SE7701246L - FIREPLACE FACILITY - Google Patents
FIREPLACE FACILITYInfo
- Publication number
- SE7701246L SE7701246L SE7701246A SE7701246A SE7701246L SE 7701246 L SE7701246 L SE 7701246L SE 7701246 A SE7701246 A SE 7701246A SE 7701246 A SE7701246 A SE 7701246A SE 7701246 L SE7701246 L SE 7701246L
- Authority
- SE
- Sweden
- Prior art keywords
- chamber
- chambers
- air
- bipolar
- frequency
- Prior art date
Links
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)
- Fire Alarms (AREA)
Abstract
1528721 Ionization smoke sensors CERBERUS AG 1 Feb 1977 [6 Feb 1976 (2) 14 Oct 1976] 03997/77 Heading G1N [Also in Divisions G4 and H 1] A fire sensor includes both a bipolar ionization gauge and a unipolar ionization gauge connected to an evaluation circuit which initiates an alarm condition when the resistance of at least one of the chambers exceeds a predetermined threshold. By using two chambers smouldering fires are detected and the effects of air speed are mitigated. The unipolar chamber U, see Division H1, comprises a grid housing, which gives unhindered access to air, provided with a radio-active source which has a range and so positioned and/or screened that bipolar ions are generated only within a limited area of the chamber the remainder only including ions of one polarity. The bipolar chamber B on the other hand comprises a radio-active source mounted in a housing substantially impermeable to air but through which air can enter only after being retarded and deflected whereby ions of both polarity are generated throughout the housing. Each chamber may be connected in series with a resistor across supply lines with the junctions therebetween connected to a threshold circuit Fig. 4 (not shown) or as shown in Fig. 6 to a reference chamber R, the junctions being connected to the gates of FET's T I , T 2 which are connected to an OR gate and switch S (thyristor) to generate an alarm signal. The three chambers may be continued into a mechanical unit Figs. 7, 8 (not shown). The sensor may be connected to control the frequency of an astable multi-vibrator Fig. 9. In the absence of smoke the frequency of the multi-vibrator is such that the charge on capacitor 16 is sufficient to keep transistor 18 ON whereby relay contacts 20 are kept open. If the resistance of either of the chambers increases due to smoke the frequency falls and the charge on capacitor 16 falls and transistor 18 switches OFF whereby relay 19 releases and contacts 20 close to operate an alarm.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH146976A CH597659A5 (en) | 1976-02-06 | 1976-02-06 | |
| CH147076A CH604298A5 (en) | 1976-02-06 | 1976-02-06 | Fire detector using ionisation chambers |
| CH1303776A CH607180A5 (en) | 1976-10-14 | 1976-10-14 | Fire detector using ionisation chambers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE7701246L true SE7701246L (en) | 1977-08-07 |
| SE427780B SE427780B (en) | 1983-05-02 |
Family
ID=27172998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7701246A SE427780B (en) | 1976-02-06 | 1977-02-04 | BRANDALARMANLEGGNING |
Country Status (18)
| Country | Link |
|---|---|
| JP (1) | JPS5295999A (en) |
| AT (1) | AT363827B (en) |
| AU (1) | AU503702B2 (en) |
| CA (1) | CA1064625A (en) |
| DD (1) | DD128136A5 (en) |
| DE (1) | DE2700906C2 (en) |
| DK (1) | DK142687B (en) |
| ES (1) | ES455054A1 (en) |
| FI (1) | FI770273A (en) |
| FR (1) | FR2340587A1 (en) |
| GB (1) | GB1528721A (en) |
| IL (1) | IL51319A0 (en) |
| IT (1) | IT1077270B (en) |
| NL (1) | NL7701014A (en) |
| NO (1) | NO140869C (en) |
| NZ (1) | NZ183214A (en) |
| SE (1) | SE427780B (en) |
| YU (1) | YU27277A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014019773B4 (en) | 2014-12-17 | 2023-12-07 | Elmos Semiconductor Se | Device and method for distinguishing between solid objects, cooking fumes and smoke using the display of a mobile telephone |
| DE102014019172B4 (en) | 2014-12-17 | 2023-12-07 | Elmos Semiconductor Se | Device and method for distinguishing between solid objects, cooking fumes and smoke using a compensating optical measuring system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU48167A1 (en) * | 1965-03-11 | 1966-09-12 | Applic Electroniques Ets | |
| CH556072A (en) * | 1973-11-26 | 1974-11-15 | Cerberus Ag | IONIZATION ALARM. |
-
1976
- 1976-12-31 AT AT0989276A patent/AT363827B/en not_active IP Right Cessation
-
1977
- 1977-01-11 DE DE2700906A patent/DE2700906C2/en not_active Expired
- 1977-01-14 ES ES455054A patent/ES455054A1/en not_active Expired
- 1977-01-25 IL IL51319A patent/IL51319A0/en unknown
- 1977-01-25 FR FR7701986A patent/FR2340587A1/en active Granted
- 1977-01-26 CA CA270,474A patent/CA1064625A/en not_active Expired
- 1977-01-27 FI FI770273A patent/FI770273A/fi not_active Application Discontinuation
- 1977-01-31 NZ NZ183214A patent/NZ183214A/en unknown
- 1977-02-01 NL NL7701014A patent/NL7701014A/en not_active Application Discontinuation
- 1977-02-01 GB GB3997/77A patent/GB1528721A/en not_active Expired
- 1977-02-02 YU YU00272/77A patent/YU27277A/en unknown
- 1977-02-03 DD DD7700197220A patent/DD128136A5/en unknown
- 1977-02-03 IT IT19923/77A patent/IT1077270B/en active
- 1977-02-04 NO NO770369A patent/NO140869C/en unknown
- 1977-02-04 JP JP1088877A patent/JPS5295999A/en active Pending
- 1977-02-04 DK DK48377AA patent/DK142687B/en not_active Application Discontinuation
- 1977-02-04 SE SE7701246A patent/SE427780B/en not_active IP Right Cessation
- 1977-02-12 AU AU21856/77A patent/AU503702B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AU2185677A (en) | 1978-08-10 |
| ATA989276A (en) | 1981-01-15 |
| FR2340587A1 (en) | 1977-09-02 |
| DK142687B (en) | 1980-12-15 |
| NO140869B (en) | 1979-08-20 |
| DD128136A5 (en) | 1977-11-02 |
| DE2700906A1 (en) | 1977-08-11 |
| YU27277A (en) | 1982-06-30 |
| DE2700906C2 (en) | 1982-06-03 |
| CA1064625A (en) | 1979-10-16 |
| IT1077270B (en) | 1985-05-04 |
| FR2340587B1 (en) | 1983-02-25 |
| FI770273A (en) | 1977-08-07 |
| DK142687C (en) | 1981-08-03 |
| JPS5295999A (en) | 1977-08-12 |
| AT363827B (en) | 1981-09-10 |
| DK48377A (en) | 1977-08-07 |
| ES455054A1 (en) | 1978-02-16 |
| NL7701014A (en) | 1977-08-09 |
| AU503702B2 (en) | 1979-09-13 |
| NO770369L (en) | 1977-08-09 |
| SE427780B (en) | 1983-05-02 |
| IL51319A0 (en) | 1977-03-31 |
| NZ183214A (en) | 1980-12-19 |
| NO140869C (en) | 1979-11-28 |
| GB1528721A (en) | 1978-10-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |
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