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FR1490273A - Automatic fire alarm device using an ion device - Google Patents

Automatic fire alarm device using an ion device

Info

Publication number
FR1490273A
FR1490273A FR74022A FR74022A FR1490273A FR 1490273 A FR1490273 A FR 1490273A FR 74022 A FR74022 A FR 74022A FR 74022 A FR74022 A FR 74022A FR 1490273 A FR1490273 A FR 1490273A
Authority
FR
France
Prior art keywords
fire alarm
automatic fire
ion
alarm device
ion device
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
FR74022A
Other languages
French (fr)
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.)
Nittan Co Ltd
Original Assignee
Nittan Co Ltd
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
Priority claimed from JP1966028133U external-priority patent/JPS446089Y1/ja
Application filed by Nittan Co Ltd filed Critical Nittan Co Ltd
Priority to FR74022A priority Critical patent/FR1490273A/en
Application granted granted Critical
Publication of FR1490273A publication Critical patent/FR1490273A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T7/00—Details of radiation-measuring instruments
    • G01T7/12—Provision for actuation of an alarm
    • G01T7/125—Alarm- or controlling circuits using ionisation chambers, proportional counters or Geiger-Mueller tubes, also functioning as UV detectors
    • 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
    • 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

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR74022A 1966-03-30 1966-08-24 Automatic fire alarm device using an ion device Expired FR1490273A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR74022A FR1490273A (en) 1966-03-30 1966-08-24 Automatic fire alarm device using an ion device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1966028133U JPS446089Y1 (en) 1966-03-30 1966-03-30
FR74022A FR1490273A (en) 1966-03-30 1966-08-24 Automatic fire alarm device using an ion device

Publications (1)

Publication Number Publication Date
FR1490273A true FR1490273A (en) 1967-07-28

Family

ID=26172732

Family Applications (1)

Application Number Title Priority Date Filing Date
FR74022A Expired FR1490273A (en) 1966-03-30 1966-08-24 Automatic fire alarm device using an ion device

Country Status (1)

Country Link
FR (1) FR1490273A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2384307A1 (en) * 1977-03-16 1978-10-13 Siemens Ag IONIZATION OPERATED FIRE ALARM
USD277836S (en) 1983-01-12 1985-03-05 Emhart Industries, Inc. Smoke alarm
USD279872S (en) 1983-08-22 1985-07-30 American District Telegraph Company Photoelectric smoke detector
US4851819A (en) * 1987-03-27 1989-07-25 Hochiki Kabushiki Kaisha Photoelectric smoke detector with permanently fixed insect net

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2384307A1 (en) * 1977-03-16 1978-10-13 Siemens Ag IONIZATION OPERATED FIRE ALARM
USD277836S (en) 1983-01-12 1985-03-05 Emhart Industries, Inc. Smoke alarm
USD279872S (en) 1983-08-22 1985-07-30 American District Telegraph Company Photoelectric smoke detector
US4851819A (en) * 1987-03-27 1989-07-25 Hochiki Kabushiki Kaisha Photoelectric smoke detector with permanently fixed insect net

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