CA1063260A - Indicating presence of a fire - Google Patents
Indicating presence of a fireInfo
- Publication number
- CA1063260A CA1063260A CA196,310A CA196310A CA1063260A CA 1063260 A CA1063260 A CA 1063260A CA 196310 A CA196310 A CA 196310A CA 1063260 A CA1063260 A CA 1063260A
- Authority
- CA
- Canada
- Prior art keywords
- signal
- fire
- capacitor
- resistor
- time constant
- 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
- 239000003990 capacitor Substances 0.000 claims abstract description 30
- 230000010354 integration Effects 0.000 claims abstract 5
- 239000000779 smoke Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 9
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 239000000443 aerosol Substances 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 abstract description 2
- 230000003252 repetitive effect Effects 0.000 abstract 1
- 230000004044 response Effects 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 238000009936 smoking Methods 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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
- G08B17/11—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
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire-Detection Mechanisms (AREA)
- Fire Alarms (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Alarm Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH462173A CH570016A5 (en)) | 1973-03-30 | 1973-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1063260A true CA1063260A (en) | 1979-09-25 |
Family
ID=4279532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA196,310A Expired CA1063260A (en) | 1973-03-30 | 1974-03-28 | Indicating presence of a fire |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US3872449A (en)) |
| JP (1) | JPS5619671B2 (en)) |
| AT (1) | AT340807B (en)) |
| BE (1) | BE812331A (en)) |
| CA (1) | CA1063260A (en)) |
| CH (1) | CH570016A5 (en)) |
| DE (1) | DE2408374B2 (en)) |
| DK (1) | DK137099B (en)) |
| ES (1) | ES425125A1 (en)) |
| FI (1) | FI55420C (en)) |
| FR (1) | FR2223766B1 (en)) |
| GB (1) | GB1430035A (en)) |
| IT (1) | IT1014554B (en)) |
| NL (1) | NL7403973A (en)) |
| NO (1) | NO136383C (en)) |
| SE (1) | SE389569B (en)) |
| ZA (1) | ZA741754B (en)) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5512635B2 (en)) * | 1972-07-26 | 1980-04-03 | ||
| CH576175A5 (en)) * | 1974-12-19 | 1976-05-31 | Cerberus Ag | |
| JPS5737265Y2 (en)) * | 1976-07-07 | 1982-08-17 | ||
| US4131888A (en) * | 1976-08-18 | 1978-12-26 | American District Telegraph Company | Dual projected-beam smoke detector |
| US4091363A (en) * | 1977-01-03 | 1978-05-23 | Pittway Corporation | Self-contained fire detector with interconnection circuitry |
| FR2386874A1 (fr) * | 1977-04-08 | 1978-11-03 | Gamma Electronic | Detecteur de fumees a ionisation associe a un circuit electronique de mesure velocimetrique |
| US4222046A (en) * | 1978-07-31 | 1980-09-09 | Honeywell Inc. | Abnormal condition responsive means with periodic high sensitivity |
| US4250500A (en) * | 1979-10-22 | 1981-02-10 | Rca Corporation | Smoke detector |
| CA1148279A (en) * | 1979-12-14 | 1983-06-14 | Andreas Scheidweiler | Ionization smoke detector with increased operational reliability |
| DE3127324A1 (de) * | 1981-07-10 | 1983-01-27 | Siemens AG, 1000 Berlin und 8000 München | Verfahren und anordnung zur erhoehung der ansprechempfindlichkeit und der stoersicherheit in einer gefahren-, insbesondere brandmeldeanlage |
| US4539488A (en) * | 1981-11-30 | 1985-09-03 | Zenith Electronics Corporation | Pulse wave to parabola wave converter |
| JPS60126798A (ja) * | 1983-12-13 | 1985-07-06 | ニッタン株式会社 | 環境異常検出装置 |
| US5019805A (en) * | 1989-02-03 | 1991-05-28 | Flash-Alert Inc. | Smoke detector with strobed visual alarm and remote alarm coupling |
| US6188318B1 (en) | 1999-06-29 | 2001-02-13 | Pittway Corp. | Dual-technology intrusion detector with pet immunity |
| CN102455288B (zh) * | 2010-10-15 | 2014-10-15 | 西门子公司 | 通过在线信号电平监控对传感器装置的光电信号路径进行校准 |
| DE102014019773B4 (de) | 2014-12-17 | 2023-12-07 | Elmos Semiconductor Se | Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mittels des Displays eines Mobiltelefons |
| DE102014019172B4 (de) | 2014-12-17 | 2023-12-07 | Elmos Semiconductor Se | Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mit einem kompensierenden optischen Messsystem |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2735007A (en) * | 1956-02-14 | Time-base generator | ||
| US2811711A (en) * | 1951-05-19 | 1957-10-29 | Electronics Corp America | Fire method and apparatus |
| US3582676A (en) * | 1968-09-24 | 1971-06-01 | Bendix Corp | Pulse length normalizing and short pulse eliminating circuit |
| US3531692A (en) * | 1969-03-03 | 1970-09-29 | Combustion Eng | Activity detector having increased accuracy of response |
| JPS482587U (en)) * | 1971-05-25 | 1973-01-12 |
-
1973
- 1973-03-30 CH CH462173A patent/CH570016A5/xx not_active IP Right Cessation
-
1974
- 1974-02-21 AT AT144074A patent/AT340807B/de not_active IP Right Cessation
- 1974-02-21 DE DE2408374A patent/DE2408374B2/de not_active Ceased
- 1974-03-08 US US449287A patent/US3872449A/en not_active Expired - Lifetime
- 1974-03-14 FR FR7408640A patent/FR2223766B1/fr not_active Expired
- 1974-03-14 BE BE142033A patent/BE812331A/xx not_active IP Right Cessation
- 1974-03-18 ZA ZA00741754A patent/ZA741754B/xx unknown
- 1974-03-25 NL NL7403973A patent/NL7403973A/xx unknown
- 1974-03-27 NO NO741081A patent/NO136383C/no unknown
- 1974-03-28 FI FI960/74A patent/FI55420C/fi active
- 1974-03-28 CA CA196,310A patent/CA1063260A/en not_active Expired
- 1974-03-28 JP JP3406574A patent/JPS5619671B2/ja not_active Expired
- 1974-03-29 SE SE7404260A patent/SE389569B/xx unknown
- 1974-03-29 DK DK175474AA patent/DK137099B/da not_active IP Right Cessation
- 1974-03-29 GB GB1412074A patent/GB1430035A/en not_active Expired
- 1974-03-30 ES ES425125A patent/ES425125A1/es not_active Expired
- 1974-04-08 IT IT20649/74A patent/IT1014554B/it active
Also Published As
| Publication number | Publication date |
|---|---|
| DE2408374B2 (de) | 1978-06-01 |
| NO136383C (no) | 1977-08-31 |
| AT340807B (de) | 1978-01-10 |
| SE389569B (sv) | 1976-11-08 |
| JPS5619671B2 (en)) | 1981-05-08 |
| JPS49131099A (en)) | 1974-12-16 |
| DK137099C (en)) | 1978-06-12 |
| FI55420C (fi) | 1979-07-10 |
| AU6689674A (en) | 1975-09-25 |
| ATA144074A (de) | 1977-04-15 |
| US3872449A (en) | 1975-03-18 |
| NL7403973A (en)) | 1974-10-02 |
| CH570016A5 (en)) | 1975-11-28 |
| GB1430035A (en) | 1976-03-31 |
| ES425125A1 (es) | 1976-06-16 |
| IT1014554B (it) | 1977-04-30 |
| FR2223766A1 (en)) | 1974-10-25 |
| ZA741754B (en) | 1975-01-29 |
| DE2408374A1 (de) | 1974-10-17 |
| FI55420B (fi) | 1979-03-30 |
| BE812331A (fr) | 1974-07-01 |
| NO741081L (no) | 1974-10-01 |
| NO136383B (en)) | 1977-05-16 |
| FR2223766B1 (en)) | 1978-12-01 |
| DK137099B (da) | 1978-01-16 |
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