus for detection of smoke |
Publications (1)
Publication Number | Publication Date |
---|---|
GB715519A true GB715519A (en) | 1954-09-15 |
Family
ID=10144412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20345/52A Expired GB715519A (en) | 1952-08-13 | 1952-08-13 | Method and apparatus for detection of smoke |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB715519A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2104804A1 (en) * | 1970-07-24 | 1972-04-21 | Ericsson Telefon Ab L M | |
FR2369559A1 (en) * | 1976-10-29 | 1978-05-26 | Itt | DEVICE FOR MEASURING THE RATE OF OIL POLLUTION |
FR2404215A1 (en) * | 1977-09-26 | 1979-04-20 | Bendix Corp | DEVICE FOR MONITORING THE DUST CONCENTRATION OF AN AEROSOL |
-
1952
- 1952-08-13 GB GB20345/52A patent/GB715519A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2104804A1 (en) * | 1970-07-24 | 1972-04-21 | Ericsson Telefon Ab L M | |
FR2369559A1 (en) * | 1976-10-29 | 1978-05-26 | Itt | DEVICE FOR MEASURING THE RATE OF OIL POLLUTION |
FR2404215A1 (en) * | 1977-09-26 | 1979-04-20 | Bendix Corp | DEVICE FOR MONITORING THE DUST CONCENTRATION OF AN AEROSOL |
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