FR2338492B2 - - Google Patents

Info

Publication number
FR2338492B2
FR2338492B2 FR7601107A FR7601107A FR2338492B2 FR 2338492 B2 FR2338492 B2 FR 2338492B2 FR 7601107 A FR7601107 A FR 7601107A FR 7601107 A FR7601107 A FR 7601107A FR 2338492 B2 FR2338492 B2 FR 2338492B2
Authority
FR
France
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
FR7601107A
Other languages
French (fr)
Other versions
FR2338492A2 (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.)
GAMMA ELECTRONIC
Original Assignee
GAMMA ELECTRONIC
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 GAMMA ELECTRONIC filed Critical GAMMA ELECTRONIC
Priority to FR7601107A priority Critical patent/FR2338492A2/en
Publication of FR2338492A2 publication Critical patent/FR2338492A2/en
Application granted granted Critical
Publication of FR2338492B2 publication Critical patent/FR2338492B2/fr
Granted legal-status Critical Current

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
    • G08B17/113—Constructional details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
    • G01N27/64—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
    • G01N27/66—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber and measuring current or voltage
    • 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
FR7601107A 1976-01-16 1976-01-16 Smoke detector with two serially connected ionisation chambers - has membrane electrode separating chambers and supporting alpha emitting radioactive source for ionisation Granted FR2338492A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7601107A FR2338492A2 (en) 1976-01-16 1976-01-16 Smoke detector with two serially connected ionisation chambers - has membrane electrode separating chambers and supporting alpha emitting radioactive source for ionisation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7601107A FR2338492A2 (en) 1976-01-16 1976-01-16 Smoke detector with two serially connected ionisation chambers - has membrane electrode separating chambers and supporting alpha emitting radioactive source for ionisation

Publications (2)

Publication Number Publication Date
FR2338492A2 FR2338492A2 (en) 1977-08-12
FR2338492B2 true FR2338492B2 (en) 1979-03-30

Family

ID=9168024

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7601107A Granted FR2338492A2 (en) 1976-01-16 1976-01-16 Smoke detector with two serially connected ionisation chambers - has membrane electrode separating chambers and supporting alpha emitting radioactive source for ionisation

Country Status (1)

Country Link
FR (1) FR2338492A2 (en)

Also Published As

Publication number Publication date
FR2338492A2 (en) 1977-08-12

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