CA1056931A - Smoke detector - Google Patents
Smoke detectorInfo
- Publication number
- CA1056931A CA1056931A CA207,336A CA207336A CA1056931A CA 1056931 A CA1056931 A CA 1056931A CA 207336 A CA207336 A CA 207336A CA 1056931 A CA1056931 A CA 1056931A
- Authority
- CA
- Canada
- Prior art keywords
- pulse
- flip
- amplifier
- light
- output
- 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 claims abstract description 45
- 239000002245 particle Substances 0.000 claims abstract description 8
- 230000004044 response Effects 0.000 claims description 14
- 230000003213 activating effect Effects 0.000 claims description 2
- 230000006872 improvement Effects 0.000 claims description 2
- 229940035564 duration Drugs 0.000 claims 1
- 230000000977 initiatory effect Effects 0.000 claims 1
- QHGVXILFMXYDRS-UHFFFAOYSA-N pyraclofos Chemical compound C1=C(OP(=O)(OCC)SCCC)C=NN1C1=CC=C(Cl)C=C1 QHGVXILFMXYDRS-UHFFFAOYSA-N 0.000 claims 1
- 238000009877 rendering Methods 0.000 claims 1
- 239000003990 capacitor Substances 0.000 abstract description 29
- 230000008859 change Effects 0.000 abstract description 10
- 230000001052 transient effect Effects 0.000 abstract description 6
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000023077 detection of light stimulus Effects 0.000 abstract 1
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
Landscapes
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Detection Mechanisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA295,627A CA1067175A (en) | 1973-11-26 | 1978-01-25 | Smoke detector |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US41920673A | 1973-11-26 | 1973-11-26 | |
| US449362A US3917956A (en) | 1974-03-08 | 1974-03-08 | Smoke detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1056931A true CA1056931A (en) | 1979-06-19 |
Family
ID=27024396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA207,336A Expired CA1056931A (en) | 1973-11-26 | 1974-08-19 | Smoke detector |
Country Status (11)
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5354000A (en) * | 1976-10-26 | 1978-05-16 | Matsushita Electric Works Ltd | Detection signal processing circuit of photoelectric type smoke detectors |
| US4125779A (en) * | 1977-07-13 | 1978-11-14 | Chloride, Incorporated | Smoke detector |
| CH638331A5 (de) * | 1979-02-22 | 1983-09-15 | Cerberus Ag | Rauchdetektor. |
| DE3063643D1 (en) * | 1979-02-26 | 1983-07-14 | Cerberus Ag | Fire detector using pulsed radiation |
| BE881812A (nl) * | 1979-12-17 | 1980-06-16 | Cerberus Ag | Meldingsstelsel |
| JPS5716956U (enrdf_load_stackoverflow) * | 1980-06-30 | 1982-01-28 | ||
| JPS6014398B2 (ja) * | 1981-03-18 | 1985-04-12 | ホーチキ株式会社 | 光電式煙感知器 |
| EP0145189B1 (en) * | 1983-10-21 | 1990-08-08 | COLE, Martin Terence | Improvements relating to smoke detection apparatus |
| JPS6151U (ja) * | 1985-05-17 | 1986-01-06 | 京セラ株式会社 | 光電式煙検出報知装置 |
| AU2020279396A1 (en) * | 2019-05-23 | 2021-12-02 | Northgate Technologies Inc. | System and method for smoke removal in a gas recirculation system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH417405A (de) * | 1964-07-14 | 1966-07-15 | Cerberus Ag Werk Fuer Elektron | Vorrichtung zur Feststellung von Aerosolen in Luft |
| US3382762A (en) * | 1967-02-21 | 1968-05-14 | Alfred W. Vasel | Smoke detecting device |
| US3555532A (en) | 1968-10-29 | 1971-01-12 | Graham Stuart Corp | Vapor or particle detection device |
| GB1278205A (en) * | 1970-02-11 | 1972-06-21 | Shorrock Develpoments Ltd | Smoke detecting device |
| CH520990A (de) * | 1970-12-21 | 1972-03-31 | Cerberus Ag | Rauchdetektor |
-
1974
- 1974-07-22 IL IL45331A patent/IL45331A/en unknown
- 1974-07-26 NL NL7410079A patent/NL7410079A/xx not_active Application Discontinuation
- 1974-08-01 IN IN1715/CAL/1974A patent/IN143206B/en unknown
- 1974-08-07 CH CH1079974A patent/CH580848A5/xx not_active IP Right Cessation
- 1974-08-07 CH CH560576A patent/CH599645A5/xx not_active IP Right Cessation
- 1974-08-16 JP JP49094109A patent/JPS50114275A/ja active Pending
- 1974-08-19 CA CA207,336A patent/CA1056931A/en not_active Expired
- 1974-08-22 CS CS7400005834A patent/CS186786B2/cs unknown
- 1974-10-09 DE DE2462876A patent/DE2462876C2/de not_active Expired
- 1974-10-09 DE DE2448195A patent/DE2448195C2/de not_active Expired
- 1974-10-18 BR BR8707/74A patent/BR7408707D0/pt unknown
- 1974-10-22 GB GB45706/74A patent/GB1490866A/en not_active Expired
-
1975
- 1975-01-31 FR FR7503156A patent/FR2254024B3/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2462876C2 (de) | 1983-06-09 |
| AU7330074A (en) | 1976-03-18 |
| CH599645A5 (enrdf_load_stackoverflow) | 1978-05-31 |
| IL45331A0 (en) | 1974-10-22 |
| IN143206B (enrdf_load_stackoverflow) | 1977-10-15 |
| DE2448195C2 (de) | 1984-08-23 |
| JPS50114275A (enrdf_load_stackoverflow) | 1975-09-08 |
| CH580848A5 (enrdf_load_stackoverflow) | 1976-10-15 |
| FR2254024A1 (enrdf_load_stackoverflow) | 1975-07-04 |
| GB1490866A (en) | 1977-11-02 |
| BR7408707D0 (pt) | 1975-08-26 |
| IL45331A (en) | 1977-12-30 |
| DE2448195A1 (de) | 1975-05-28 |
| NL7410079A (nl) | 1975-05-28 |
| CS186786B2 (en) | 1978-12-29 |
| FR2254024B3 (enrdf_load_stackoverflow) | 1979-02-02 |
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