GB1211181A - Improvements in or relating to an ionization chamber in particular for a fire detecting apparatus - Google Patents
Improvements in or relating to an ionization chamber in particular for a fire detecting apparatusInfo
- Publication number
- GB1211181A GB1211181A GB167969A GB167969A GB1211181A GB 1211181 A GB1211181 A GB 1211181A GB 167969 A GB167969 A GB 167969A GB 167969 A GB167969 A GB 167969A GB 1211181 A GB1211181 A GB 1211181A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylindrical wall
- electrode
- rod
- jan
- constituting
- 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
-
- 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
- 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
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Fire-Detection Mechanisms (AREA)
- Measuring Fluid Pressure (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR136627 | 1968-01-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1211181A true GB1211181A (en) | 1970-11-04 |
Family
ID=8644792
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB167969A Expired GB1211181A (en) | 1968-01-19 | 1969-01-10 | Improvements in or relating to an ionization chamber in particular for a fire detecting apparatus |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE1900888C3 (de) |
FR (1) | FR1568048A (de) |
GB (1) | GB1211181A (de) |
SU (1) | SU368776A3 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02307198A (ja) * | 1989-05-22 | 1990-12-20 | Hochiki Corp | イオン化式煙感知器 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE696054C (de) * | 1936-12-02 | 1940-09-10 | Walter Jaeger | Verfahren und Einrichtung zur Gas- und Schwebestoffanalyse |
DE718327C (de) * | 1937-06-09 | 1942-03-09 | Walter Jaeger | Feuer- und Rauchmelder |
DE720180C (de) * | 1938-11-24 | 1942-04-27 | Walter Jaeger | Verfahren und Vorrichtung zur UEberwachung eines Gases |
GB657548A (en) * | 1947-12-15 | 1951-09-19 | Electronic Instr Ltd | Improvements in or relating to devices for testing gases |
DE844220C (de) * | 1949-08-01 | 1952-07-17 | Elektro Watt Elek Sche | Gasdetektor |
US2646556A (en) * | 1950-06-17 | 1953-07-21 | C O Two Fire Equipment Co | Supervised alarm system |
FR1147287A (fr) * | 1956-04-06 | 1957-11-21 | Dispositif de détection de fumées, de gaz radioactifs, de flammes (ou de lumière)et de contacts | |
NL99411C (de) * | 1957-01-25 | |||
NL286979A (de) * | 1962-01-10 | 1900-01-01 | ||
LU48167A1 (de) * | 1965-03-11 | 1966-09-12 | Applic Electroniques Ets |
-
1968
- 1968-01-19 FR FR1568048D patent/FR1568048A/fr not_active Expired
-
1969
- 1969-01-09 DE DE19691900888 patent/DE1900888C3/de not_active Expired
- 1969-01-10 GB GB167969A patent/GB1211181A/en not_active Expired
- 1969-01-17 SU SU1298404A patent/SU368776A3/ru active
Also Published As
Publication number | Publication date |
---|---|
FR1568048A (de) | 1969-05-23 |
DE1900888A1 (de) | 1969-09-04 |
DE1900888C3 (de) | 1981-07-16 |
DE1900888B2 (de) | 1976-07-01 |
SU368776A3 (de) | 1973-01-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
435 | Patent endorsed 'licences of right' on the date specified (sect. 35/1949) | ||
PCNP | Patent ceased through non-payment of renewal fee |