FR2430612A1 - Chambre d'ionisation reglable - Google Patents

Chambre d'ionisation reglable

Info

Publication number
FR2430612A1
FR2430612A1 FR7820017A FR7820017A FR2430612A1 FR 2430612 A1 FR2430612 A1 FR 2430612A1 FR 7820017 A FR7820017 A FR 7820017A FR 7820017 A FR7820017 A FR 7820017A FR 2430612 A1 FR2430612 A1 FR 2430612A1
Authority
FR
France
Prior art keywords
gas
radiation beam
correction
adjustable
ionisation chamber
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.)
Withdrawn
Application number
FR7820017A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7820017A priority Critical patent/FR2430612A1/fr
Publication of FR2430612A1 publication Critical patent/FR2430612A1/fr
Priority to FR8008127A priority patent/FR2480435A2/fr
Withdrawn legal-status Critical Current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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

Suivant le mode de réalisation représenté sur la figure, dans la chambre 1 est incluse la source radioactive 2. Les électrodes sont désignées par les références 8-9 et 10. Une pièce mobile 3 pouvant pivoter en 12 est terminée par la partie 4 qui peut occulter ou non, ou partiellement, à volonté, la source radioactive 2. La pièce 3 est manoeuvrée au moyen d'un levier verrouillable 11. Cette disposition permet d'obtenir à la fois une grande stabilité et une grande efficacité. Applications : chambres d'ionisation utilisées notamment dans les détecteurs de gaz et de fumées.
FR7820017A 1978-07-05 1978-07-05 Chambre d'ionisation reglable Withdrawn FR2430612A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7820017A FR2430612A1 (fr) 1978-07-05 1978-07-05 Chambre d'ionisation reglable
FR8008127A FR2480435A2 (fr) 1978-07-05 1980-04-11 Chambre d'ionisation reglable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7820017A FR2430612A1 (fr) 1978-07-05 1978-07-05 Chambre d'ionisation reglable

Publications (1)

Publication Number Publication Date
FR2430612A1 true FR2430612A1 (fr) 1980-02-01

Family

ID=9210339

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7820017A Withdrawn FR2430612A1 (fr) 1978-07-05 1978-07-05 Chambre d'ionisation reglable

Country Status (1)

Country Link
FR (1) FR2430612A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4384488A (en) * 1980-05-09 1983-05-24 Cerberus Ag Smoke detector
FR2640384A1 (fr) * 1988-12-13 1990-06-15 Morrison Co Ets Detecteur de gaz de combustion par ionisation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1027984A (fr) * 1949-08-01 1953-05-18 Electro Watt Détecteur de gaz
FR1185495A (fr) * 1957-10-24 1959-07-31 Dispositif de détection et de contrôle de variations de composition d'un gaz, utilisable notamment comme prédétecteur d'incendie
US3935492A (en) * 1970-11-13 1976-01-27 Nittan Company, Ltd. Ionization smoke detector
US4007374A (en) * 1975-07-07 1977-02-08 Gulf & Western Manufacturing Company (Systems) Ionization detector with improved radiation source
FR2370279A1 (fr) * 1976-11-08 1978-06-02 Gulf & Western Mfg Co Detecteur d'ionisation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1027984A (fr) * 1949-08-01 1953-05-18 Electro Watt Détecteur de gaz
FR1185495A (fr) * 1957-10-24 1959-07-31 Dispositif de détection et de contrôle de variations de composition d'un gaz, utilisable notamment comme prédétecteur d'incendie
US3935492A (en) * 1970-11-13 1976-01-27 Nittan Company, Ltd. Ionization smoke detector
US4007374A (en) * 1975-07-07 1977-02-08 Gulf & Western Manufacturing Company (Systems) Ionization detector with improved radiation source
FR2370279A1 (fr) * 1976-11-08 1978-06-02 Gulf & Western Mfg Co Detecteur d'ionisation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4384488A (en) * 1980-05-09 1983-05-24 Cerberus Ag Smoke detector
US4475390A (en) * 1980-05-09 1984-10-09 Cerberus Ag Smoke detector
FR2640384A1 (fr) * 1988-12-13 1990-06-15 Morrison Co Ets Detecteur de gaz de combustion par ionisation
WO1990007169A1 (fr) * 1988-12-13 1990-06-28 Etablissements Morrison & Co Detecteur de gaz de combustion par ionisation

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Legal Events

Date Code Title Description
ST Notification of lapse