GB1200120A - Improvements in or relating to fire alarms - Google Patents
Improvements in or relating to fire alarmsInfo
- Publication number
- GB1200120A GB1200120A GB59190/67A GB5919067A GB1200120A GB 1200120 A GB1200120 A GB 1200120A GB 59190/67 A GB59190/67 A GB 59190/67A GB 5919067 A GB5919067 A GB 5919067A GB 1200120 A GB1200120 A GB 1200120A
- Authority
- GB
- United Kingdom
- Prior art keywords
- detector
- fire
- resistor
- ionization chamber
- feedback
- 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
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1875166A CH468683A (de) | 1966-12-29 | 1966-12-29 | Feuermelder mit einer elektrischen Rückkopplungsanordnung |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1200120A true GB1200120A (en) | 1970-07-29 |
Family
ID=4435069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB59190/67A Expired GB1200120A (en) | 1966-12-29 | 1967-12-29 | Improvements in or relating to fire alarms |
Country Status (7)
Country | Link |
---|---|
US (1) | US3559196A (de) |
AT (1) | AT278597B (de) |
BE (1) | BE707959A (de) |
CH (1) | CH468683A (de) |
DK (1) | DK122548B (de) |
GB (1) | GB1200120A (de) |
SE (1) | SE330659B (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3946374A (en) * | 1970-08-13 | 1976-03-23 | Sci Systems, Inc. | Rate-of-change combustion and contamination detection device |
JPS4940290Y1 (de) * | 1970-11-19 | 1974-11-05 | ||
US3866195A (en) * | 1973-05-07 | 1975-02-11 | Fire Alert Company | Combustion product detector and method of calibrating |
DE2327497C3 (de) * | 1973-05-30 | 1981-12-24 | Benno 5430 Wettingen Aargau Perren | Melder für Widerstandsänderungen mit nachgeschalteter Alarmeinrichtung |
US4109240A (en) * | 1973-11-26 | 1978-08-22 | Cerberus Ag. | Ionization-type fire sensing system |
DE2546970C3 (de) * | 1975-10-20 | 1981-09-10 | Preussag Ag Feuerschutz, 2060 Bad Oldesloe | Ionisations-Rauchmelder |
DE2707409C2 (de) * | 1977-02-21 | 1985-02-21 | Hartwig Dipl.-Ing. 2409 Scharbeutz Beyersdorf | Ionisationsbrandmelder |
DE2726186C3 (de) * | 1977-06-10 | 1981-05-14 | Pan Data Ab, Stockholm | Elektrische Überwachungsvorrichtung |
US7821412B2 (en) * | 2006-09-15 | 2010-10-26 | Applied Nanotech Holdings, Inc. | Smoke detector |
US9564045B2 (en) * | 2014-04-14 | 2017-02-07 | Stephen D. Ainsworth | Alarm system testing device |
-
1966
- 1966-12-29 CH CH1875166A patent/CH468683A/de unknown
-
1967
- 1967-02-01 AT AT93567A patent/AT278597B/de not_active IP Right Cessation
- 1967-12-14 BE BE707959D patent/BE707959A/xx not_active IP Right Cessation
- 1967-12-27 US US693937A patent/US3559196A/en not_active Expired - Lifetime
- 1967-12-28 DK DK656167AA patent/DK122548B/da not_active IP Right Cessation
- 1967-12-28 SE SE17925/67A patent/SE330659B/xx unknown
- 1967-12-29 GB GB59190/67A patent/GB1200120A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3559196A (en) | 1971-01-26 |
CH468683A (de) | 1969-02-15 |
SE330659B (de) | 1970-11-23 |
DE1566687B1 (de) | 1971-04-01 |
DK122548B (da) | 1972-03-13 |
AT278597B (de) | 1970-02-10 |
BE707959A (de) | 1968-04-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |