DE2204930C3 - Ionisationsfeuermelder - Google Patents
IonisationsfeuermelderInfo
- Publication number
- DE2204930C3 DE2204930C3 DE19722204930 DE2204930A DE2204930C3 DE 2204930 C3 DE2204930 C3 DE 2204930C3 DE 19722204930 DE19722204930 DE 19722204930 DE 2204930 A DE2204930 A DE 2204930A DE 2204930 C3 DE2204930 C3 DE 2204930C3
- Authority
- DE
- Germany
- Prior art keywords
- ionization
- potential
- alarm
- fire alarm
- effect transistor
- 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
- 230000005669 field effect Effects 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000000443 aerosol Substances 0.000 claims description 4
- 238000004382 potting Methods 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000002360 explosive Substances 0.000 claims description 2
- 238000002955 isolation Methods 0.000 claims description 2
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 239000000779 smoke Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims 7
- 239000000428 dust Substances 0.000 claims 3
- 239000002245 particle Substances 0.000 claims 2
- 230000001960 triggered effect Effects 0.000 claims 2
- 239000013543 active substance Substances 0.000 claims 1
- 239000002817 coal dust Substances 0.000 claims 1
- 239000004020 conductor Substances 0.000 claims 1
- 238000011109 contamination Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 238000004880 explosion Methods 0.000 claims 1
- 239000012212 insulator Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 claims 1
- 230000002028 premature Effects 0.000 claims 1
- 238000005086 pumping Methods 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 claims 1
- 230000006978 adaptation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229940125898 compound 5 Drugs 0.000 description 1
- 239000000758 substrate Substances 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)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD15296071 | 1971-02-08 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2204930A1 DE2204930A1 (de) | 1972-08-24 |
| DE2204930B2 DE2204930B2 (de) | 1973-11-22 |
| DE2204930C3 true DE2204930C3 (de) | 1974-06-20 |
Family
ID=5483427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19722204930 Expired DE2204930C3 (de) | 1971-02-08 | 1972-02-02 | Ionisationsfeuermelder |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE2204930C3 (enExample) |
| FR (1) | FR2124568B1 (enExample) |
| SE (1) | SE370587B (enExample) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA745453B (en) * | 1974-08-26 | 1976-04-28 | Anglo Amer Corp South Africa | Improvements in or relating to fire detectors |
-
1972
- 1972-02-02 DE DE19722204930 patent/DE2204930C3/de not_active Expired
- 1972-02-07 SE SE137772A patent/SE370587B/xx unknown
- 1972-02-08 FR FR7204182A patent/FR2124568B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2124568A1 (enExample) | 1972-09-22 |
| FR2124568B1 (enExample) | 1977-04-01 |
| DE2204930B2 (de) | 1973-11-22 |
| DE2204930A1 (de) | 1972-08-24 |
| SE370587B (enExample) | 1974-10-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C3 | Grant after two publication steps (3rd publication) | ||
| E77 | Valid patent as to the heymanns-index 1977 | ||
| EGA | New person/name/address of the applicant | ||
| 8339 | Ceased/non-payment of the annual fee |