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 apparatus

Info

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
Application number
GB167969A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VIGIFEU
Original Assignee
VIGIFEU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by VIGIFEU filed Critical VIGIFEU
Publication of GB1211181A publication Critical patent/GB1211181A/en
Expired legal-status Critical Current

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 SYSTEMS, e.g. PERSONAL 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)
GB167969A 1968-01-19 1969-01-10 Improvements in or relating to an ionization chamber in particular for a fire detecting apparatus Expired GB1211181A (en)

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 (https=)
FR (1) FR1568048A (https=)
GB (1) GB1211181A (https=)
SU (1) SU368776A3 (https=)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
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 (12)

* Cited by examiner, † Cited by third party
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
DE1056008B (de) * 1956-04-06 1959-04-23 Phys Maurice E Nahmias Dr Vorrichtung zur Feststellung von Rauch etc.
NL99411C (https=) * 1957-01-25
CH355380A (de) * 1957-10-30 1961-06-30 Cerberus Gmbh Einrichtung zur Feststellung von Änderungen in der Zusammensetzung eines Gases
DE1287825B (https=) * 1962-01-10
LU48167A1 (https=) * 1965-03-11 1966-09-12 Applic Electroniques Ets

Also Published As

Publication number Publication date
DE1900888C3 (de) 1981-07-16
DE1900888A1 (de) 1969-09-04
FR1568048A (https=) 1969-05-23
DE1900888B2 (de) 1976-07-01
SU368776A3 (https=) 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