GB1240187A - Sensitive light and smoke detecting device with memory system - Google Patents
Sensitive light and smoke detecting device with memory systemInfo
- Publication number
- GB1240187A GB1240187A GB49887/68A GB4988768A GB1240187A GB 1240187 A GB1240187 A GB 1240187A GB 49887/68 A GB49887/68 A GB 49887/68A GB 4988768 A GB4988768 A GB 4988768A GB 1240187 A GB1240187 A GB 1240187A
- Authority
- GB
- United Kingdom
- Prior art keywords
- photo
- detecting device
- memory system
- sensitive light
- smoke detecting
- 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
- 239000000779 smoke Substances 0.000 title abstract 2
- 239000000443 aerosol Substances 0.000 abstract 1
- 230000004888 barrier function Effects 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/42—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/44—Electric circuits
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
1,240,187. Photo-conductor circuit. TOKYO KEIKI SEIZOSHO CO. Ltd. Oct.21, 1968 [Oct.25, 1967], No.49887/68. Heading G1A. In a light responsive circuit a photo-conductive device 4 is connected in series with a parallel circuit comprising a discharge tube 3 in parallel with a resistor 5 and the discharge tube is optically coupled with the photo-conductive device to form a lock-up device. Application to a smoke detector producing an output on terminals 9, 10 is referred to, and an arrangement including a light barrier in front of the detector so that it is energized only by scattered light is described. The apparatus may be used also for aerosols and particles suspended in liquids.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6832667 | 1967-10-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1240187A true GB1240187A (en) | 1971-07-21 |
Family
ID=13370572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB49887/68A Expired GB1240187A (en) | 1967-10-25 | 1968-10-21 | Sensitive light and smoke detecting device with memory system |
Country Status (2)
Country | Link |
---|---|
US (1) | US3663859A (en) |
GB (1) | GB1240187A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070218983A1 (en) * | 2006-03-15 | 2007-09-20 | Charles Lombardo | Progressive gaming systems and methods |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2386320A (en) * | 1943-03-24 | 1945-10-09 | Alco Gravure Division Of Publi | Exposure meter |
US2849622A (en) * | 1946-07-19 | 1958-08-26 | Darrin H Gridley | Control circuits |
US3034011A (en) * | 1959-12-03 | 1962-05-08 | Lockheed Aircraft Corp | Combined optical and electronic circuit devices |
US3213441A (en) * | 1962-06-27 | 1965-10-19 | Gen Dynamics Corp | Readout display system with memory |
US3233781A (en) * | 1963-05-08 | 1966-02-08 | Savin Business Machines Corp | Toner control system |
US3376425A (en) * | 1965-10-12 | 1968-04-02 | Robert H Wager Co Inc | Smoke density and color indicating means |
-
1968
- 1968-10-21 GB GB49887/68A patent/GB1240187A/en not_active Expired
-
1970
- 1970-11-23 US US91782A patent/US3663859A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US3663859A (en) | 1972-05-16 |
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