DE2428325A1 - Ionisations-feuermelder - Google Patents
Ionisations-feuermelderInfo
- Publication number
- DE2428325A1 DE2428325A1 DE19742428325 DE2428325A DE2428325A1 DE 2428325 A1 DE2428325 A1 DE 2428325A1 DE 19742428325 DE19742428325 DE 19742428325 DE 2428325 A DE2428325 A DE 2428325A DE 2428325 A1 DE2428325 A1 DE 2428325A1
- Authority
- DE
- Germany
- Prior art keywords
- ionization
- fire alarm
- alarm according
- electrode
- chambers
- 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.)
- Withdrawn
Links
- 239000004033 plastic Substances 0.000 claims description 16
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 9
- 238000009736 wetting Methods 0.000 claims description 4
- 239000004812 Fluorinated ethylene propylene Substances 0.000 claims description 2
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 claims description 2
- 229920009441 perflouroethylene propylene Polymers 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 238000007373 indentation Methods 0.000 claims 2
- 230000005855 radiation Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 3
- 230000002285 radioactive effect Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
- H01J41/02—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas
- H01J41/08—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of radioactive substances, e.g. alphatrons
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
- G01T7/12—Provision for actuation of an alarm
- G01T7/125—Alarm- or controlling circuits using ionisation chambers, proportional counters or Geiger-Mueller tubes, also functioning as UV detectors
-
- 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)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Detection Mechanisms (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00372552A US3832552A (en) | 1973-06-22 | 1973-06-22 | Dual chamber ionization smoke detector |
| US00372557A US3849685A (en) | 1973-06-22 | 1973-06-22 | Ionization chamber with recessed radioactive body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2428325A1 true DE2428325A1 (de) | 1975-01-23 |
Family
ID=27005819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19742428325 Withdrawn DE2428325A1 (de) | 1973-06-22 | 1974-06-12 | Ionisations-feuermelder |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU6988674A (enrdf_load_stackoverflow) |
| CH (1) | CH567310A5 (enrdf_load_stackoverflow) |
| DE (1) | DE2428325A1 (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5243330A (en) * | 1990-12-04 | 1993-09-07 | Cerberus Ag | Fire detector system and method |
-
1974
- 1974-06-07 AU AU69886/74A patent/AU6988674A/en not_active Expired
- 1974-06-12 DE DE19742428325 patent/DE2428325A1/de not_active Withdrawn
- 1974-06-17 CH CH827974A patent/CH567310A5/xx not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5243330A (en) * | 1990-12-04 | 1993-09-07 | Cerberus Ag | Fire detector system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CH567310A5 (enrdf_load_stackoverflow) | 1975-09-30 |
| AU6988674A (en) | 1975-12-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| 8130 | Withdrawal |